Watts 174A 110 FS 1 1/2 - Part of the 174A Series mainline-siltfence Includes an atmospheric port that

Includes an atmospheric port that provides visual indication of failure of the second check

It features an iron body with forged bronze inlet

cast iron roof drain features a threaded extension assembly

seepage slots allow water even when surface looks “tight

The pressure setting is 45 psi (3

Watts 174A 110 FS 1 1/2 - Part of the 174A Series mainline-siltfence Includes an atmospheric port thatThis pressure relief valve has a 1 1 2 inch NPTF female inlet and outlet and a 110 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.