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disc screw
and a rubber diaphragm and disc
It features an epoxy-coated cast iron body with an integral countersunk deck flange for secure anchoring and a square top size of 15⅝″ equipped with a heel-proof ductile iron grate
ready-to-ship solution
Watts 174A 100 FS 3/4 - Part of the 174A Series ZC100F-8NH disc screwThis pressure relief valve has a 3 4 inch NPTF female inlet and outlet and a 100 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.
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