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- Series 40L, 40XL 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 bronze 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 40L has a short thermostat for installation directly in available tank tapings. Model 40XL has an extension thermostat for installation in the hot water outlet within the allowable distance from the top of the tank. Series 40L, 40XL 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: 40, 3/4 in Nominal, MNPTxFNPT, 75 psi, 210 deg F, Media: Water, Bronze Body, 2-5/8 in Wx5-5/8 in H, Domestic
- Non mechanical seat to disc alignment
- Thermostat is accurate and proven exclusively designed and manufactured by WATTS®
- Tamper resistant bonnet screws
- Series 40 and 140 feature a unique thermostat with a special thermo-bonded coating
- Series 140 sizes 1 in (25 mm) and above are standardly furnished with stainless steel thermostat tube
- Series N240, 340 and 342 are furnished with stainless steel thermostat
- 75, 100, 125 and 150 psi standard setting
- The discharge line must be the same size as the valve outlet and must pitch downward from the valve and terminate at least 6 in (152 mm) above the floor drain where any discharge will be clearly visible
- Inquire with governing authorities for local installation requirements
- A relief valve functions in an emergency by discharging water, therefore, it is essential that a discharge line be piped from the valve in order to carry the overflow to a safe place of disposal
- For 100DT discharge line consult your WATTS® agent
- This device is designed for emergency safety relief and shall not be used as an operating control
- Body MaterialBronzeDomestic / ImportDomesticEnd StyleMNPT x FNPTNominal Size3/4 inPressure Rating75 psiDimensions2-5/8 in Wx5-5/8 in HHeight3.0 inManufacturerWatts Water TechnologiesManufacturer #0156081MediaWaterSeries40 SeriesTemperature Rating210 degFTypeAutomatic Reseating