A brand of Watts Water Technologies, Watts Regulator Company is an innovative manufacturer of water quality products for your plumbing needs. The 3/4 inch 100XL 150 (Part # 0066100) Series Temperature and Pressure Relief Safety Valve is used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters from 15,000 up to 105,000 BTU/hr. The combined 2 in 1 T&P relief valve provides the least expensive and proven means for protection against both excessive temperature and pressure emergency conditions. Features a bronze body with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, and a test lever. Temperature sensing element must be immersed in the water within the top 6" (152mm) of the tank. ASME rated and CSA listed. Temperature Relief: 210 Degrees F (99 Degrees C), Pressure Relief Range: 75 to 150psi (5.2 to 10.3 bar), Standard Pressure Settings: 75, 100, 125, or 150psi (5.27, 7.03, 8.79, or 10.55 bar).