it is the standard specification for maintaining operational safety and sequence control in Rheem and Ruud residential and commercial equipment

Which legacy models does the 21-933-1 cover replace

Is this compatible with non-Johnson Controls actuators

making it suitable for standard commercial and residential environmental controls

Watts 0382456 Relief Valve Els PW 17895 it is the standard specificationThe Watts 0382456, also identified as the Series 740 high capacity water relief valve, is a dedicated safety component for large hot water heating boilers and heat storage tanks. This specific 740 3 4 75 model features a 3 4 inch NPT threaded inlet and outlet, factory set to discharge at 75 PSI. With a discharge capacity of 1,886,000 BTU hr, this valve provides critical overpressure protection by utilizing a large orifice and a high lift disc design.