Watts 174A 125 FS 1 1/2 - Part of the 174A Series Strip Drian 3/4 inch NPT end connections

3/4 inch NPT end connections

Features Epoxy coated cast iron

UPC - 098268918533

It provides continuous purging and venting of air in the system when installed with Watts Model ET expansion tank and Model FV4 float-vent

ZM415SS-4IG

Watts 174A 125 FS 1 1/2 - Part of the 174A Series Strip Drian 3/4 inch NPT end connectionsThis pressure relief valve has a 1 1 2 inch NPTF female inlet and outlet and a 125 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.