Hot Water Boiler Pressure Relief Valve

The Watts 474A pressure relief valve discharges water from a hot water heating boiler in case of emergency. This pressure relief mechanism is made of bronze, has a 3/4" female inlet, and a 3/4" female outlet.

Use only for emergency safety relief; not for operating control.

Details and Specifications:

• Material: Bronze
• Pressure Set Point: 125 PSI
• Inlet Port: 3/4" female
• Outlet Port: 3/4" female outlet
• Maximum Temperature: 250° Fahrenheit
• 1,700,000 Btu/Hr. rating
• Non-metallic disc-to-metal seating

Features:

• Seat elevated above outlet
• Non-mechanical seat-to-disc alignment
• Water seal of high temperature resisting material isolates spring working parts from water during relief