1L

Temperature and Pressure Relief Valves

  • Used in water heater and hot water storage tank applications
  • Bronze body
  • Unique thermostat with special thermo-bonded coating and test lever
  • Standard Pressure Settings: 75, 100, 125, or 150 psi
  • Pressure Relief Range: 75 to 150 psi

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 1L

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA