Watts 174A 135 FS 3/4 - Part of the 174A Series ZA100F-2NH is H-20 rated and rated

is H-20 rated and rated for NDS Class C loads (up to 325 psi)

ZB415H-4IP

protecting nearby streams and rivers from runoff

UPC - 098268038101

Watts 174A 135 FS 3/4 - Part of the 174A Series ZA100F-2NH is H-20 rated and ratedThis pressure relief valve has a 3 4 inch NPTF female inlet and outlet and a 135 psi pressure relief setpoint. The valve can be used for hot water space heating boiler applications to protect against excessive pressure. It features a bronze body, non metallic disc to metal seating, and test lever. Includes a nonrestrictive discharge drain line flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve.