How Do Pressure Washers Work?

Pressure washers use pumps to amplify water pressure. A pressure washer pump is the most important component of your pressure washer. Pressure washer pumps have two connection points for low and high pressure. The low-pressure connection (IN) is threaded to accept a standard garden hose. The high-pressure connection (OUT) accepts a pressure washer hose (typically M22 threaded or 3/8-inch QC) that connects to a hand-held pressure washer wand. Pressure washers come with the same kind of pressure washer parts such as an axial or triplex pump and interchangeable nozzles.

Axial pumps are best used for small jobs around the house. They are easy to use and require little maintenance.

Triplex pumps are ideal for daily or frequent use, need to be maintained and can be repaired to ensure years of quality performance.

Interchangeable nozzles control the wand’s spray pattern. Most pressure washers include wands that use a 1/4-inch quick connect system.


Tip: It's recommended that you apply a pump protector after every use. Pump protectors will lubricate your pump's seals and prevent the buildup of corrosive minerals and ice.