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Boiler Pressure Relief Valve

Series M375 boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a brass body construction with NPT threaded male inlet and NPT threaded female outlet connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The standard pressure setting is 75 PSI (517 kPa) and is rated to 738,000 BTU/hr.


  • Resists corrosive water conditions
  • Resists sticking and freezing
  • Designed for emergency safety relief
  • Prevents water and sediment from being trapped in seal.

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific M375

Approval Information

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please visit our certification partner websites: