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LF53L Watts

Lead Free* Poppet Type Pressure Relief Valves for Protection Against Excessive Pressure

Series LF53L Lead Free* Poppet Type Pressure Relief Valves are used for protection against excessive pressure on domestic storage tanks or tankless water heaters. Model LF53L has the same basic design as Model LF3L except it is furnished in 1/2 in. (15mm) size and does not comply with ASME requirements. Pressure range is 75-150psi (5.2-10.3 bar). Series LF53L comes in standard settings of 75, 100, 125 and 150psi (5.2, 6.9, 8.6 and 10.3 bar). These pressure relief valves are popularly used in conjunction with the Model LF210 gas shutoff valve on gas water heaters to shut off gas to heater if water heater temperature exceeds 210 degreeF (99 degreeC). The LF53L features Lead Free* construction to comply with Lead Free* installation requirements.


  • Lead Free* cast copper silicon alloy body
  • Poppet-style valve protects domestic storage tanks and tankless water heaters from excessive pressure
  • 1/2 in. (15mm) size
  • Furnished with test lever

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF53L