A pressure washer isn't like a regular water hose that you use, for example, on the dog, and so the PSI (pounds per square inch) can truly be the difference between cleaning something and damaging it.

Shopping for a pressure washer, a versatile tool for household cleaning and maintenance projects, may be overwhelming especially when faced with unfamiliar specs like GPM and PSI. If you factor in ...

The surface area of the plunger and the degree of spring compression determine the amount of pressure necessary to actuate the switch. When pressure on the plunger exceeds that exerted by the spring, ...