Other than the wand or trigger, power washer pumps are the most expensive part to replace on your unit except for the motor. Ultimate Washer is a distributor for many great makers of power washer pumps.

They offer pumps from AR, Comet, CAT, General, Giant, Kranzle and Legacy. Their pumps range in price from under three hundred ($300) dollars to over twelve hundred ($1200) and arrive plumbed. In other words, they already have the unloader, garden hose fitting, thermal relief valve, and pressure hose fitting. DeVilbiss parts offers a complete selection of replacement repair parts for DeVilbiss, Porter Cable, Ex-Cell, Husky, DeWalt and Delta power washers.

Replacing a power washer pump is a relatively simple process for almost anyone with rudimentary mechanical experience. There are only a couple of bolts that need to be removed and the power washer pump will slide out if it is a direct drive pump. You will need to disconnect the outlet hose to remove the pump.

AR North America offers power washer pumps for their Blue Clean power Washers and a complete line of accessories, wands and triggers. They also sell motors, car wash equipment, pump accessories, cleaning heads, nozzles and brushes. Even a car wash pressure pump is built on the same premise as for a residential machine. The medium duty triplex plunger pump delivers 4000 psi at 3200 rpm on engines of 5 HP to 13 HP. This will pump 4 gallons per minute at the pressure and engine speed shown above.