PA VB85-180/280 High Volume Unloader Valve 21gpm 2600 to 4500psi


PA VB85-180/280/310 high flow unloader valve.

Models Available:

  • 8.751-963.0 2600psi (white spring)
  • 8.751-964.0 4500psi (blue spring)

Choose pressure that closely matches the pressure rating of your pump.

  • 21gpm rated flow
  • 90°C / 195°F max temperature
  • 1/2" Female Inlet / Outlet / Bypass


Unloader valves are one of the most important safety devices on a pressure washer system. Failure to install and set the unloader properly could result in a very dangerous situation causing severe damage to the pump and possibly the operator.

Professional installation is required.