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.
WATTS®, 0156731, Temperature/Pressure Relief Valve, Automatic Reseating, Series: 40L, 3/4 in Nominal, MNPT x FNPT End Style, 75 to 150 psi Pressure, 210 deg F, Media: Gas/Hot Water/Oil, Test Lever Actuator, Bronze Body, 2-5/8 in W x 5-5/8 in H Dimensions
- Tamper resistant bonnet screws
- 75/100/125/150 psi (5.27/7.03/8.79/10.55 bar) standard pressure settings
- Series 40 and 140 feature a unique thermostat with a special thermo-bonded coating
- Non-mechanical seat-to-disc alignment
- Exclusively designed and manufactured by WATTS®
- Thermostat is accurate and proven