Karcher G3500OCT Pro Series Gas Pressure Washer, 3500 PSI, 3.2 GPM The Karcher Promise: cleaner. Quicker Professional-grade three piston crankshaft (Triplex) pump. Professional-grade unloader valve Flow control - simply rotate the flow control to adjust from 2200Psi up to 3500Psi Performance driven Karcher kxs 300cc engine Quick connect 50ft steel-braided rubber high pressure hose