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TABLE OF CONTENTS
TAB 1 Tentative Agenda
TAB 2 Tentative Order of Discussion
TAB 3 Standards Task Group Report
TAB 4 UPC Code Review Task Group Report
TAB 5 UPC Storm Drainage System Sizing Task Group Report
TAB 6 Technical Correlating Committee Report
TAB 7 Uniform Plumbing Code Change Proposals
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2013 Uniform Plumbing Code Technical Committee Meetings Sheraton
Salt Lake City, Salt Lake City, UT
April 29 - May 1, 2013 AGENDA
I. Call to order
II. Chairman Comments
III. Announcements
IV. Self Introductions
V. Review and Approval of Agenda
VI. Approval of Minutes - Previous Meeting (Via Teleconference
on May
10, 2012)
VII. Consideration of Standards Task Group Report
VIII. Consideration of UPC Code Review Task Group Report
IX. Consideration of Storm Drainage System Sizing Task Group
Report
X. Consideration of Technical Correlating Committee Report
XI. Discussion of Code Change Proposals to the Uniform Plumbing
Code
XII. Other Business
XIII. Future Meetings
XIV. Adjournment
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TENTATIVE ORDER OF DISCUSSION 2013 PROPOSED CODE CHANGES TO THE
UNIFORM PLUMBING CODE
The following is the tentative order of discussion on which the
proposed changes will be discussed at the Technical Committee
Meeting. Proposed code changes that are grouped together are those
that are both indented and separated by lines. Indented proposed
code changes are those being discussed out of numerical order. Item
# 001
Item # 002 Item # 004 Item # 006 Item # 008 Item # 009 Item #
010 Item # 011 Item # 012 Item # 013 Item # 014 Item # 015 Item #
021 Item # 031 Item # 033 Item # 034 Item # 035 Item # 041 Item #
047 Item # 057 Item # 063 Item # 153 Item # 156 Item # 157 Item #
166 Item # 299 Item # 302 Item # 306 Item # 343 Item # 359 Item #
360 Item # 361 Item # 363 Item # 364 Item # 005 Item # 017
Item # 003 Item # 007 Item # 016 Item # 018 Item # 019
Item # 020 Item # 022 Item # 023 Item # 024 Item # 025 Item #
026
Item # 027 Item # 347 Item # 350 Item # 351 Item # 367 Item #
368
Item # 028 Item # 029 Item # 270
Item # 030 Item # 032 Item # 036 Item # 037 Item # 038 Item #
039 Item # 040 Item # 042 Item # 043
Item # 044 Item # 045 Item # 046 Item # 225 Item # 245
Item # 048 Item # 049 Item # 050 Item # 051 Item # 052 Item #
053 Item # 054
Item # 055 Item # 056
Item # 058 Item # 059 Item # 060
Item # 061 Item # 062
Item # 064 Item # 265
Item # 065 Item # 066
Item # 067 Item # 068
Item # 069 Item # 070 Item # 071 Item # 072
Item # 073 Item # 074 Item # 147
Item # 075 Item # 076 Item # 077
Item # 078 Item # 079 Item # 112 Item # 080 Item # 081 Item #
083 Item # 084 Item # 114 Item # 082 Item # 085
Item # 086 Item # 087 Item # 088
Item # 089 Item # 143 Item # 090 Item # 139
Item # 091 Item # 092 Item # 093 Item # 094 Item # 095
Item # 096 Item # 097 Item # 098
Item # 099 Item # 100
Item # 101 Item # 236
Item # 102 Item # 103 Item # 104 Item # 105 Item # 106 Item #
107 Item # 108 Item # 109 Item # 110 Item # 111 Item # 113
Item # 115 Item # 116 Item # 117 Item # 118 Item # 119
Item # 120 Item # 121 Item # 122
Item # 123 Item # 124
Item # 125 Item # 126 Item # 127 Item # 128 Item # 129
Item # 130 Item # 131
Item # 132 Item # 133
Item # 134 Item # 135 Item # 136
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Item # 137 Item # 138 Item # 140 Item # 141 Item # 142 Item #
144 Item # 145 Item # 146 Item # 148 Item # 149 Item # 150 Item #
151 Item # 152
Item # 154 Item # 155
Item # 158 Item # 159 Item # 160
Item # 161 Item # 162
Item # 163 Item # 164 Item # 165
Item # 167 Item # 168 Item # 169 Item # 170 Item # 171 Item #
172 Item # 173 Item # 174 Item # 175 Item # 176 Item # 177 Item #
178
Item # 179 Item # 198
Item # 180 Item # 181 Item # 182 Item # 183 Item # 184 Item #
185 Item # 186 Item # 187 Item # 188 Item # 189 Item # 190 Item #
191
Item # 192 Item # 193
Item # 194
Item # 195 Item # 196 Item # 197 Item # 199 Item # 200 Item #
201 Item # 202 Item # 203 Item # 204 Item # 205 Item # 206 Item #
207 Item # 208 Item # 209
Item # 210 Item # 211
Item # 212 Item # 213 Item # 214 Item # 215
Item # 216 Item # 217
Item # 218 Item # 219 Item # 220 Item # 221 Item # 222 Item #
223
Item # 224 Item # 231 Item # 233
Item # 226 Item # 227 Item # 228 Item # 229 Item # 230 Item #
232 Item # 234 Item # 235 Item # 237 Item # 238 Item # 239 Item #
240 Item # 241 Item # 242 Item # 243 Item # 244 Item # 246 Item #
247 Item # 248 Item # 249 Item # 250 Item # 251
Item # 252 Item # 253 Item # 254 Item # 255 Item # 256 Item #
257 Item # 258 Item # 259 Item # 260 Item # 261
Item # 262 Item # 264
Item # 263 Item # 266 Item # 267 Item # 268 Item # 269 Item #
271
Item # 272 Item # 273 Item # 274 Item # 275 Item # 358
Item # 276 Item # 277 Item # 278 Item # 279 Item # 280 Item #
281 Item # 282
Item # 283 Item # 285
Item # 284 Item # 286 Item # 287 Item # 288 Item # 289 Item #
290
Item # 291 Item # 292 Item # 293 Item # 294
Item # 295 Item # 296 Item # 297 Item # 298 Item # 300 Item #
301 Item # 303 Item # 304 Item # 305 Item # 307
Item # 308 Item # 309 Item # 311 Item # 312 Item # 313 Item #
315 Item # 317 Item # 318 Item # 319 Item # 320 Item # 321 Item #
322 Item # 323 Item # 325 Item # 326 Item # 327 Item # 328 Item #
329 Item # 330 Item # 331
Item # 310 Item # 314 Item # 316 Item # 324
Item # 332 Item # 333 Item # 334 Item # 335 Item # 336 Item #
337 Item # 338 Item # 339 Item # 340 Item # 341 Item # 342
Item # 344 Item # 345 Item # 346 Item # 348 Item # 349 Item #
352 Item # 353 Item # 354 Item # 355
Item # 356 Item # 357
Item # 362 Item # 365 Item # 366 Item # 369
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IAPMO Standards Task Group Report
In accordance with the scope of the Standards Task Group as
approved by the applicable Technical Committees, the
recommendations for referencing standards in the 2012 Uniform
Plumbing Code (UPC), 2012 Uniform Mechanical Code (UMC), 2012
Uniform Swimming Pool, Spa and Hot Tub Code (USPSHTC) and 2012
Uniform Solar Energy & Hydronics Code (USEHC) are as
follows:
1. Two separate standards tables should be included in the code.
One for mandatory standards (mandatory standards as defined in
accordance with IAPMOs Rules and Regulations) and one for
nonmandatory (guidelines, periodicals, handbooks, etc.).
Nonmandatory standards should be located in the appendices. The
Nonmandatory Standards Table should not contain references to
sections of the code. A section should be added to the Nonmandatory
Standards Table that states that approval of such standards should
be in accordance with the Authority Having Jurisdiction.
Substantiation: The task group wants to clarify standards that
are mandatory and enforceable versus nonmandatory. Section 3-3.7.2
of the Regulations of Committee Projects indicates that
nonmandatory standards shall only be referenced as nonmandatory
standards and shall only be included as advisory material in an
IAPMO Code or Standard. Placing nonmandatory standards in the
appendices will avoid such standards from being referenced in the
enforceable chapters of the code. The standards shown in bold and
italicized font within the referenced standards table of each 2012
IAPMO ANSI code was not clear to whether such standards were
mandatory or nonmandatory.
2. Remove all references to nonmandatory standards from the body
of the code.
Substantiation: Logical follow-up to Recommendation #1.
3. Reference the appropriate mandatory standards within the body
of code.
Substantiation: Section 3-3.7.1.1 through Section 3-3.7.1.3 of
the Regulations of Committee Projects indicate the criteria used to
determine Mandatory Referenced Standards. This is a logical
follow-up to Recommendation #1.
4. A charging statement should be added to Chapter 3 indicating
the following: Standards cited in this code shall
be considered part of the requirements of this code and shall be
those standards referenced in Table XXXX.X., and the following
redundant text should be deleted: A list of accepted plumbing
material standards is referenced in Table XXXX.X.
Substantiation: This is a statement that is already indicated in
the referenced standard table chapters of IAPMOs (4) ANSI codes and
should be brought forward to Chapter 3 to provide clear direction
to the end user.
5. The charging statement should be revised in the referenced
standards chapter of each code as follows:
XXXX.X Mandatory Standards. Table XXXX.X lists the mandatory
standards that are referenced in this code. The standards are
indentified by the name of the developing organization, title, and
date or edition. The application of the referenced standards shall
be as specified in Section 3XX.X
A charging statement should be added in the appendices of each
code for the Nonmandatory Standards Table as follows: XXXX.X
Nonmandatory Standards. Table XXXX.X lists nonmandatory standards
and guidelines that are used in the industry. Substantiation: The
charging statement located in the referenced standards table of
each of IAPMOs ANSI codes should be revised to clarify the intent
of the Mandatory Standards Table, and a charging statement should
be added for the Nonmandatory Standards Table to clarify its intent
as well. These charging statements are consistent with the actions
taken on Recommendation #4.
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2015 UPC CODE REVIEW TASK GROUP The scope of this group is to
identify and review issues that have been brought forth by
membership and industry, in regards to the 2012 UPC, in an attempt
to make the code more user-friendly. The recommendations, along
with a report of underlying issues, will be forwarded to the UPC
Technical Committee for review. Item #1 RECOMMENDATION: Add new
text as follows: 203.0 Accepted Engineering Practice. That which
conforms to technical or scientific-based principles, tests, or
standards that are accepted by the industry. SUBSTANTIATION: The
term accepted engineering practice is used in Sections 309.1,
501.1, 911.1, 1208.7.5.1, 1314.1, and E 35.1 without being defined.
The proposed definition assists the end user in applying and
enforcing this term, and is consistent with terminology used in
other industry standards. TASK GROUP ACTION: Accept as Submitted
Item #2 RECOMMENDATION: Revise text as follows: 203.0 Authority
Having Jurisdiction. The organization, office, or individual
responsible for enforcing the requirements of a code or standard,
or for approving equipment, materials, installations, or
procedures. The Authority Having Jurisdiction shall may be a
federal, state, local, or other regional department or an
individual such as a plumbing official, mechanical official, labor
department official, health department official, building official,
or others having statutory authority. In the absence of a statutory
authority, the Authority Having Jurisdiction may be some other
responsible party. This definition shall may include the Authority
Having Jurisdictions duly authorized representative.
SUBSTANTIATION: In accordance with the Manual of Style, definitions
should not be written in mandatory language. TASK GROUP ACTION:
Forward to Technical Committee TASK GROUP STATEMENT: The concern is
that by changing shall to may that the definition could be
interpreted that anyone could be considered an Authority Having
Jurisdiction. The task group believes that all of the text except
the first sentence of the definition could be relocated to Section
102.1 to satisfy the concerns of the group, and meet the
requirements of the IAPMO Manual of Style.
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Item #3 RECOMMENDATION: Revise text as follows: 204.0 Branch
Interval. A length of soil or waste stack corresponding in general
to a story height, but in no case less than 8 feet (2438 mm),
within which the horizontal branches from one floor or story of the
building are connected to the stack. C 5.0 Drainage System Sizing.
C 5.1 Definition. For the purposes of this code, this definition
shall apply to this appendix: Branch Interval. A length of soil or
waste stack corresponding in general to a story height, but in no
case less than 8 feet (2438 mm), within which the horizontal
branches from one floor or story of the building are connected to
the stack. (renumber remaining sections) SUBSTANTIATION: The term
branch interval is not only used in Appendix C, but Section 703.2
as well. Therefore, the definition should be relocated to Chapter
2. TASK GROUP ACTION: Forward to Technical Committee TASK GROUP
STATEMENT: Even though Section 703.2 includes the text branch
interval, the task group believes this was done in error as Table
703.2 has nothing to do with branch intervals. Therefore, the
definition should remain in Appendix C. Item #4 RECOMMENDATION: Add
new text as follows: 205.0 Cleanout. An access opening that
facilitates the removal of an obstruction. SUBSTANTIATION: The term
cleanout is used in Sections 316.1, 317.1, 509.5.6.2, 509.5.9,
707.0, 710.1, 712.1, 719.0, 801.2.2, 803.1, 909.1, 910.6, 1002.3,
1008.1, 1017.1, 1101.12, 1103.4, 1109.2, B 1.0, C 7.7, E 10.1, and
E 70.0 without being defined. The proposed definition assists the
end user in applying and enforcing this term, and is consistent
with terminology used in other industry standards. TASK GROUP
ACTION: Forward to Technical Committee TASK GROUP STATEMENT: The
term cleanout is well known throughout the industry, and therefore
a definition is not necessary. Furthermore, the proposed definition
is too limiting as defined.
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Item #5 RECOMMENDATION: Add new text as follows: 205.0
Combination Temperature and Pressure-Relief Valve. A relief valve
that actuates when a set temperature or pressure is reached.
SUBSTANTIATION: The term temperature and pressure relief valve is
used in Sections 505.2 and 608.3 without being defined. The
proposed definition assists the end user in applying and enforcing
this term, and is consistent with terminology used in other
industry standards. TASK GROUP ACTION: Accept as Modified 205.0
Combination Temperature and Pressure-Relief Valve. A relief valve
that actuates when a set temperature, or pressure, or both is
reached. Also known as a T&P Valve. Item #6 RECOMMENDATION: Add
new text as follows: 205.0 Common Vent. A plumbing vent that serves
more than one fixture and connects at the junction of the fixture
drains. SUBSTANTIATION: The term common vent is used in Sections
908.1, 908.2, and Appendix C without being defined. The proposed
definition assists the end user in applying and enforcing this
term, and is consistent with terminology used in other industry
standards. TASK GROUP ACTION: Forward to Technical Committee TASK
GROUP STATEMENT: A definition is not needed as other sections of
the code clearly explain the meaning of a common vent (ex: Section
905.6). Furthermore, the term can be used differently based on
application, and therefore cannot be easily defined. Item #7
RECOMMENDATION: Add new text as follows: 206.0 Drainage Fixture
Unit (DFU). A measure of the probable discharge of plumbing
fixtures into the drainage system. The measure is based on the rate
of discharge from the fixtures; the duration of the discharge; and
the average time between uses. SUBSTANTIATION: The term drainage
fixture unit is used in Sections 702.1, 702.2, 908.2.2, 1014.3.6, C
4.1, C 4.3, C 5.2, C 5.3, C 5.4, C 6.1, C 7.4, C 9.2, and E 9.1
without being defined. The proposed definition assists the end
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4
user in applying and enforcing this term, and is consistent with
terminology used in other industry standards. TASK GROUP ACTION:
Forward to Technical Committee TASK GROUP STATEMENT: The proposed
definition is inaccurate as a DFU is not a measurement, but a
unit-less rating. Item #8 RECOMMENDATION: Revise text as follows:
206.0 Drainage System. Includes all the piping within public or
private premises that conveys sewage, storm water, or other liquid
wastes to a legal point of disposal, but does not include the mains
of a public sewer system or a public sewage treatment or disposal
plant. SUBSTANTIATION: The addition of storm water to the
definition for drainage system will provide correlation with the
terminology used throughout Chapter 11 and Appendix D. TASK GROUP
ACTION: Forward to Technical Committee TASK GROUP STATEMENT: The
intent of the definition for drainage system is applicable to
sanitary drainage systems only, and therefore storm water should
not be included in the definition. Item #9 RECOMMENDATION: Add new
text as follows: 207.0 Expansion Joint. An arrangement of piping
that permits the contraction and expansion of a piping system.
SUBSTANTIATION: The term expansion joint is used in Sections 705.10
and 1101.4 without being defined. The proposed definition assists
the end user in applying and enforcing this term, and is consistent
with terminology used in other industry standards. TASK GROUP
ACTION: Accept as Modified Expansion Joint. An fitting or
arrangement of piping that permits the contraction and expansion of
a piping system.
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Item #10 RECOMMENDATION: Add new text as follows: 208.0 Faucet.
A valve end of a water-supply pipe by which water can be drawn from
or held within the pipe. SUBSTANTIATION: The term faucet is used in
Sections 403.4, 417.0, and 420.2 without being defined. The
proposed definition assists the end user in applying and enforcing
this term, and is consistent with terminology used in other
industry standards. TASK GROUP ACTION: Forward to Technical
Committee TASK GROUP STATEMENT: The term faucet is well known
throughout the industry, and therefore a definition is not
necessary. Item #11 RECOMMENDATION: Delete text without
substitution: 218.0 Provision for Location of Point of Delivery.
The location of the point of delivery shall be acceptable to the
serving gas supplier. [NFPA 54:5.2] SUBSTANTIATION: The term
provision for location of point of delivery is not a definition,
and in fact this extraction is duplicated in Chapter 12 (Section
1208.2). For informational purposes only, Section 1208.2 is shown
as follows: The location of the point of delivery shall be
acceptable to the serving gas supplier. [NFPA 54:5.2] TASK GROUP
ACTION: Accept as Submitted Item #12 RECOMMENDATION: Add new text
as follows: 221.0 Sump Pump. A pump that works automatically to
remove the contents of a sump pit. SUBSTANTIATION: The term sump
pump is used in Sections 805.1 and 1101.5 without being defined.
The proposed definition assists the end user in applying and
enforcing this term, and is consistent with terminology used in
other industry standards. TASK GROUP ACTION: Accept as Modified
Sump Pump. A pump that works automatically to removes the contents
of a sump or pit.
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Item #13 RECOMMENDATION: Add new text as follows: 222.0 Toilet
Facility. A room or space that contains not less than one water
closet and one lavatory. SUBSTANTIATION: The term toilet facility
is used throughout Section 422.0 without being defined. The
proposed definition assists the end user in applying and enforcing
this term, and is consistent with terminology used in other
industry standards. TASK GROUP ACTION: Accept as Modified Toilet
Facility. A room or space that contains fixtures designed for the
elimination of human waste and hand washing not less than one water
closet and one lavatory. Item #14 RECOMMENDATION: Delete text
without substitution: 223.0 Unconfined Space. A room or space
having a volume equal to not less than 50 cubic feet per 1000 Btu/h
(4.83 m3/kW) of the aggregate input rating of all fuel-burning
appliances installed in that space. Rooms communicating directly
with the space in which the appliances are installed, through
openings not furnished with doors, are considered a part of the
unconfined space. SUBSTANTIATION: The definition for unconfined
should be deleted as the term is not used anywhere within the UPC.
The deletion is in accordance with the IAPMO Manual of Style that
requires that all definitions in Chapter 2 be referenced elsewhere
within the code. TASK GROUP ACTION: Accept as Submitted Item #15
RECOMMENDATION: Add new text as follows: 225.0 Water Outlet. An
opening from which water is supplied to a fixture through the
atmosphere, to a boiler or heating system, or to any other device
or equipment that requires water to operate that is not a part of
the plumbing system. SUBSTANTIATION: The term water outlet is used
in Sections 603.5.7, 603.5.11, 603.5.18, 608.2, 1603.11.2.2,
1604.12.2.2, 1702.9.6, 1702.11.2.2, E 61.0, E 78.1, K 104.5, and L
504.5 without being defined. The proposed definition assists the
end user in applying and enforcing this term, and is consistent
with terminology used in other industry standards.
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TASK GROUP ACTION: Accept as Modified Water Outlet. An opening
from which water is supplied to a fixture through the atmosphere,
to a boiler or heating system, or to any other device or equipment
that requires water to operate that is not a part of the plumbing
system. Item #16 RECOMMENDATION: Revise text as follows: 301.0
General. 301.1 Applicability. This chapter shall govern the general
requirements, not specific to other chapters, for the installation
of plumbing systems. (renumber remaining sections) 401.0 General.
401.1 Applicability. This chapter shall govern the materials and
installation of plumbing fixtures, including faucets and fixture
fittings, and the minimum number of plumbing fixtures required
based on occupancy. (renumber remaining sections) 601.0 Hot and
Cold Water Required. General. 601.1 Applicability. This chapter
shall govern the materials, design, and installation of water
supply systems, including methods and devices used for backflow
prevention. 601.1 General. 601.2 Hot and Cold Water Required.
Except where not deemed necessary for safety or sanitation by the
Authority Having Jurisdiction, each plumbing fixture shall be
provided with an adequate supply of potable running water piped
thereto in an approved manner, so arranged as to flush and keep it
in a clean and sanitary condition without danger of backflow or
cross-connection. Water closets and urinals shall be flushed by
means of an approved flush tank or flushometer valve. Exception:
Listed fixtures that do not require water for their operation and
are not connected to the water supply.
In occupancies where plumbing fixtures are installed for private
use, hot water shall be required for bathing, washing, laundry,
cooking purposes, dishwashing or maintenance. In occupancies where
plumbing fixtures are installed for public use, hot water shall be
required for bathing and washing purposes. This requirement shall
not supersede the requirements for individual temperature control
limitations for public lavatories, bidets, bathtubs, whirlpool
bathtubs and shower control valves. (renumber remaining sections)
701.0 General. 701.1 Applicability. This chapter shall govern the
materials, design, and installation of sanitary drainage systems
and building sewers. (renumber remaining sections) 801.0 General.
801.1 Applicability. This chapter shall govern the materials,
design, and installation of indirect waste piping, receptors, and
connections; and provisions for discharge and disposal of
condensate wastes, chemical wastes, industrial wastes, and clear
water wastes. (renumber remaining sections) 901.0 General. 901.1
Applicability. This chapter shall govern the materials, design, and
installation of plumbing vent systems.
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(renumber remaining sections) 1001.0 General. 1001.1
Applicability. This chapter shall govern the materials, design, and
installation of traps and interceptors. (renumber remaining
sections) 1101.0 General. 1101.1 Applicability. This chapter shall
govern the materials, design, and installation of storm water
drainage systems. (renumber remaining sections) 1202.0 1201.0
General. 1202.1 Installation 1201.1 Applicability. The regulations
of this chapter shall govern the installation of fuel gas piping in
or in connection with a building, structure or within the property
lines of premises up to 5 pounds-force per square inch (34 kPa),
other than service pipe. Fuel oil piping systems shall be installed
in accordance with NFPA 31. 1201.0 Scope of Gas Piping. (renumber
remaining sections) A 1.0 General. A 1.1 Applicability. This
appendix provides a general procedure for sizing a water supply
system. Because of the variable conditions encountered, it is
impractical to lay down definite detailed rules of procedure for
determining the sizes of water supply pipes in an appendix, which
shall necessarily be limited in length. For a more adequate
understanding of the problems involved, refer to Water-Distributing
Systems for Buildings, Report BMS 79 of the National Bureau of
Standards; and Plumbing Manual, Report BMS 66, also published by
the National Bureau of Standards. The following is a suggested
order of procedure for sizing the water supply system. (renumber
remaining sections) B 1.0 General. B 1.1 Applicability. This
appendix provides general guidelines for the design and
installation of a combination waste and vent system. (renumber
remaining sections) D 1.0 Roof Drainage General. D 1.1 General
Applicability. This appendix provides general guidelines for the
sizing of storm water drainage systems based on maximum rates of
rainfall for various cities. The rainfall rates in Table D 1.1
shall be permitted to be used for design unless higher values are
established locally. (renumber remaining sections)
APPENDIX G SIZING OF VENTING SYSTEMS SERVING APPLIANCES EQUIPPED
WITH DRAFT HOODS, CATEGORY I APPLIANCES, AND APPLIANCES LISTED FOR
USE WITH
TYPE B VENTS G 1.0 General. G 1.1 Applicability. This appendix
provides general guidelines for sizing venting systems serving
appliances equipped with draft hoods, Category I appliances, and
appliances listed for use with Type B vents.
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(renumber remaining sections) H 1.0 Private Sewage Disposal
General. H 1.1 Applicability. This appendix provides general
guidelines for the materials, design, and installation of private
sewage disposal systems. (renumber remaining sections) J 1.0
General. J 1.1 Applicability. This appendix provides general
guidelines for the sizing of combination indoor and outdoor
combustion and ventilation air openings. (renumber remaining
sections) SUBSTANTIATION: In accordance with the Manual of Style, a
section that outlines the purpose or relevancy for a chapter or
appendix should be included to assist the end user in the
application and enforcement of the code. The chapters and
appendices not addressed above already have sections that outline
the purpose or relevancy of the chapter or appendix. TASK GROUP
ACTION: Accept as Submitted Item #17 RECOMMENDATION: Delete text
without substitution: 301.1.3 Existing Buildings. In existing
buildings or premises in which plumbing installations are to be
altered, repaired, or renovated, the Authority Having Jurisdiction
has discretionary powers to permit deviation from the provisions of
this code, provided that such proposal to deviate is first
submitted for proper determination in order that health and safety
requirements, as they pertain to plumbing, shall be observed.
SUBSTANTIATION: Section 301.1.3 should be deleted as the provisions
are already stated in Section 101.6 (Repairs and Alterations), and
therefore redundant. For informational purposes only, Section 101.6
(Repairs and Alterations) is shown as follows: In existing
buildings or premises in which plumbing installations are to be
altered, repaired, or renovated, deviations from the provisions of
this code are permitted, provided such deviations are found to be
necessary and are first approved by the Authority Having
Jurisdiction. TASK GROUP ACTION: Forward to Technical Committee
TASK GROUP STATEMENT: Task group feels that even though the
language is redundant it is necessary as not all jurisdictions
adopt Chapter 1. Item #18 RECOMMENDATION: Revise text as follows:
302.0 Iron Pipe Size (IPS) Pipe Pipe, Tubing, and Fitting
Sizes.
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10
302.1 General. Unless otherwise specified, Iiron, steel, brass,
and copper pipe shall be standard-weight iron pipe size (IPS) pipe
expressed in nominal or standard sizes as referenced in Table
1401.1 for material standards. 316.0 Increasers and Reducers. 316.1
General. Where different sizes of pipes and fittings are to be
connected, the proper size increasers or reducers or reducing
fittings shall be used between the two sizes. Brass or cast-iron
body cleanouts shall not be used as a reducer or adapter from
cast-iron drainage pipe to iron pipe size (IPS) metallic pipe.
TABLE 1208.5.7.2 SPECIFICATIONS FOR THREADING METALLIC PIPE
[NFPA 54: TABLE 5.6.7.3] IRON NOMINAL OR STANDARD PIPE SIZE
(inches)
APPROXIMATE LENGTH OF THREADED PORTION (inches)
APPROXIMATE NUMBER OF THREADS TO BE CUT
(portions of table not shown remain unchanged) E 32.1 Metal.
Metal gas pipe shall be standard-weight wrought iron or steel
(galvanized or black), yellow brass containing not more than 75
percent copper, or internally tinned or treated copper of iron
based on nominal or standard pipe size. Galvanizing shall not be
considered protection against corrosion. (remaining text unchanged)
E 36.6.4 Vent. Tanks with a capacity not larger than 660 gallons
(2498 L) shall be equipped with an open vent not smaller than a 112
inch (40 mm) iron nominal or standard pipe size; tanks with a 500
gallon (1892 L) or less capacity shall have a vent of 11/4 inch (32
mm) iron nominal or standard pipe size. [NFPA 501A:4.4.6.4]
SUBSTANTIATION: Last cycle, the technical committee decided to keep
the term iron pipe size in the UPC based on the reason that the
term is still used in the field. However, this assumption should be
challenged as the term iron pipe size is no longer used in codes or
standards as the term was replaced by the American Standards
Association in March of 1927 with nominal or standard sizes for all
piping, tubing, and fittings. The ASTM, ASME, AWWA, CISPI, and CSA
material standards referenced in Table 1401.1 of the UPC indicate
nominal or standard sizes for all piping, tubing, and fittings, and
not iron pipe size. Furthermore, the term is no longer used within
the industry as referenced in the United Association Instructor
Training Program Course 251 which states: Definition for Pipe Size
See Nominal Pipe Size, and does not state iron pipe size. TASK
GROUP ACTION: Forward to Technical Committee TASK GROUP STATEMENT:
There are still several manufacturers, specifications, and various
other types of literature that specify IPS. Additionally, IPS
material is still in service, and therefore such requirements
should not be deleted from the code. Item #19 RECOMMENDATION: Add
new text as follows: 310.9 Dead Ends. Dead ends shall be prohibited
except where otherwise approved to extend a cleanout in accordance
with Section 707.9. 206.0 Dead End. A drain pipe that measures 2
feet (610 mm) or more in length that is closed on one end.
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11
SUBSTANTIATION: 1. Dead ends tend to collect solid wastes since
they do not receive the discharge from fixtures resulting
in potential backups in the drainage system. Even though Section
310.5 prohibits any installation from obstructing or retarding the
flow of sewage in a drainage system, provisions should be added to
clarify to the end user that the installation of dead ends is
prohibited as well. An exception to the requirement, where approved
by the AHJ, should be added where cleanouts for underfloor piping
need to be extended above the finished floor or to the outside of a
building in accordance with Section 707.9.
2. The definition for dead end is based on similar language
found in ASSE standards. TASK GROUP ACTION: Forward to Technical
Committee TASK GROUP STATEMENT: The proposed language would be very
restrictive and prevent future expansion of a drainage system. Item
#20 RECOMMENDATION: Revise text as follows: 312.6 Freezing
Protection. No water, soil, or waste pipe shall be installed or
permitted outside of a building, in attics or crawl spaces, or in
an exterior wall unless, where necessary, adequate provision is
made to protect such pipe from freezing. SUBSTANTIATION: The
current text does not account for locations such as attics and
crawl spaces that may be susceptible to freezing temperatures.
Therefore, the revision is necessary to protect piping installed in
such locations from freezing. TASK GROUP ACTION: Accept as
Submitted Item #21 RECOMMENDATION: Revise text as follows: 312.12.1
Meter Boxes. Meter boxes shall be constructed in such a manner that
rats rodents cannot enter are not capable of entering a building by
following the service pipes from the box into the building.
SUBSTANTIATION: 1. The term rats should be changed to rodents to be
consistent with the title for Section 312.12
(Rodentproofing). Furthermore, there are other types of vermin
besides rats (ex: mice, snakes, insects, etc.) that should be
prevented from entering a building through openings or
penetrations.
2. The other revisions being proposed are based on the IAPMO
Manual of Style. TASK GROUP ACTION: Accept as Modified 312.12.1
Meter Boxes. Meter boxes shall be constructed in such a manner as
to restrict that rodents or vermin from are not capable of entering
a building by following the service pipes from the box into the
building.
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12
Item #22 RECOMMENDATION: Revise text as follows: 313.5 Piping,
Fixtures, Appliances, and Appurtenances. Piping, fixtures,
appliances, and appurtenances shall be adequately supported in
accordance with this code, the manufacturers installation
instructions, and in accordance with the Authority Having
Jurisdiction. (remaining text unchanged) SUBSTANTIATION: Section
313.0 of the UPC only deals with the support of piping, and not
fixtures, appliances, or appurtenances. Therefore, Section 313.5
(Piping, Fixtures, Appliances, and Appurtenances) should be revised
accordingly. TASK GROUP ACTION: Accept as Submitted Item #23
RECOMMENDATION: Add new text as follows:
TABLE 313.1 HANGERS AND SUPPORTS
MATERIALS TYPES OF JOINTS HORIZONTAL VERTICAL PE-RT Cold
Expansion, Insert and
Compression 1 inch and smaller, 32 inches; 11/4 inches and
larger, 4 feet
Base and each floor; provide mid-story guides
(portions of table not shown remain unchanged) SUBSTANTIATION:
In the 2012 UPC, PE-RT tubing was added as an approved building and
water distribution material. However, provisions were not added for
the support of such tubing in Table 313.1. The proposed language is
based on the recommendations of the Plastics Pipe Institute and
manufacturers. TASK GROUP ACTION: Forward to Technical Committee
TASK GROUP STATEMENT: There is no technical justification as to
where or how the proposed horizontal spacing requirements were
derived. Item #24 RECOMMENDATION: Revise text as follows:
TABLE 313.1 HANGERS AND SUPPORTS
MATERIALS TYPES OF JOINTS HORIZONTAL VERTICAL Lead Wiped or
Burned Continuous support Not to exceed 4 feet 401.2 Lead. Sheet
lead shall be not less than the following: For safe pans not less
than 4 pounds per square foot (lb/ft2) (19 kg/m2) or 116 of an inch
(1.6 mm) thick. (See Table 1401.1)
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13
701.3 Lead. (See Table 1401.1) Sheet lead shall be not less than
the following: (1) For safe pans not less than 4 pounds per square
foot lb/ft2 (19 kg/m2) or 116 of an inch (1.6 mm) thick. (2) For
flashings or vent terminals not less than 3 lb/ft2 (15 kg/m2) or
0.0472 of an inch (1.1989 mm) thick. (3) Lead bends and lead traps
shall be not less than 18 of an inch (3.2 mm) wall thickness.
(renumber remaining sections) 906.6 Lead. (See Table 1401.1) Sheet
lead shall be not less than the following: (1) For safe pans not
less than 4 pounds per square foot (lb/ft2) (19 kg/m2) or 116 of an
inch (1.6 mm) thick. (2) For flashings or vent terminals - not less
than 3 lb/ft2 (15 kg/m2). (3) Lead bends and lead traps shall be
not less than 18 of an inch (3.2 mm) wall thickness. (renumber
remaining sections) 1003.1 General Requirements. Each trap, except
for traps within an interceptor or similar device shall be
self-cleaning. Traps for bathtubs, showers, lavatories, sinks,
laundry tubs, floor drains, urinals, drinking fountains, dental
units, and similar fixtures shall be of standard design, weight and
shall be of ABS, cast-brass, cast-iron, lead, PP, PVC, or other
approved material. An exposed and readily accessible drawn-brass
tubing trap, not less than 17 B & S Gauge (0.045 inch) (0.114
mm), shall be permitted to be used on fixtures discharging domestic
sewage. Exception: Drawn-brass tubing traps shall not be used for
urinals. Each trap shall have the manufacturers name stamped
legibly in the metal of the trap, and each tubing trap shall have
the gauge of the tubing in addition to the manufacturers name. A
trap shall have a smooth and uniform interior waterway.
SUBSTANTIATION: 1. Section 408.7 (Lining for Showers and Receptors)
already provides sizing requirements for lead pans,
and therefore Section 401.2 is redundant. For informational
purposes only, Section 408.7 (7th paragraph) is being shown as
follows: Shower lining materials shall comply with approved
standards acceptable to the Authority Having Jurisdiction. Lead and
copper subpans or linings shall be insulated from conducting
substances other than their connecting drain by 15 pound (6.8 kg)
asphalt felt or its equivalent, and no lead pan or liner shall be
constructed of material weighing less than 4 lb/ft2 (19 kg/m2).
Copper pans or liners shall be not less than No. 24 B & S Gauge
(0.02 inches) (0.51 mm). Joints in lead pans or liners shall be
burned. Joints in copper pans or liners shall be soldered or
brazed. Plastic pans shall not be coated with asphalt-based
materials.
2. The only place within the UPC where safe pans are recognized
is in Section 408.7 (Lining for Showers and Receptors) for built
on-site shower receptors. Therefore, such provisions should not be
located in Chapters 7 or 9.
3. Table 701.1 does not recognize lead as an approved material
to be used for drain, waste, and vent pipe. Therefore, provisions
for hangers used for lead pipe, lead vent terminals, lead traps,
etc. should be deleted.
4. Provisions for lead flashings are not needed in Chapters 7 or
9 as such provisions are already addressed in Section 312.8
(Waterproofing of Openings). For informational purposes only,
Section 312.8 is being shown as follows: Joints at the roof around
pipes, ducts, or other appurtenances shall be made watertight by
the use of lead, copper, galvanized iron, or other approved
flashings or flashing material. Exterior wall openings shall be
made watertight. Counterflashing shall not restrict the required
internal cross-sectional area of the vent.
TASK GROUP ACTION: Accept as Modified 1003.1 General
Requirements. Each trap, except for traps within an interceptor or
similar device shall be self-cleaning. Traps for bathtubs, showers,
lavatories, sinks, laundry tubs, floor drains, urinals, drinking
fountains, dental units, and similar fixtures shall be of standard
design, weight and shall be of ABS, cast-brass, cast-iron, lead,
PP, PVC, or other approved material. An exposed and readily
accessible drawn-brass tubing trap, not less than 17 B & S
Gauge (0.045 inch) (0.114 mm), shall be permitted to be used on
fixtures discharging domestic sewage.
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14
Exception: Drawn-brass tubing traps shall not be used for
urinals. Each trap shall have the manufacturers name stamped
legibly in the metal of the trap, and each tubing trap shall have
the gauge of the tubing in addition to the manufacturers name. A
trap shall have a smooth and uniform interior waterway. Item #25
RECOMMENDATION: Revise text as follows: 314.1 Trenches. Trenches
deeper than the footing of a building or structure, and paralleling
the same, shall be located not less than 45 degrees (0.79 rad)
therefrom from the bottom exterior edge of the footing, or as
approved in accordance with Section 301.0 of this code.
SUBSTANTIATION: The current text is not clear, and is commonly
misunderstood. The proposed text clarifies the intent of the
section. The text referencing approval in accordance with Section
301.0 is not needed as an AHJ can always approve an alternate
material or method of construction in accordance with Section 301.2
(Alternate Materials and Methods of Construction Equivalency). TASK
GROUP ACTION: Accept as Submitted Item #26 RECOMMENDATION: Revise
text as follows: 315.1 Unions. Approved unions shall be permitted
to be used in drainage piping where accessibly located in the trap
seal or between a fixture and its trap; in the vent system, except
underground or in wet vents,; at a any point in the water supply
system,; and in gas piping as permitted by Section 1211.5.
SUBSTANTIATION: The section is commonly misunderstood due to its
structure. In other words, where the text states used in drainage
piping where accessibly located in the trap seal or between a
fixture and its trap in the vent system, except underground or in
wet vents should be restructured as the text is really indicating
two different locations where unions are approved and not just one.
This section as a whole indicates locations within four different
systems (drainage piping, vent piping, water supply, and fuel gas)
where unions are permitted. TASK GROUP ACTION: Accept as Submitted
Item #27 RECOMMENDATION: Delete text without substitution: 315.2.1
Obstruction. No fitting or connection that offers abnormal
obstruction to flow shall be used. The enlargement of a 3 inch (76
mm) closet bend or stub to 4 inches (102 mm) shall not be
considered an obstruction. SUBSTANTIATION: The provisions of
Section 315.2.1 are already stated in Section 310.5, and therefore
redundant. For informational purposes only, Section 310.5
(Obstruction of Flow) is shown as follows: No fitting, fixture
and
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15
piping connection, appliance, device, or method of installation
that obstructs or retards the flow of water, wastes, sewage, or air
in the drainage or venting systems, in an amount exceeding the
normal frictional resistance to flow, shall be used unless it is
indicated as acceptable in this code or is approved in accordance
with Section 301.1 of this code. The enlargement of a 3 inch (76
mm) closet bend or stub to 4 inches (102 mm) shall not be
considered an obstruction. TASK GROUP ACTION: Accept as Submitted
Item #28 RECOMMENDATION: Revise text as follows: 402.5 Setting.
Fixtures shall be set level and in proper alignment with reference
to adjacent walls. No water closet, lavatory, or bidet shall be set
closer than 15 inches (381 mm) from its center to a side wall or
obstruction nor closer than 30 inches (762 mm) center to center to
a similar fixture. The clear space in front of a water closet,
lavatory, or bidet shall be not less than 24 inches (610 mm). No
urinal shall be set closer than 12 inches (305 mm) from its center
to a side wall or partition nor closer than 24 inches (610 mm)
center to center. Exception: The installation of paper dispensers
or accessibility grab bars shall not be considered obstructions.
SUBSTANTIATION: The UPC is silent on providing direction to an
installer or an inspector for the proper setting of a lavatory.
Provisions should be included for lavatories that are consistent
with industry standards and practices. TASK GROUP ACTION: Forward
to Technical Committee TASK GROUP STATEMENT: The proposed
requirements would restrict corner lavatories, and therefore is too
restrictive. Item #29 RECOMMENDATION: Add new text as follows:
407.5 Footbaths and Shampoo Sinks. Hot water delivered to public
footbaths or shampoo sinks shall be limited to a maximum
temperature of 120F (49C) by a device that is listed in accordance
with ASSE 1070 or CSA B125.3. The water heater thermostat shall not
be considered a control for meeting this provision. SUBSTANTIATION:
The UPC does not provide provisions for safeguarding the public
from scalding where footbaths or shampoo sinks are used. TASK GROUP
ACTION: Accept as Modified 407.5 Footbaths and Shampoo Sinks. Hot
water delivered to public footbaths or shampoo sinks shall be
limited to a maximum temperature of 120F (49C) by a device that is
listed in accordance with ASSE 1070 or CSA B125.3. The water heater
thermostat shall not be considered a control for meeting this
provision.
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16
Item #30 RECOMMENDATION: Revise text as follows: 408.4 Waste
Outlet. Showers shall have a waste outlet and fixture tailpiece not
less than 2 inches (50 mm) 11/2 inches (40 mm) in diameter. Fixture
tailpieces shall be constructed from the materials specified in
Section 701.1 for drainage piping. Strainers serving shower drains
shall have a waterway at least equivalent to the area of the
tailpiece.
TABLE 702.1 DRAINAGE FIXTURE UNIT VALUES (DFU)
PLUMBING APPLIANCES, APPURTENANCES, OR FIXTURES
MINIMUM SIZE TRAP AND TRAP ARM7
(inches) PRIVATE PUBLIC ASSEMBLY8
Shower, single-head trap 2 11/2 2.0 2.0 2.0 Multi-head, each
additional 2 11/2 1.0 1.0 1.0 (portions of table not shown remain
unchanged) SUBSTANTIATION: 1. It is illogical for the UPC to permit
a combination tub/shower to have a minimum 11/2 inch diameter
tailpiece, while requiring a shower to have a minimum 2 inch
diameter tailpiece. Both fixtures have showerheads that provide a
maximum flow rate of 2.5 gpm at 80 psi in accordance with ASME
A112.18.1/CSA B125.1. Both fixtures should have the same size
tailpiece.
2. With low flow fixtures, a 11/2 inch versus 2 inch diameter
pipe permits better scouring within the drainage piping system, and
therefore a reduction in the number of clogs that can occur.
TASK GROUP ACTION: Forward to Technical Committee TASK GROUP
STATEMENT: The reason that a 11/2 inch trap works for a tub/shower
combo, and not a shower, is that a tub/shower combo generally has a
overflow that prevents water from spilling over the top of the
fixture. Furthermore, it is extremely difficult to clean hair out
of a 1 inch shower trap. Item #31 RECOMMENDATION: Revise text as
follows: 408.7.1 Tests for Shower Receptors. Shower receptors shall
be tested for watertightness by filling with water to the level of
the rough threshold. Where a threshold does not exist, a temporary
threshold of not less than 2 inches (51 mm) in depth shall be
constructed in accordance with the Authority Having Jurisdiction.
The test plug shall be so placed that both upper and under sides of
the subpan shall be subjected to the test at the point where it is
clamped to the drain. SUBSTANTIATION: Since the 2012 Uniform
Plumbing Code no longer requires a threshold to be installed for
showers (refer to Section 408.5), provisions are necessary for an
installer or inspector to be able to test the watertightness of a
shower receptor with a liner when a permanent threshold is not
present. The construction of such a threshold should be left up to
the approval of the AHJ. TASK GROUP ACTION: Forward to Technical
Committee TASK GROUP STATEMENT: There is no practical method to
consistently implement the proposed language in the field. The
proposed language could create inconsistency and confusion within
the enforcement community.
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17
Item #32 RECOMMENDATION: Revise text as follows: 417.2 Deck
Mounted Bath/Shower Valves. Deck mounted bath/shower transfer
valves with integral backflow protection shall comply be listed in
accordance with ASME A112.18.7 ASME A112.18.1/CSA B125.1. This
shall include hand held showers and other bathing appliances
mounted on the deck of bathtubs or other bathing appliances that
incorporate a hose or pull out feature. SUBSTANTIATION: ASME
A112.18.7 is no longer published by ASME, and has been replaced
with ASME A112.18.1/CSA B125.1 beginning February 2012. TASK GROUP
ACTION: Accept as Submitted Item #33 RECOMMENDATION: Revise text as
follows: 417.5 Separate Controls for Hot and Cold Water. Where two
separate handles control the hot and cold water, the left-hand
control of the faucet where facing the fixture fitting outlet shall
control the hot water. Faucets and diverters shall be connected to
the water distribution system so that hot water corresponds to the
left side of the fixture fittings.
Single-handle mixing valves used in showers and tub-shower
combinations shall have the flow of hot water correspond to the
markings on the fixture fitting. 208.0 Fixture Fitting. A fitting
used to control the volume of water, the flow direction of water,
or both to a fixture. SUBSTANTIATION: 1. The last sentence of
Section 417.5 has been misinterpreted by various jurisdictions to
prohibit single
handle kitchen or lavatory faucets from being used that are not
marked hot and cold on the actual faucet. This was not the intent
of the original proponent (PMI) that submitted this code language.
The original intent of the proponent was to protect an individual
in a shower or combination tub/shower from scalding and thermal
shock.
2. The term mixing valve is only used in the UPC in regards to
pressure balance, thermostatic, or combination pressure
balance/thermostatic mixing valves used in showers and tub-shower
combinations. The term is not applicable to kitchen or lavatory
faucets.
3. The applicable standard used throughout the industry for
plumbing supply fittings (ASME A112.18.1) only requires temperature
markings to be indicated on mixing valves used in showers and
tub-shower combinations. No where within the standard does it
indicate that a kitchen or lavatory faucet needs to have
temperature markings. For informational purposes only, Section 6.2
of ASME A112.18.1 is shown as follows: Section 6.2 (Temperature
identification): Single-handle, single-control, and automatic
compensating mixing bath and shower valves shall have identifiable
temperature control settings in which the setting are indicated by
words (cold, warm, hot, etc.) by numbers, or graphically.
4. The term fixture fitting is used not only in Section 417.5,
but Sections 402.10, 417.1, 417.4, 421.0, 603.5.20, 608.1, L 402.1,
and L 801.0 without being defined. The proposed definition assists
the end user in applying and enforcing this term. The revisions
being proposed throughout Section 417.5 to change fitting to
fixture fitting is consistent with the intent of the section and
the new definition.
TASK GROUP ACTION: Accept as Submitted
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18
Item #34 RECOMMENDATION: Revise text as follows: 414.3 Drainage
Connection. Domestic dishwashing machines shall discharge
indirectly through an air gap fitting in accordance with Section
807.4 into a waste receptor, a wye branch fitting on the tailpiece
of a kitchen sink, or dishwasher connection of a food waste grinder
disposer. Commercial dishwashing machines shall discharge
indirectly through an air gap or direct connection in accordance
with Section 704.3 with floor drain protection. 419.0 Food Waste
Disposal Units Disposers. 419.1 Application. Food waste disposal
units disposers shall comply with the applicable standards
referenced in Table 1401.1. 419.2 Drainage Connection. Approved wye
or other directional-type branch fittings shall be installed in
continuous wastes connecting or receiving the discharge from a food
waste disposal unit disposer. No dishwasher drain shall be
connected to a sink tailpiece, continuous waste, or trap on the
discharge side of a food waste disposal unit disposer. 419.3 Water
Supply. A cold water supply shall be provided for food waste
disposal unit disposers. Such connection to the water supply shall
be protected by an air gap or backflow prevention device in
accordance with Section 603.2.
TABLE 702.1 DRAINAGE FIXTURE UNIT VALUES (DFU)
PLUMBING APPLIANCES, APPURTENANCES, OR FIXTURES
MINIMUM SIZE TRAP AND TRAP ARM7
(inches) PRIVATE PUBLIC ASSEMBLY8
Food Waste Grinder Disposer, commercial 2 - 3.0 3.0 Kitchen,
domestic2 (with or without food waste grinder disposer, dishwasher,
or both)
11/2 2.0 2.0 -
(portions of table not shown remain unchanged) 714.4 Commercial
Food Waste Grinder Disposer. The Authority Having Jurisdiction
shall review before approval, the installation of a commercial food
waste grinder disposer connecting to a private sewage disposal
system. 1001.1 Where Required. Each plumbing fixture, shall be
separately trapped by an approved type of liquid seal trap. This
section shall not apply to fixtures with integral traps. Not more
than one trap shall be permitted on a trap arm. Food waste disposal
units disposers installed with a set of restaurant, commercial, or
industrial sinks shall be connected to a separate trap. Each
domestic clothes washer and each laundry tub shall be connected to
a separate and independent trap, except that a trap serving a
laundry tub shall be permitted to also receive the waste from a
clothes washer set adjacent thereto. The vertical distance between
a fixture outlet and the trap weir shall be as short as
practicable, but in no case shall the tailpiece from a fixture
exceed 24 inches (610 mm) in length. One trap shall be permitted to
serve a set of not more than three single compartment sinks or
laundry tubs of the same depth or three lavatories immediately
adjacent to each other and in the same room where the waste outlets
are not more than 30 inches (762 mm) apart and the trap is
centrally located where three compartments are installed. 1014.1.3
Food Waste Disposal Units Disposers and Dishwashers. Unless
specifically required or permitted by the Authority Having
Jurisdiction, no food waste disposal unit disposer or dishwasher
shall be connected to or discharge into a grease interceptor.
Commercial food waste disposers shall be permitted to discharge
directly into the buildings drainage system.
TABLE H 2.1
CAPACITY OF SEPTIC TANKS1, 2, 3, 4 (portions of table not shown
remain unchanged)
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19
Notes: Footnotes 1 3 (remaining text unchanged) 4 Septic tank
sizes in this table include sludge storage capacity and the
connection of domestic food waste disposal units
disposers without further volume increase. SUBSTANTIATION: The
correct term used within the plumbing industry is food waste
disposer, and not food waste grinder or food waste disposal unit.
This change also correlates the UPC with the terminology used in
the applicable referenced standards listed in Table 1401.1 (AHAM
FWD-1, ASSE 1008, and IAPMO PS 113). TASK GROUP ACTION: Accept as
Submitted Item #35 RECOMMENDATION: Revise text as follows 403.5
420.3 Pre-Rinse Spray Valve. Commercial food service pre-rinse
spray valves shall have a maximum flow rate of 1.6 gallons per
minute (gpm) at 60 pounds-force per square inch (psi) (0.10 L/s at
414 kPa) in accordance with ASME A112.18.1/CSA B125.1 and shall be
equipped with an integral automatic shutoff. (renumber remaining
sections) SUBSTANTIATION: Provisions for pre-rinse spray valves
should be located under Section 420.0 (Sinks) for ease of
application and enforcement. TASK GROUP ACTION: Accept as Submitted
Item #36 RECOMMENDATION: Revise text as follows 422.4.1 Access to
Toilet Facilities. In multi-story buildings, accessibility to the
required toilet facilities shall not exceed one vertical story.
Access to the required toilet facilities for customers shall not
pass through areas designated as for employee use only such as
kitchens, food preparation areas, storage rooms, closets, or
similar spaces. A toilet facility shall not open into a room or
space used for food preparation. Toilet facilities accessible only
to private offices shall not be counted to determine compliance
with this section. SUBSTANTIATION: The revision to Section 422.4.1
is necessary in order to keep rooms or areas used for food
preparation in a sanitary condition. TASK GROUP ACTION: Forward to
Technical Committee TASK GROUP STATEMENT: The proposed language is
too restrictive and is considered an architectural issue that is
outside the scope of the plumbing code.
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20
Item #37 RECOMMENDATION: Revise text as follows
TABLE 422.1 MINIMUM PLUMBING FACILITIES1 (continued)
TYPE OF OCCUPANCY
2
WATER CLOSETS (FIXTURES PER
PERSON)3
URINALS (FIXTURES PER
PERSON)4
LAVATORIES (FIXTURES PER
PERSON)5
BATHTUBS OR SHOWERS
(FIXTURES PER PERSON)
DRINKING FOUNTAINS /FACILITIES (FIXTURES
PER PERSON) OTHER
(portions of table not shown remain unchanged) Notes: (Footnotes
1 - 3 remain unchanged) 4 For each urinal added in excess of the
minimum required, one water closet shall be permitted to be
deducted. The number of
water closets shall not be reduced to less than two-thirds of
the minimum requirement. 5 Group lavatories that are 24 lineal
inches (610 mm) of wash sink or 18 inches (457 mm) of a circular
basin, where provided
with water outlets for such space, shall be considered
equivalent to one lavatory. SUBSTANTIATION: 1. The provisions for
the substitution of urinals for water closets was in the 2009 UPC
as footnote #5 of
Table 4-1, and should have been brought forward in the 2012 UPC
with the revisions made to Table 422.1. It is common industry
practice to permit a certain percentage of water closets to be
substituted with urinals in male toilet facilities to conserve
space.
2. The provisions for group lavatories was in the 2009 UPC as
footnote #8 of Table 4-1, and should have been brought forward in
the 2012 UPC with the revisions made to Table 422.1. This design
option is common in outdoor assembly, factory, and industry
occupancies, but is not limited to such occupancies.
TASK GROUP ACTION: Accept as Submitted Item #38 RECOMMENDATION:
Revise text as follows 507.4 Drainage Pan. Where a water heater is
located in an attic, in or on an attic-ceiling assembly,
floor-ceiling assembly, or floor-subfloor assembly where damage
results from a leaking water heater, a watertight pan of
corrosion-resistant materials shall be installed beneath the water
heater with not less than 34 of an inch (20 mm) diameter drain to
an approved location. Such pan shall be not less than 11/2 inches
(38 mm) in depth and of a size and shape in accordance with the
manufacturers installation instructions. SUBSTANTIATION: 1. The
current language does not clearly address installations on an
attic-ceiling assembly, floor-ceiling
assembly, or floor-subfloor assembly which is the intent of this
section of code, and has caused confusion within the industry in
regards to the application and enforcement of this section.
2. The depth of the pan is important for ensuring that enough
space is provided for the drain connection fitting generally
located on the side of the pan.
TASK GROUP ACTION: Accept as Modified 507.4 Drainage Pan. Where
a water heater is located in an attic, in or on an attic-ceiling
assembly, floor-ceiling assembly, or floor-subfloor assembly where
damage results from a leaking water heater, a watertight pan of
corrosion-resistant materials shall be installed beneath the water
heater with not less than 34 of an inch (20 mm) diameter drain to
an
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21
approved location. Such pan shall be not less than 11/2 inches
(38 mm) in depth and of a size and shape in accordance with the
manufacturers installation instructions. Item #39 RECOMMENDATION:
Revise text as follows 507.5 Relief Valve Discharge. Discharge from
a relief valve into a water heater pan shall be prohibited. Relief
valves shall be discharged in accordance with Section 608.5.
SUBSTANTIATION: The additional language is needed to assist the end
user in locating the provisions in Section 608.5 that address the
proper discharge of a relief valve drain pipe. TASK GROUP ACTION:
Accept as Submitted Item #40 RECOMMENDATION: Delete text without
substitution: 511.0 Direct-Vent Appliances. 511.1 General. Listed
direct-vent appliances shall be considered properly vented where
installed in accordance with the terms of its listing, the
manufacturers instructions, and Section 509.8.2. [NFPA 54:12.3.5]
SUBSTANTIATION: The provisions of Sections 511.0 & 511.1 are
already stated in Section 509.2.4 (Direct-Vent Appliances), and
therefore redundant. For informational purposes only, Section
509.2.4 (Direct-Vent Appliances) is shown as follows: Listed
direct-vent appliances shall be installed in accordance with the
manufacturers installation instructions and Section 509.8.2. [NFPA
54:12.3.5] TASK GROUP ACTION: Accept as Submitted Item #41
RECOMMENDATION: Revise text as follows 603.2 Approval of Devices or
Assemblies. Before a device or an assembly is installed for the
prevention of backflow, it shall have first been approved by the
Authority Having Jurisdiction. Devices or assemblies shall be
tested in accordance with recognized standards or other standards
acceptable to the Authority Having Jurisdiction. Backflow
prevention devices and assemblies shall comply with Table 603.2,
except for specific applications and provisions as stated in
Section 603.5.1 through Section 603.5.21.
Devices or assemblies installed in a potable water supply system
for protection against backflow shall be maintained in good working
condition by the person or persons having control of such devices
or assemblies. Such devices or assemblies shall be tested at the
time of installation, repair, or relocation and not less than on an
annual schedule thereafter, or more often where required by the
Authority Having Jurisdiction. Where found to be defective or
inoperative, the device or assembly shall be repaired or replaced.
No device or assembly shall be removed from use or relocated or
other device or assembly substituted, without the approval of the
Authority Having Jurisdiction.
Testing or maintenance shall be performed by a certified
backflow assembly tester or repairer in accordance with ASSE Series
5000 or otherwise approved by the Authority Having
Jurisdiction.
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SUBSTANTIATION: ASSE Series 5000 provides provisions for both
testing and maintenance of backflow devices, and should be
addressed within the UPC. Furthermore, ASSE Series 5000 not only
addresses certification requirements for testers, but repairers as
well. This revision will provide clarity that both testers and
repairers that are certified to ASSE Series 5000 are permitted to
test backflow devices and assemblies in accordance with this code.
TASK GROUP ACTION: Accept as Submitted Item #42 RECOMMENDATION:
Revise text as follows 603.4.9 Prohibited Locations. Backflow
prevention devices with atmospheric vents or ports shall not be
installed in pits, underground, or submerged locations. 603.5.13
Prohibited Location. Backflow preventers shall not be located in an
area containing fumes that are toxic, poisonous, or corrosive.
SUBSTANTIATION: Section 603.5.13 should be combined with Section
603.4.9 so that all requirements pertaining to prohibited locations
for backflow prevention devices are located in one section of code
for ease of use. TASK GROUP ACTION: Accept as Submitted Item #43
RECOMMENDATION: Delete text without substitution:
TABLE 604.1 MATERIALS FOR BUILDING SUPPLY AND WATER DISTRIBUTION
PIPING AND FITTINGS
MATERIAL BUILDING SUPPLY PIPE AND FITTINGS WATER DISTRIBUTION
PIPE
AND FITTINGS REFERENCED
STANDARD(S) PIPE REFERENCED
STANDARD(S) FITTINGS Asbestos-Cement X* ASTM C 296 (portions of
table not shown remain unchanged) 605.1 Asbestos-Cement Pipe and
Joints. Joining methods for asbestos-cement pipe and fittings shall
be installed in accordance with the manufacturers installation
instructions and shall comply with Section 605.1.1. 605.1.1
Mechanical Joints. Mechanical joints shall be of the same
composition as the pipe and sealed with an approved elastomeric
gasket or joined by a listed compression type coupling. Elastomeric
gaskets shall comply with ASTM D 1869. The coupling grooves, pipe
ends, and elastomeric gaskets shall be cleaned. Elastomeric gaskets
shall be positioned in the grooves. Lubricant recommended for
potable water application by the pipe manufacturer shall be applied
to the machined end of the pipe. Lubricant shall not be applied to
the elastomeric gasket or groove, unless specifically recommended
by the manufacturer. (renumber remaining text accordingly)
TABLE 701.1 MATERIALS FOR DRAIN, WASTE, VENT PIPE AND
FITTINGS
MATERIAL UNDERGROUND DRAIN,
WASTE, VENT PIPE AND FITTINGS
ABOVEGROUND DRAIN, WASTE, VENT PIPE
AND FITTINGS
BUILDING SEWER PIPE AND FITTINGS
REFERENCED STANDARD(S) PIPE
REFERENCED STANDARD(S)
FITTINGS Asbestos-Cement X ASTM C 14*, ASTM C 428*
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(portions of table not shown remain unchanged) 705.2
Asbestos-Cement Pipe and Joints. Joining methods for
asbestos-cement pipe and fittings shall be installed in accordance
with the manufacturers installation instructions and shall comply
with Section 705.2.1. 705.2.1 Mechanical Joints. Mechanical joints
shall be of the same composition as the pipe and sealed with an
approved elastomeric gasket or joined by a listed compression type
coupling. Elastomeric gaskets shall comply with ASTM D 1869. The
coupling grooves, pipe ends, and elastomeric gaskets shall be
cleaned. Elastomeric gaskets shall be positioned in the grooves.
Lubricant recommended by the manufacturer shall be applied to the
machined end of the pipe. Lubricant shall not be applied to the
elastomeric gasket or groove, unless specifically recommended by
the manufacturer.
TABLE 1102.5 MATERIALS FOR SUBSOIL DRAIN PIPE AND FITTINGS
MATERIAL REFERENCED STANDARD(S)
Asbestos Cement ASTM C 444, ASTM C 508 ASTM C 966 (portions of
table not shown remain unchanged) SUBSTANTIATION: Asbestos-cement
piping is no longer manufactured in North America. Furthermore, the
potential health issues associated with this material makes it
unsafe for most water supply and drainage applications. This
proposed change recommends that asbestos-cement piping be removed
from the UPC. If for some reason an individual wanted to use this
piping material they could always do so in accordance with Section
301.2 (Alternate Materials and Methods of Construction
Equivalency). TASK GROUP ACTION: Accept as Submitted Item #44
RECOMMENDATION: Revise text as follows: 604.4 Flexible Copper
Connectors. Listed flexible copper water connectors shall be
installed in readily accessible locations, unless otherwise listed.
SUBSTANTIATION: Whether a flexible water connector is copper or any
other type of material (unless otherwise listed) it should be
installed in a readily accessible location for maintenance
purposes. TASK GROUP ACTION: Accept as Submitted Item #45
RECOMMENDATION: Revise text as follows: 604.11 Lead Content. Water
pipe and fittings with a lead content which exceeds 8 percent shall
be prohibited in piping systems used to convey potable water. The
maximum allowable lead content in pipes and pipe fittings, plumbing
fittings, and fixtures intended to convey or dispense water for
human consumption shall be a weighted average of 0.25 percent with
respect to the wetted surfaces of pipes and pipe fittings, plumbing
fittings, and fixtures.
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SUBSTANTIATION: This revision brings the UPC in accordance with
the latest revisions made to the Safe Water Drinking Act that go
into effect on January 4, 2014. TASK GROUP ACTION: Accept as
Submitted Item #46 RECOMMENDATION: Revise text as follows 606.0
Valves. 606.1 General. Valves up to and including 2 inches (50 mm)
in size shall be brass or other approved material. Sizes exceeding
2 inches (50 mm) shall be permitted to have cast-iron or brass
bodies. Each gate or ball valve shall be a fullway type with
working parts of non-corrosive material. Valves carrying water used
in potable water systems intended to supply drinking water shall be
in accordance with the requirements of NSF 61 as referenced in
Table 1401.1. 606.6 Accessible. Required fullway or shutoff or
control valves shall be accessible. 606.2 Fullway Valves. A fullway
valve controlling outlets shall be installed on the discharge side
of each water meter and on each unmetered water supply. Water
piping supplying more than one building on one premises shall be
equipped with a separate fullway valve to each building, so
arranged that the water supply can be turned on or off to an
individual or separate building provided; however, that supply
piping to a single-family residence and building accessory thereto
shall be permitted to be controlled on one valve. Such shutoff
valves shall be accessible. A fullway valve shall be installed on
the discharge piping from water supply tanks at or near the tank. A
fullway valve shall be installed on the cold water supply pipe to
each water heater at or near the water heater. 606.4 Multiple
Openings. Valves used to control two or more openings shall be
fullway gate valves, ball valves, or other approved valves designed
and approved for the service intended. 606.5 Control 606.3 Shutoff
Valves. A control shutoff valve shall be installed immediately
ahead of each water-supplied appliance, and immediately ahead of
each slip joint, or appliance supply; 606.7 Multiple Fixtures. A
single control valve shall be installed on a water supply line
ahead of an automatic metering valve that supplies to each a
fixture (excluding bathtubs or showers) or battery of fixtures; and
Parallel water distribution systems shall provide a control valve
either immediately ahead of each fixture being supplied or
installed at the manifold of a parallel water distribution system,
and shall be identified with the fixture being supplied. 606.3
Multidwelling Units. In multidwelling units, one or more shutoff
valves shall be provided in each dwelling unit so that the water
supply to a plumbing fixture or group of fixtures in that dwelling
unit can be shut off without stopping water supply to fixtures in
other dwelling units. These valves shall be accessible in the
dwelling unit that they control. SUBSTANTIATION: 1. This code
proposal attempts to reorganize this section of code into a more
logical order for ease of
application and enforcement, and to clarify the appropriate type
of valve to be used based on the application to ensure proper
installation and enforcement of the code. A fullway valve (gate or
ball valve) is designed to be used where obstruction of flow is not
desired such as the water service to the building. A shutoff valve,
and not a control valve, should be used for isolating appliances,
fixtures, etc. for service or repair.
2. Former Section 606.6 (Accessible) should be combined with
Section 606.1 (General) as accessible requirements apply to both
fullway and shutoff valves.
3. In Section 606.2 (Fullway Valves), the text Such shutoff
valves shall be accessible should be deleted as this section of
code deals with fullway valves, and not shutoff valves.
4. In former Section 606.4 (Multiple Openings), it is not
necessary to state fullway gate valves, ball valves as the second
sentence of Section 606.1 (General) already states Each gate or
ball valve shall be a fullway type. Therefore, such text is
redundant.
5. The text ahead of an automatic metering valve should be
deleted because it should not matter whether or not an automatic
metering valve is installed as a shutoff valve should be installed
on the supply to each fixture (except tubs and showers) or battery
of fixtures in case of a repair or a replacement. Tubs and showers
are excluded from the shutoff valve requirements, unless installed
at
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25
the manifold of a parallel water distribution system, as it
would be quite difficult to make such valves accessible at the
fixtures.
6. Former Section 606.3 (Multidwelling Units) should be combined
with new Section 606.3 (Shutoff Valves) since this section applies
to the installation of shutoff valves in all types of occupancies
including multidwelling units.
TASK GROUP ACTION: Forward to Technical Committee TASK GROUP
STATEMENT: Control valves should be called supply stops, and not
shutoff valves in accordance with ASME A112.18.1. Proposed
revisions to Section 606.3 would also remove language that is
necessary for the installation of valves. Item #47 RECOMMENDATION:
Revise text as follows 607.0 Gravity Potable Water Supply Tanks.
607.1 General. Potable water supply tanks shall be installed in
accordance with the manufacturers installation instructions, and
supported in accordance with the building code. 607.2 Potable Water
Tanks. Potable water supply tanks, interior tank coatings, or tank
liners intended to supply drinking water shall be in accordance
with NSF 61. 607.1 General 607.3 Venting. Gravity tTanks used for
potable water shall be tightly covered, and vented in accordance
with the manufacturers installation instructions. Such vent shall
be screened with a corrosion-resistant material of not less than
number 24 mesh. 607.4 Overflow. Tanks shall have not less than a 16
square inch (0.01 m2) overflow that is screened with copper screen
a corrosion-resistant material of not less than number 24 mesh.
having not less than 14 nor exceeding 18 openings per linear inch
(25.4 mm) 607.5 Valves. Pressurized tanks shall be provided with a
listed pressure-relief valve installed in accordance with the
manufacturers installation instructions. The relief valve shall be
discharged in accordance with Section 608.5. Where a potable water
supply tank is located above the fixtures, appliances, or system
components it serves it shall be equipped with an approved vacuum
relief valve. SUBSTANTIATION: 1. Section 607.0 has been reorganized
in a more logical order for ease of application and enforcement. 2.
This section currently addresses gravity supply tanks, but is
silent on those tanks that utilize a pump.
Therefore, the terminology within this section of code should be
revised accordingly to address both types of tanks.
3. Currently the UPC lacks direction to the end user on how to
install gravity supply tanks. Furthermore, the building code should
be referenced for the support of a water tank since the full weight
of tank must be considered when calculating dead loads when
designing a structure.
4. The first part of former Section 607.1 (General) has been
relocated to new Section 607.3 (Cover). It is important for a tank
to be vented to prevent pressures from developing in the tank as a
result of water being pumped into or withdrawn from the tank. The
vent of a tank should be screened to prevent the entrance of debris
and vermin. The mesh size is based on Section E 62.0 (Storage
Tanks) that addresses storage tanks used in recreational vehicle
parks.
5. New Section 607.4 (Overflow) should be revised to account for
other types of approved screening material besides copper.
6. Since pressurized tanks are connected to pumping equipment,
it is possible that the pressure rating of the tank could be
exceeded. Therefore, to protect the tank from possible rupture or
failure an approved pressure-relief valve should be installed.
7. Where a tank is located at an elevation above the system
components, a vacuum relief valve is necessary to prevent
atmospheric pressure from damaging the tank.
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TASK GROUP ACTION: Accept as Submitted Item #48 RECOMMENDATION:
Revise text as follows 608.3 Expansion Tanks, Combination Pressure,
and Temperature Relief Valves. A water system provided with a check
valve, backflow preventer, or other normally closed device that
prevents dissipation of building pressure back into the water main,
regardless of the type of water heater that is installed, shall be
provided with an approved, listed, and adequately sized expansion
tank or other approved device having a similar function to control
thermal expansion. Such expansion tank or other approved device
shall be installed on the building side of the check valve,
backflow preventer, or other device and shall be sized and
installed in accordance with the manufacturers installation
instructions.
A water system containing storage water heating equipment shall
be provided with an approved, listed, adequately sized combination
pressure and temperature relief valve, except for listed nonstorage
instantaneous heaters having an inside diameter of not more than 3
inches (80 mm). Each such approved combination temperature and
pressure relief valve shall be installed on the water-heating
device in an approved location based on its listing requirements
and the manufacturers installation instructions. Each such
combination temperature and pressure relief valve shall be provided
with a drain in accordance with Section 608.5. SUBSTANTIATION:
There is a misunderstanding throughout the industry that if a
tankless water heater is installed, an expansion tank is not
necessary; this is not true. The above revision clarifies that
regardless the type of water heater that is installed thermal
expansion can still occur in the cold water supply line. Therefore,
an approved expansion tank or other approved device needs to be
installed. TASK GROUP ACTION: Accept as Modified 608.3 Expansion
Tanks, Combination Pressure, and Temperature and Pressure Relief
Valves. A water system provided with a check valve, backflow
preventer, or other normally closed device that prevents
dissipation of building pressure back into the water main,
regardless of the type of water heater that is installed
independent of the type of water heater used, shall be provided
with an approved, listed, and adequately sized expansion tank or
other approved device having a similar function to control thermal
expansion. Such expansion tank or other approved device shall be
installed on the building side of the check valve, backflow
preventer, or other device and shall be sized and installed in
accordance with the manufacturers installation instructions.
A water system containing storage water heating equipment shall
be provided with an approved, listed, adequately sized combination
pressure and temperature relief valve, except for listed nonstorage
instantaneous heaters having an inside diameter of not more than 3
inches (80 mm). Each such approved combination temperature and
pressure relief valve shall be installed on the water-heating
device in an approved location based on its listing requirements
and the manufacturers installation instructions. Each such
combination temperature and pressure relief valve shall be provided
with a drain in accordance with Section 608.5. Item #49
RECOMMENDATION: Revise text as follows: 613.0 610.4 Parallel
Distribution Systems. Systems within the range of Table 610.4 shall
be permitted to be sized from that table or by the method in
accordance with Section 610.5. Listed parallel water distribution
systems shall be installed in accordance with their listing, but at
no time shall a portion of the system exceed the maximum velocities
allowed by the code.
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613.1 General. Parallel distribution systems for plastic tubing
shall be listed and installed in accordance with the manufacturers
installation instructions. Manifolds shall be accessible where
incorporating removable tubing connections or valves. 613.2 Valves.
Individual fixture shutoff valves shall be installed in accordance
with Section 606.5. 613.3 Installation. Tubing shall be not less
than 12 inches (305 mm) vertically or 6 inches (152 mm)
horizontally from sources of high heat unless protected by
insulation or other approved method. Tubing shall be installed to
permit expansion and contraction. Water distribution piping shall
be permitted to be bundled together provided hot and cold water
lines are separated by insulation and permit movement. 613.4
Sizing. Hot and cold water manifolds shall be sized in accordance
with Table 613.4. Individual water distribution piping shall be
sized in accordance with Table 613.4(1).
TABLE 613.4 MANIFOLD SIZING
MAXIMUM DEMAND (gallons per minute) INTERNAL DIAMETER
(inches) VELOCITY at 4 feet per second VELOCITY at 8 feet per
second
1/2 2 5 6 11 1 10 20
11/4 15 31 11/2 22 44 2 27 54
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s, 1
foot per second = 0.3048 m/s
TABLE 613.4(1)
MINIMUM SIZES OF INDIVIDUAL WATER DISTRIBUTION PIPING FOR
PARALLEL DISTRIBUTION FIXTURE MINIMUM PIPE SIZE (inches)
Bathtub or Combination Bath/Shower 1/2 Bidet 1/2 Clothes Washer
1/2 Lavatory 1/2 Sinks
Kitchen, domestic 1/2 Laundry 1/2 Service or Mop Basin 1/2
Shower, per head 1/2 Urinal, 1.0 GPF Flushometer Valve 3/4
Urinal, Flush Tank 1/2 Water Closet, 1.6 GPF Gravity Tank 1/2 Water
Closet, 1.6 GPF Flushometer Tank 1/2 Water Closet, 1.6 GPF
Flushometer Valve 3/4 For SI units: 1 inch = 25 mm SUBSTANTIATION:
1. During the 2012 UPC Code Cycle, the TC rejected a similar
proposal as they felt such provisions
could eliminate the use of copper systems due to the valve
requirements. To address the issues of the TC, the proposed
language only pertains to plastic tubing and references existing
valve requirements located in Section 606.5. Therefore, there
should be no impact on copper systems.
2. The bottom line is that the UPC provides very little in the
way of installation and sizing requirements for parallel water
distribution systems. For one, the UPC does not address the
installation of water distribution piping where exposed to sources
of high heat, such as recessed light fixtures, flue gas vents, or
heating appliances. Keeping tubing a minimum of 12 inches
vertically or 6 inches horizontally away from sources of high heat
is common practice when installing plastic tubing. Additionally,
the UPC currently permits such systems to be sized in accordance
with Table 610.4 which is incorrect as such systems are sized based
on maximum demand measured in gallons per
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minute, and not fixture units. The values provided in Table
613.4 do not conflict with the maximum velocities outlined in
Section 610.12, and are based on industry standards.
TASK GROUP ACTION: Forward to Technical Committee TASK GROUP
STATEMENT: The velocity column for 4 feet per second in Table 613.4
conflicts with Section 610.12.2 where 5 feet per second is
indicated for hot water. Additionally, the term high heat in
Section 613.3 needs to be defined. Item #50 RECOMMENDATION: Revise
text as follows 703.0 Size of Drainage Piping. 703.1 Minimum Size.
The minimum sizes of vertical, horizontal, or both drainage piping
shall be determined from the total of fixture units connected
thereto, and additionally, in the case of vertical drainage pipes,
in accordance with their length. 703.2 Maximum Number of Fixture
Units. Table 703.2 shows the maximum number of fixture units
allowed on a vertical or horizontal drainage pipe, building drain,
or building sewer of a given size; the maximum number of fixture
units allowed on a branch interval of a given size; and the maximum
length (in feet and (meters) of a vertical drainage pipe of a given
size. Where a multistory or engineered system design is present, a
drainage system shall be permitted to be sized in accordance with
Section 704.0. A vent system shall be permitted to be sized in
accordance with Section 905.0. 703.3 Sizing per Appendix C. For
alternate method of sizing drainage piping, see Appendix C. C 5.0
704.0 Alternate Method for Drainage System Sizing. 704.1 General.
Drainage piping shall be sized in accordance with Section 704.2 and
Section 704.3. C 5.2 Drainage Fixture Units. Drainage fixture unit
values shall be sized in accordance with Table 702.1 and Section
702.0. C 5.3 704.2 Size of Building Drain and Building Sewer. The
maximum number of drainage fixture units allowed on the building
drain or building sewer of a given size shall be in accordance with
Table C 5.3 704.2. The size of a building drain or building sewer
serving a water closet shall be not less than 3 inches (80 mm).
TABLE C 5.3 704.2 BUILDING DRAINS AND BUILDING SEWERS1
MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS FOR SANITARY BUILDING
DRAINS AND RUNOUTS FROM STACKS
SLOPE (inches per foot) DIAMETER OF PIPE
(inches) 1/16 1/8 1/2
2 - - 21 26 21/2 - - 24 31 3 - 20 422 502 4 - 180 216 250 5 -
390 480 575 6 - 700 840 1000 8 1400 1600 1920 2300 10 2500 2900
3500 4200 12 2900 4600 5600 6700 15 7000 8300 10 000 12 000
For SI units: 1 inch = 25 mm, 1 inch per foot = 83.3 mm/m Notes:
1 On-site sewers that serve more than one building shall be
permitted to be sized according to the current standards and
specifications of the
administrative authority for public sewers. 2 A maximum of two
water closets or two bathroom groups, except in single-family
dwellings, where a maximum of three water closets or
three bathroom groups shall be permitted to be installed.
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C 5.4 704.3 Size of Horizontal Branch or Vertical Stack. The
maximum number of drainage fixture units allowed on a horizontal
branch or vertical soil or waste stack of a given size shall be in
accordance with Table C 5.4 704.3. Stacks shall be sized based on
the total accumulated connected load at each story or branch
interval. C 5.4.1 704.3.1 Horizontal Stack Offsets. Horizontal
stack offsets shall be sized in accordance with Table C 5.3 704.2
as required for building drains. C 5.4.2 704.3.2 Vertical Stack
Offsets. Vertical stack offsets shall be sized in accordance with
Table C 5.4 704.3 as required for stacks.
TABLE C 5.4 704.3 HORIZONTAL FIXTURE BRANCHES AND STACKS
MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS STACKS WITH MORE THAN
THREE BRANCH INTERVALS
DIAMETER OF PIPE (inches)
HORIZONTAL FIXTURE BRANCH1
ONE STACK OF THREE OR FEWER BRANCH
INTERVALS TOTAL FOR STACK TOTAL AT ONE BRANCH
INTERVAL 11/2 3 4 8 2 2 6 10 24 6
21/2 12 20 42 9 3 202 482 722 202 4 160 240 500 90 5 360 540
1100 200 6 620 960 1900 350 8 1400 2200 3600 600 10 2500 3800 5600
1000 12 3900 6000 8400 1500 15 7000 6000 8400 1500
For SI units: 1 inch = 25 mm Notes: 1 Does not include branches
of the building drain. 2 A maximum of two water closets or bathroom
groups within each branch interval or more than six water closets
or bathroom groups on the
stack. C 5.5 704.4 Horizontal Stack Offset and Horizontal Branch
Connections. Horizontal branch connections shall not connect to a
horizontal stack offset or within 2 feet (610 mm) above or below
the offset where such horizontal offset is located more than four
branch intervals below the top of the stack. (renumber remaining
sections accordingly) C 6.0 905.0 Alternate Method for Vent System
Sizing. C 6.1 Size of Vents 905.1 General. The size of vent piping
shall be determined from the developed length and the total number
of drainage fixture units connected in accordance with Table C 6.1
905.1. Vents shall be not less than one-half the required size of
the drainage pipe size served as determined by Table C 5.4 704.3
for horizontal fixture branches and stacks nor less than 114 inches
(32 mm) in diameter. The drainage system shall be vented by not
less than one vent pipe which shall be not less than one-half the
size of the required building drain and which shall extend from the
building drain or extension of building drain to the outdoors.
Vents shall be installed in accordance with Chapter 9 this chapter.
C 6.2 905.2 Vent Stack. A vent stack shall be required for a
drainage stack that extends five or more branch intervals above the
building drain or horizontal branch. The developed length of the
vent stack shall be measured from the lowest connection of a branch
vent to the termination outdoors. C 6.3 905.3 Branch Vents. Where
branch vents exceed 40 feet (12 192 mm) in developed length, such
vent shall be increased by one pipe size for the entire developed
length of the vent pipe. C 6.4 905.4 Venting Horizontal Offsets.
Drainage stacks with horizontal offsets shall be vented where five
or more branch intervals are located above the offset. The upper
and lower section of the horizontal offset shall be vented in
accordance with Section C 6.4.1 905.4.1 and Section C 6.4.2
905.4.2. C 6.4.1 905.4.1 Venting Upper