This 1 inch lead free automatic reseating temperature and pressure relief valve with a 5 inch thermostat is installed directly in tank tapings and is used in commercial applications to provide automatic temperature and pressure protection for hot water supply tanks and hot water heaters. It features lead free construction with NPT male inlet and NPT female outlet connections, thermo-bonded coated thermostat, tamper resistant bonnet screws, automatic reseating feature, and test lever. The temperature relief is 210 degrees (99 degrees C) and the pressure relief is 150 PSI.