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Watts Valves Relief Valve
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Watts 3/4 In Brass Self Closing Temperature And Pressure Relief Valve, 100 psi, 180 F, Extended Shank Up To 3 In Insulation

SKU: 0066436

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Product Details

Watts 0066436

This 3/4'' extra extended shank temperature and pressure relief valve is used in water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 105,000 BTU/hr. It features an extended shank for installation on water heaters with extra thick insulation as well as a brass body with NPT male inlet and NPT female outlet connections, unique thermostat with special thermo-bonded coating, and a test lever. It is suitable for water heaters with up to 3'' (76.2 MM) of insulation. It is ASME rated. The temperature relief is 180 F (82.2C), the pressure relief setting is 100 psi (6.9 bar).


  • UPC 098268156249
  • Online Product ID 9687851
  • Material Brass
  • Includes Extended Shank Up To 3'' Insulation
  • Inlet Connection Size 0.75''
  • Inlet Connection Type Male Threaded
  • Inlet Thread Type NPT
  • Maximum Temperature Deg F 180
  • Maximum Working Pressure Psi 100
  • Outlet Connection Size 0.75''
  • Outlet Connection Thread Type NPT
  • Outlet Connection Type Female Threaded
  • Pressure Relief Setting Psi 100
  • Pressure Steam Discharge Capacity 105000 Btu/hr
  • Protection Type Temperature and Pressure
  • Series 100XL
  • Shank Length 2.5''
  • Temperature Relief Deg F 180
  • Temperature Steam Discharge Capacity 105000 Btu/hr
  • Thermostat Material Nylon Coated Copper
  • Thermostat Probe Length 2.15''

Additional information

  • Self closing safety valve for hot water heaters
  • Unique thermostat with special thermo-bonded coating
  • Bronze body construction
  • Stainless steel spring

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