General Pump - Interpump


General Pump W2 Bolt-On Unloader Valve 3000psi


Interpump W2 (ZKW2 GP) Unloader Valve - Trapped Pressure (Banjo Bolt-On).

Banjo unloaders are very compact and bolt to the inlet and outlet of the pump.

3000psi Maximum Rated Pressure

  • Rated Temperature 200°F
  • Inlet: 1/2" FPT
  • Outlet: 3/8" MPT
  • Soap injector included

Models Available:

  • W2-1 - 2.9 to 4.5gpm
    • Fits TS1371, TT1411, TT1611, TT9351, TT9441, TT9971, All "EZ" Pumps
  • W2L-1 - 2.9 to 4.5gpm
    • Fits T811, TS1011, TS1311, TS1331, TS1511, TS1711, TS2011, T9131, T9211 Pumps
  • W2L-2 - 4.5 to 6.0gpm
    • Fits T821, T921, T1021, T1321, T1621, T9121, T9161, TS821, TS921, TS1321, TS1521, TS1621, TS2021

Always choose the best match for your pump GPM.


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.