Suburban Mfg Water Heater Pressure Release Valve 3/4in 3/4in. if either condition develops the valve opens automatically and discharges water to reduce temperature and pressure. This is a lead free compliant version of the OEM 161157 pressure relief valve. Temperature steam rating 105000 BTU per hour set at 150 psi and 210 F. 3/4" Male Inlet x 3/4" Female Outlet. Features of Suburban Mfg Water Heater Pressure Release Valve 3/4in Protects the water heater from excessive temperatures and pressure Lead-free brass construction he valve opens automatically and discharges water to reduce temperature and pressure 3/4" male inlet 3/4" female outlet Package Contents: Suburban Mfg Water Heater Pressure Release Valve 3/4in Suburban Mfg 161230: Water Heater Pressure Release Valve 3/4in 3/4in