Purchase commercial pressure washers from retailers, online auction sites and through classified advertisements. The biggest differences between household and commercial pressure washers are the sort of attachments included and the maximum pounds per square inch, or psi, of water pressure delivered by the unit.
Most commercial pressure washers are powered by gasoline or diesel fuel and are able to deliver water pressure of 2000 pounds per square inch or more. This is the minimum considered usable for many commercial applications.
Choosing the right attachment is essential to complete a task properly. There are pressure washer attachments available for cleaning windows, driveways, fences, decks, automobiles, recreation vehicles and paint removal. Some tasks require that cleaning solution be added to the water.