General Pump - Interpump


General Pump K1 Soft Unloader 10.8gpm 3600psi


General Pump / Interpump K1 (ZK1 GP) flow activated unloader valve.

3600psi Maximum Rated Pressure

  • 3.4 to 10.8gpm rated flow
  • 3/8" Inlet
  • 1/2" Male Bypass
  • 1/4" Gauge / Accessory Port
  • 165°F max temperature
  • Easy to manage hose, no pressure trapped in lines
  • Not suited for multi-gun systems

Models Available:

  • 8.712-601.0 - 1/2" Outlet
  • 8.712-602.0 - 3/8" Outlet


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.