Pressure Washer Common Parts Glossary

Air filter

The pressure washer engine's air filter removes contaminants from the air before it reaches the engine to help reduce engine wear and improve efficiency.

Shop

Pressure_washer_air_filter_797301
air filters , or for best results, search using your model number. Can't find your model number? Use our finder.

Carburetor

The carburetor mixes air with fuel in the proper proportion to produce a combustible gas. That gas/air mixture then moves into the cylinder, where the piston compresses it and the spark plug ignites it.

Shop

PW carburetor71_500_799868
carburetors , or for best results, search using your model number. Can't find your model number? Use our finder.

Carburetor rebuild kit

The carburetor rebuild kit includes gaskets, seals, a hinge pin and other components to refurbish the carburetor.

Check valve

Check valves are spring-actuated pump valves that allow pressurized water to flow in only one direction through the pump.

Check valve kit

The check valve kit replaces the pump check valves, which ensure the proper flow of water through the pump and manifold so the water going to the nozzle is properly pressurized.

Chemical injection system

The chemical injection system siphons detergent from a container and mixes the detergent with low-pressure outlet spray water.

Pressure hose

The pressure hose connects the pump to the spray wand. The pressure hose carries the pressurized water safely from the pump to the spray wand.

Pump

The pump is connected to the engine crank shaft. The engine crank shaft spins the pressure washer pump to create the water pressure for the spray nozzle.

Shop

PW pump71_580_205816GS
pumps , or for best results, search using your model number. Can't find your model number? Use our finder.

Recoil starter

The recoil starter engages the crankshaft and starts the engine. The starter, which is mounted on the top of the engine, consists of a rope and spring-loaded pulley system. Pull the rope to spin the crankshaft and start the engine. The springs retract the starter rope when you release it.

Spray gun

The spray gun has a trigger and trigger lock to control the application of water onto the cleaning surface.

Shop

PW spray gun71_580_319853GS
spray guns , or for best results, search using your model number. Can't find your model number? Use our finder.

Spray gun extension

The spray gun extension allows you to switch between a variety of spray tips.

Spray tip

The spray tip connects to the end of the spray wand. The spray tip restricts water flow and creates a spray pattern. An assortment of spray tips is usually provided with the pressure washer.

Shop

PW spray tip71_580_200557GS
spray tips , or for best results, search using your model number. Can't find your model number? Use our finder.

Thermal relief valve

The thermal relief valve protects the pump from overheating. If the spray wand is unused for more than 5 minutes while the pump is running, the pressurized water heats up quickly. If the water gets too hot, the thermal relief valve opens to prevent damage to the pump. The thermal relief valve closes once the water temperature is cooler.

Unloader valve

The unloader valve opens to relieve water pressure and recirculate water through the pump when the spray wand isn’t in use and the pressure washer is running. Recirculating water helps prevent the pump from overheating when the spray wand isn’t discharging water.