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- Series LF40L, LF40XL 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 a Lead Free* brass body 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 LF40L has a short thermostat for installation directly in available tank tapings. Model LF40XL has an extension thermostat for installation in the hot water outlet within the allowable distance from the top of the tank. Series LF40L, LF40XL valves are ASME rated and CSA listed. Temperature Relief: 210 deg F (99 deg 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).
WATTS® Temperature/Pressure Relief Valve, Automatic Reseating, Series: LF40, 3/4 in Nominal, MNPTxFNPT, 150 psi, 210 deg F, Media: Water, Brass Body, 2-5/8 in Wx5-5/8 in H, Domestic
- Lead free cast brass construction
- Non-mechanical seat-to-disc alignment
- Tamper resistant bonnet screws
- Series 3/4 in LF40, LF140 and 1 in LF40 feature a unique thermostat with a special thermo-bonded coating
- Series 1 in LF140 are furnished with stainless steel thermostat tube
- Series LFN240, LF340 and LF342 are furnished with stainless steel thermostat tube
- 75, 100, 125 and 150 psi standard setting
- Inquire with governing authorities for local installation requirements
- The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight
- Body MaterialBRASSDomestic / ImportDomesticEnd StyleMNPT x FNPTNominal Size3/4 inPressure Rating150 psiDimensions2-5/8 in Wx5-5/8 in HHeight2.94 inManufacturerWatts Water TechnologiesManufacturer #0121421MediaWaterSeriesLF40Temperature Rating210 degFTypeAutomatic Reseating