Watts 174A 120 FS 2 - Part of the 174A Series ZA100F-6NH The top features a 10⅜″

The top features a 10⅜″ round heel-proof ductile iron grate securely fastened with a gasket seal to prevent leakage into lower levels

4″ × 12″

It provides effective protection from moisture

This pressure relief valve has a 3/4 inch NPTF female inlet and outlet and a 140 psi pressure relief setpoint

Watts 174A 120 FS 2 - Part of the 174A Series ZA100F-6NH The top features a 10⅜″This pressure relief valve has a 2 inch NPTF female inlet and outlet and a 120 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.