Also Known As: Waterblast
A pressure washer is motor driven, delivering the water through a high-pressure hose, by pulling a trigger gun-style switch. The volume of water is measured in gallons per minute, while the pressure is measured in pounds per square inch. The pressure can typically be adjusted.
Typical power washers offer pressures from 750 to 30,000 pounds per square inch (psi). Bigger capacity washers are also available. A variety of nozzles offer different types of sprays, from spirals to fans. Detergent can be added to some power washers. Its important to follow the manufacturers instructions carefully, as the wrong detergent can damage the motor. The motor may be electric or gas fueled.
In a swimming pool or spa, power washers can be quite useful, especially during opening and closing. Power washing is the first step in replastering or repainting a pool shell. But because the spray is so strong, it can damage equipment and surfaces. In addition, power washers can be dangerous for the user. The spray can be easily misdirected, causing injury to the user or bystanders. Debris can be propelled into the air, as well.