3/4" 140X Relief Valve Zoom

3/4" 140X Relief Valve


Brand: Watts

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Do not use this item for any installation or repair of potable water applications. This product does not comply with the "Safe Drinking Water Act," which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only.




Size: 3/4"
Pressure Set Point: 150 psi
Thermostat Length: 8"
Material: Stainless Steel
Application: Heating
Thread Type: Female
Temperature Range (F): 210°F Max
Connection Type: Threaded
Inlet Type: Female NPT
Outlet Type: Female Threaded (IPS)
ASME Rating (BTU/HR): 1438000
CSA Rating (BTU/HR): 205000
Width: 2-5/8"

Description for Watts 0259850

Note: This item does not comply with the 2014 Lead Free Act. It may not be used in potable water applications as of January 4, 2014. For potable water applications 0121459 is recommended.

Series 140S, 140X Automatic Reseating Temperature and Pressure Relief Valves are used in commercial water heater applications to provide automatic temperature and pressure protection to domestic hot water supply tanks and hot water heaters.
They feature a bronze body with NPT female inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating (3/4 in.) or stainless steel thermostat (1 in.), tamper-resistant bonnet screws, automatic reseating feature, and test lever.
Model 140S has a short thermostat for installation directly in available tank tappings. Model 140X has an extension thermostat for installation in the hot water outlet within the allowable distance from the top of the tank. Series 140S, 140X valves are ASME rated and CSA listed.

  • Temperature Relief: 210°F (99°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)

3/4" 140X Relief Valve

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