WATTS® 0274428 174A Pressure Relief Valve, 3/4 in Nominal, FNPT End Style, 30 psi Pressure, Bronze Body, Domestic

WA174AI30 MFG #: 174A-3/4-30
  • Body Material: Bronze
  • Country of Origin: US
  • Dimensions: 2-3/4 in L x 4-1/2 in H
  • Domestic/Import: Domestic
  • End Style: FNPT
  • Manufacturer Name: Watts Water Technologies
  • Media: Water
  • Nominal Size: 3/4 in
  • Series: 174A, 174A-030
  • Features and More


  • Seat located above drain water can't be trapped and sediment can't foul seat
  • Non-mechanical seat-to-disc alignment will not stick or freeze
  • Water seal of high temperature resisting material isolates spring working parts from water during relief
  • Nonmetallic disc-to-metal seating
  • The discharge line must be the same size as the valve outlet, and must pitch downward from the valve to a safe place for disposal
  • Valve lever must be tripped at least once a year to ensure that waterways are clear, This device is designed for emergency safety relief and shall not be used as an operating control


  • Pressure Protection of Hot Water Heating Boilers


  • ASME Section IV
  • MIL-V-18634B
  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.


  • Limited