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Lead Free* Extended Shank Automatic Re-seating Temperature and Pressure Relief Valves

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 alloy 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 degreeF (99 degreeC). 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).


  • Valve provides automatic temperature and pressure protection to hot water storage tanks and water heaters
  • Automatic reseating feature
  • Extended shank eliminates need for an extension nipple when used with water heaters that have extra thick insulation
  • Accurate thermostat with special thermo-bonded coating

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Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: