This 1 inch lead free bronze automatic reseating temperature and pressure relief valve with an 5 inch thermostat is installed directly in tank tappings and is used in commercial applications to provide automatic temperature and pressure protection for hot water supply tanks and hot water heaters. It features a lead free bronze body 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 F and the pressure relief is 150 psi. Non-mechanical seat to disc alignment. Thermostat is accurate and proven