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- Series 340, 340X 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, stainless steel spring and thermostat tube, tamper-resistant bonnet screws, automatic reseating feature, and test lever. Model 340 has a 3 in. (80mm) thermostat. Model 340X has an 8 in. (200mm) thermostat. Series 340, 340X are ASME rated and CSA listed. Temperature Relief: 210 deg F (99 deg C), Pressure Relief 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: 340, 1-1/2 in Nominal, MNPTxFNPT, 150 psi, 210 deg F, Media: Water, Bronze Body, 4-1/2 in Wx9-3/4 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
- 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, For 100DT Discharge line consult your WATTS® agent
- 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
- This device is designed for emergency safety relief and shall not be used as an operating control
- Body MaterialBronzeDomestic / ImportDomesticEnd StyleMNPT x FNPTNominal Size1-1/2 inPressure Rating150 psiDimensions4-1/2 in Wx9-3/4 in HHeight4.38 inManufacturerWatts Water TechnologiesManufacturer #0344276MediaWaterSeries340Temperature Rating210 degFTypeAutomatic Reseating