Otherwise you will destroy the blades permanently and will need to replace them

The 24K860 Air Valve Repair Kit from Graco that include:

AW-9000-0005 With surge brakes and 200-gallon water tank

AGW Series Operation

Pressure Washer 4302 3/8" x 150' 4500 PSI 2 Wire Braid Black Neptune Hose Steel-Media Otherwise you will destroy the4500 PSI 3 8"x150' BLACK NEPTUNE HOSE FEATURES: Neptune 4500 hose is for use on pressure washer machines with working pressures upt to 4500 PSI adn temperatures up to 250 F. (121 C) Tube and cover are resistant to most cleaning solutions Lightweight and Flexible Two wire braid reinforcement Tube construction Black Chemigum ORS; RMA Class A (High oil resistance) Cover black oil resistant synthetic rubber: RMA class B (Medium high oil resistance)