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Watts Valves Relief Valve
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Watts 3/4 In Brass Self Closing Temperature And Pressure Relief Valve, 150 psi, 210 degree F, Test Lever, Extension Thermostat

SKU: 0066100

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Product Details

Watts 0066100

This 3/4'' temperature and pressure relief valve is used to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 105,000 BTU/hr. It features a brass body with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, and a test lever. This valve is ASME rated and CSA listed. Temperature relief is 210 deg F (99 deg C),temperature and pressure protection to hot water supply tanks and hot water heaters up to 105,000 BTU/hr. It features a brass body with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, and a test lever. Model 100XL-8 is also available with 8'' (200mm) extension thermostat. Series 100XL is ASME rated and CSA listed. Temperature relief is 210 deg F (99 deg C), Pressure relief range is 75 to 150psi (5.2 to 10.3 bar). Standard pressure settings are 75, 100, 125, or 150psi (5.27, 7.03, 8.79, or 10.55 bar).


  • UPC 098268000016
  • Online Product ID 3631950
  • Weight 0.57 lbs.
  • Material Brass
  • Buy American Act Compliant yes
  • Includes Test Lever
  • Inlet Connection Size 0.75''
  • Inlet Connection Type Male Threaded
  • Inlet Thread Type NPT
  • Maximum Working Pressure Psi 150
  • Outlet Connection Size 0.75''
  • Outlet Connection Thread Type NPT
  • Outlet Connection Type Female Threaded
  • Pressure Range 75 to 150
  • Pressure Relief Setting Psi 150
  • Pressure Steam Discharge Capacity 105000 Btu/hr
  • Protection Type Temperature and Pressure
  • Series 100XL
  • Shank Length 1.13''
  • Temperature Relief Deg F 210
  • Temperature Steam Discharge Capacity 105000 Btu/hr
  • Thermostat Material Copper
  • Thermostat Probe Length 3''

Additional information

  • Brass body construction
  • Required safety device on all water heaters
  • Temperature relief is 210 deg F (99 deg C)
  • Prevents water heater from blowing up
  • Includes test lever and stainless steel spring
  • ANSI Z21.22 certified
  • Features unique thermostat with special thermo-bonded coating
  • ASME rated, CSA Listed
  • Used to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 105,000 BTU/hr

About This Brand

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