909 3/4â-2â Modification Overview Production began in 1979 and is current. The 909M1 (1989) in the 11/4â-2â sizes only. Change was in the body only- internal components…

757, 757N, 757Z (2½ â â 10â) 757A (2½ â- 6â) Modification Overview Production began in 2000 under the Hunter brand. In 2002 it was produced as the Watts 757 Series.…

40-600 3â-10â Modification Overview Production of the 40 series began in 1992. The 3â-10â 40-600 was discontinued in 2003. The 40-600 used a ¾â 40-100 for the bypass…

709 3/4â-2â Modification Overview Production began in 1979 and was discontinued in 1993. Check Cover Removal Cover is o-ring sealed. Check valve assembly is attached to…

957RPDA, 957N RPDA, 957Z RPDA 21/2â-10â Modification Overview Production began in 2002 and is current. Early versions used a ¾â Flomatic RPZE for the bypass assembly.…

RPDA 4AN 21/2â â 6â Modification Overview Production of the RPDA 4AN series began in 2008. The 4AN indicates an âNâ shaped pattern. The RPDA 4AN can utilize either a…

957RPDA, 957N RPDA, 957Z RPDA 21/2â-10â Modification Overview Production began in 2002 and is current. Early versions used a ¾â Flomatic RPZE for the bypass assembly.…

RPDA 4A 2½â â 6â Modification Overview Production of the RPDA 4A series began in 2008. The RPDA 4A can utilize either a Type I or Type II bypass. A Lead free version…

C500, C500N, C500Z 21/2â-10â Modification Overview Production began in 2000 under the Hunter name. In 2002 it was produced as the Ames Colt (C) Series. Early versions used…

C400, C400N, C400Z 21/2â-10â Modification Overview Production began in 2000 under the Hunter name. In 2002 it was produced as the Ames Colt (C) Series. Check Cover Removal…