Series LFLL40XL, LFLLL40XL Extended Shank Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters. They feature an extended shank for installation on water heaters with extra thick insulation as well as a Lead Free* cast copper silicon allo with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, tamper-resistant bonnet screws, automatic reseating feature, and test lever. Model LFLL40XL is available in sizes 3/4 and 1 in. (20 and 25mm). Model LFLLL40XL is available in size 3/4 (20mm) with an extra long extended shank. Series LFLL40L, LFLLL40XL valves are ASME rated and CSA listed. Temperature Relief: 210°F (99°C), Pressure 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).