DEPRESSURIZE BEFORE DISASSEMBLING
When you’re finished using your pressure washer, turn it off and squeeze the trigger. Even after your pressure washer has been shut off, the pressure still remains inside, and can cause serious harm if released improperly.
Do not detach the hose, the spray gun, or the nozzle until you’ve squeezed the trigger and released all of the remaining pressure. Removing the gun from the high pressure hose while there’s still pressure means that highly pressurized water will be released directly into your hand.