Watts 174A-110 3/4 - Part of the 174A Series ADS This thermal actuator kit is

This thermal actuator kit is used to repair or replace the thermal actuator of a 3/4 to 1 inch lead free master tempering valve

Z551-3NL-SS

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Robust Cast Iron Body: Heavy-duty

Watts 174A-110 3/4 - Part of the 174A Series ADS This thermal actuator kit isThis 3 4 inch boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non metallic disc to metal seating, stainless steel spring, and test lever. It resists corrosive water conditions,