TABLE 6-4 FLUSHOMETER FIXTURE UNITS FOR WATER SIZING FIXTURE CATEGORIES 1 40 20 2 70 35 3 90 45 4 105 53 5 and above NO. OF FLUSHOMETER VALVES Fixture Units Assigned for Water Closets and Similar Fixtures Fixture Units Assigned for Urinals and Similar Fixtures 115 plus 10 for each additional fixture in excess of 5 58 plus 5 for each additional fixture in excess of 5
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TABLE 6-4FLUSHOMETER FIXTURE UNITS FOR WATER SIZING
FIXTURE CATEGORIES
1 40 20
2 70 35
3 90 45
4 105 53
5 and above
NO. OF FLUSHOMETER VALVES
Fixture Units Assigned for Water Closets and
Similar Fixtures
Fixture Units Assigned for Urinals and
Similar Fixtures
115 plus 10 for each additional fixture
in excess of 5
58 plus 5 for each additional fixture in
excess of 5
TABLE 6-5
EQUIVALENT WATER SUPPLY FIXTURE UNITS (WSFU)
Includes Combined Hot and Cold Water Demands
Item No. FIXTURE
Private Use Public Use
1 Bar Sink 1 2
2 Bath Thub(With or Without Shower Over) 2 4
3 Bidet 2 4
4 Dental Unit or Cuspidor 1
5 Drinking Fountain (each faucet) 1 2
6 Hose Bib or sill cock (standard type) 3 5
7 Laundry Tub or Clothes Washer (each pair of faucets) 2 4
8 Lavatory 1 2
9 Lavatory (Dental) 1 1
10 Lawn Sprinklers (standard type each head) 1 1
11 Mobile Home (each) 6 6
12 Shower (each head) 2 4
13 Sink (bar) 1 2
14 Sink (flushing rim clinic) 10
15 Sink or dishwasher 2 4
16 Sink (wash-up circular spray) 4
17 Sink (wash-up each set of faucets) 2
18 Urinal (flush tank) 3
19 Urinal (pedestal or similar type) 10
20 Urinal (stall) 5
21 Urinal (wall) 5
22 Water Closet (flush tank) 3 5
23 Water Closet (economical flush) 2.5 4
24 Water Closet (flushometer tank) 3 5
25
a - 9.5mm 1 2
b - 13mm 2 4
c - 19mm 3 6
d - 25mm 6 10
No. of Water Supply Fixture Units (WSFU)
Water Closet (flushometer valve) Water supply outlets for items not listed above shall be computed at their maximum demand but in case less than
Note : See Sub section 609.9 of Section 609 for Method of sizing flushometer valve installation using Table 6-6
FIXTURE UNIT TABLE FOR DETERMINING WATER PIPE AND METER SIZES
PRESSURE RANGE - 207 - 310 Kpa ( 30 TO 45 PSI) 1 psi =6.895 Kpa
Item No.MAXIMUM ALLOWABLE LENGTH (meters)
mm mm 12 18 24 30 46 61 76 91 122 152 183 213 2441
FIXTURE UNIT TABLE FOR DETERMINING WATER PIPE AND METER SIZES
MAXIMUM ALLOWABLE LENGTH (meters)
274 3050 02 16 66 6
11 1111 1120 2020 2054 5154 51
143 133
MAXIMUM ALLOWABLE LENGTH (meters)
274 3050 03 38 58 5
17 1617 1632 3032 30
102 94102 94267 250
MAXIMUM ALLOWABLE LENGTH (meters)
274 3051 04 4
12 1112 1122 2122 2143 4043 40
141 129141 129356 329
TABLE 7-1
MAXIMUM TRAP LOADING
ITEM No. PIPE SIZE FIXTURE UNIT (FU)
1 32 1
2 38 3
3 51 4
4 76 6
5 102 8
TABLE 7-2
Item No. FIXTURE
1 Baththubs 38 2
2 Bidets 38 2
3 Clothes Washer * 51 2
4 Dental Unit or Cuspidor 32 1
5 Drinking Fountain 31 1
6 Floor Drain 51 2
7 Interceptors * for grease, oil, etc 51 3
8 Interceptors * for sand, autowash, etc 76 6
9 Laundry Tubs 38 2
10 Mobile Home park traps(one for each trailer) 76 6
11 38 1
12 51 3
13 Shower (single stall) 51 2
14 Shower * gang(one unit per head) 51
15 Sinks and/or dishwashers(residential) 51mm min waste 38 2
16 Sinks, bar, commercial 51mm min waste 38 2
17 Sinks, bar, private 38mm min waste 38 1
18 38 3
19 Sink, flushing rim, clinic 76 6
20 Sink, service 51 3
21 Urinal, pedestal, trap arm only 76 6
22 Urinal, stall, separate trap 51 2
23 Urinal, wall-mounted, integral trap, trap arm only 51 3
24 Urinal, wall-mounted, blowout, integral trap, trap arm only 76 6
25 51 2
26 38 2
27 Wash basins, in sets 38 2
28 Wash basins (lavatory( single 32 1
29 Water Closet, *private installation 76 4
30 Water Closet, public installation 76 6
* MINIMUM TRAP DIAMETERS and DRAINAGE FIXTURE UNITS (DFU) VALUES
TRAP and TRAP ARM
SIZE
DRAINAGE FIXTURE
UNITS (DFU)
Receptors *(floor sinks), indirect waste receptors for refrigerators, coffe urns, water station, etc
Receptors * indirect waste receptors for commercial sinks, dishwashers, air washers,etc
Sinks, commercial or industrial, school, etc, including dishwashers, wash up sinks, and wash fountains 50.8 mm waste
Urinal, wall-mounted, washdown or siphon jet, integral trap, trap arm only
Urinal, wall-mounted, washout, separate trap 50.8mm min waste
TABLE 7-3DISCHARGE CAPACITY
Liters per second / FU
For Intermittent Flow Only
ITEM No. Liters / Second (L/s)
1 up to .47 1 unit(s)
2 .50 to .95 2 unit(s)
3 1 to 1.89 4 unit(s)
4 1.95 to 3.15 6 unit(s)
Fixture Unit (FU)
TABLE 7-4CLEANOUTS
CLEANOUT SIZE (mm)
38 38 11-½
51 38 11-½
64 64 8
76 64 8
102 and larger 89 8
PIPE SIZE (mm)
THREADS PER 25.4mm
TABLE 8-1
NO.
1 19 19 51
2 25.4 25.4 64
3 32 32 76
4 38 38 102
5 51 51 127
6 64 64 152
PIPE CONNECTIONS IN BLOWOFF CONDENSERS AND SUMPS
BOILER BLOWOFF, mm
WATER OUTLET mm
VENT SIZE mm
Note : To be used only with boilers of 9.29 m3 of heating surface or less
TABLE 10-1
32 0.76
38 1.07
51 1.52
76 1.83
102 and larger 3.05
Slope = 2% or 20mm/meter
HORIZONTAL DISTANCE OF TRAP ARMS (Except for Water Closets and Similar Fixtures)
TRAP ARM DIAMETER mm
DISTANCE TO VENT m
The Developed length between the trap of water closet or similar fixturemeasured from top of closet reing(closed flange) to inner edge of ventshall notexceed 1.8m
TABLE 10-2GREASE TRAPS CAPACITY
1 76 18
2 95 23
3 132 32
4 189 45
TOTAL No. OF FIXTURES
CONNECTED
FLOW RATE REQ'D, Liters per Minute
GREASE RETENTION CAPACITY, Kilograms
TABLE 10-4
SIZING OF GREASE INTERCEPTORS
1 Meals Served at Peak Hour
2 Waste Flow Rate
a. With dishwashing machine 6 gallon(22.7L) flow
b. Without dishwashing machine 5 gallon(18.9L) flow
c. Single service kitchen 2 gallon(7.6L) flow
d. Food waste disposer 1 gallon(3.8L) flow
3 Retention Times
Commercial kitchen waste dishwasher 2.5 hrs
Single service kitchen Single serving 1.5 hrs
4 Storage factors
Fully equipped commercial kitchen 8 hr operation
16 hr operation
24 hr operation
Single Service Kitchen
No. of Meals per peak hour1 x Waste Flow Rate2 x Retention Time3 x Storage Factor4 = Interceptor size (Liquid Capacity)
* For Manila and Environs, a rainfall intensity of 102mm per hour is used
SIZING OF ROOF DRAINS AND DOWNSPOUTS FOR VARYING RAINFALL INTENSITIES** Quantities are
Horizontal Projected Roof Area in square meters"
RAINFALL INTENSITY/H
R
* Round, square,or rectangle rainwater pipe may be use circleand are considered equivalent when enclosing an inscribed circle equivalent to the drain leader diameter
1. The sizing for vertical conductors, leaders and drain is based on the pipes flowing 7/24 full
ITEM No.
DRAIN SIZE, LEADER OR PIPE, mm
Flow, L/s
MAXIMUM ALLOWABLE HORIZONTAL PROJECTED ROOF AREAS, sq.m AT VARIOUS RAINFALL RATES
2. For rainfall rates other than those listed, determine the allowable roof area by dividing the area given in the 25mm/hr column by the desired rainfall rate
3. Vertical pipong may be round, square, or rectangular. Square pipe shall be sized to enclosed its equivalent round pipe. Rectangular pipe shall have at least the same cross-sectional area as its equivalent round pipe, except that the ratio of its side dimensions shall not exceed 3 to 1