Watts® 174A Boiler Pressure Relief Valve, 3/4"

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 bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat.

• 3/4"
• For hot water heating & supply boilers
• Pressure protection only, standard pressure setting is 30 PSI, maximum BTU input at 30 PSI is 650,000 BTU
• Bronze body construction
• 3/4" female iron pipe x 3/4" female iron pipe connections
• HV, NB & ASME listed
• It 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) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.