Coleman 034-0137 Pressure Switch With Unloader Valve And Lever

The Coleman 034-0137 pressure switch with unloader valve and lever is a replacement component for Coleman Black Max pressure washers. It regulates pump pressure by opening and closing the electrical circuit to the pump, while the built-in unloader valve diverts flow when the spray gun is released to prevent overpressure and enable a smooth shutdown. A manual lever provides direct control for priming, testing, or temporary bypassing of the trigger during service. This part carries the 034-0137 model number and is intended for Coleman Black Max units that require this switch, helping maintain unloading performance and reliable operation in compatible machines.