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Integrated Pressure Port: Includes a factory-installed pressure tap for monitoring pressure drop
the underlying cause of the overheat condition must be diagnosed and the part replaced with a new HVAC safety switch
Direct OEM Compatibility: Specifically designed for TP970 series pneumatic thermostats
Enhanced Safety: Accurately detects venting obstructions or inducer failures to prevent hazardous combustion conditions
Watts 0382456 Relief Valve Els PW 17895 Integrated Pressure Port: Includes aThe 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.