100XL-4 3/4" Self Closing T & P Relief Valve Zoom

100XL-4 3/4" Self Closing T & P Relief Valve


Brand: Watts

0066100 has been discontinued.
Direct Replacement:
SKU: 0556000
Brand: Watts

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.


Application: Heating
Material: Bronze
Pressure Set Point: 150 psi
Size: 3/4"
Thermostat Length: 4"
Connection Type: Threaded
Thread Type: Female
Inlet Type: Male Threaded (IPS)
Outlet Type: Female Threaded (IPS)
Temperature Range (F): 210°F Max
Width: 1-3/4"
Height: 7-1/2"
CSA Temp Steam Rating (BTU/HR): 105000 btu/hr
Capacity: 105000 BTU/hr
CSA Temp Steam Rating (BTU/HR): 105000
Capacity (BTU): 105000
Weight: 12 oz

Description for Watts 0066100

Series 100XL Temperature and Pressure Relief Valves are 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 100,000 BTU/hr. They feature a bronze 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: 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).

100XL-4 3/4" Self Closing T & P Relief Valve

Q&A: Ask the Questions, share answers

SupplyHouse.com Logo

Join Our Mailing List - Sign up and receive special offers and coupons