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174A

Boiler Pressure Relief Valves

  • Non-mechanical seat-to-disc alignment will not stick or freeze
  • Valve protects hot water heating boiler equipment from excessive pressure
  • Bronze body with stainless steel spring
  • Seat is located above drain to prevent water from being trapped and sediment from fouling the seat

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific 174A

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet 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