At the heart of every gas or electric-powered, hot or cold water power washer is the high pressure washer pump, the component that pressurizes water to an extreme degree. The pump makes a pressure washer perform as it does. Creating a maximum level of pressure at a determined rate of water flow, pumps have to be durably built to sustain the level of force exerted upon their inner parts. Despite the load, pressure washer pumps will stay in good working order with the proper maintenance. If there is a problem with the pressure, nine times out of ten it is not the pump.
Pressure Washer Pump Makeup
Specifically called a positive displacement reciprocating pump, pressure washer pumps usually feature a plunger-type design, but piston-type designs are sold as well. On the best-built pumps from makers like Cat and Powerhorse, ceramic plungers, stainless steel valves and brass manifolds are used.
Pump and Flow Rate
The flow rate a pump is capable of is determined by several specifications including the pump speed, the bore of the cylinder and the stroke. By adjusting these factors during the design process, the flow rate can be increased, thereby improving the efficiency of the pressure washer. Light-duty and heavy-duty consumer pressure washer pumps typically have a flow rate of 1.5 to 4 gallons per minute, although more powerful models are available professionally.