LF174A

Lead Free* Boiler Pressure Relief Valves and Flood Sensor

  • Packaged with SentryPlus Alert discharge line flood sensor
  • Lead Free* copper silicon alloy body
  • NPTF female inlet and outlet connections
  • Above drain seat to prevent sediment from fouling the valve
  • Non-mechanical seat-to-disc alignment will not stick or freeze
  • Test lever
  • Valve is designed for emergency safety relief and shall not be used as an operating control
  • Standard Pressure Setting: 30psi (206.9 kPa)
  • Pressure Range: In 5psi (34.5 kPa) increments from 30 to 150psi (2 to 10 bar)

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