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174A-045 1

Part of the 174A Series

Ordering Code: 0275024

UPC: 098268013344

Lead Free: NO

1 In Bronze Boiler Pressure Relief Valve, 45 psi, Threaded Female Connections

This 3/4 inch 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 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. 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 pressure relief is set at 45 psi (310.3 kPa). Pressure Range: In 5 psi (34.5 kPa) increments from 30 to 150 psi (2 to 10 bar) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.

Product Features

  • Bronze body construction
  • Nonmetallic disc-to-metal seating
  • Standard pressure relief setting 45 psi
  • For hot water heating and supply boilers
Body Material Bronze
Brand Name Watts
Inlet Connection Size 1 IN
Inlet Connection Type Female Threaded
Inlet Thread Type NPT
Lead Free NO
Maximum Temperature-Fahrenheit 250
Maximum Working Pressure-PSI 35
Model Number 174A-045 1
Outlet Connection Size 1 IN
Outlet Connection Type Female Threaded
Outlet Thread Type NPT
Part Number 0275024
Pressure Range 30 to 150 PSI
Pressure Relief Setting-PSI 45
Pressure Steam Discharge Capacity 1355000 BTU per hour at 45 PSI
Protection Type Pressure
Series 174A