2000 to 3000 psi and up to 2.8 gpm: Pressure washers with this type of power work well for most common jobs, including cleaning siding, walkways, and decks. They usually can handle tough stains, too. 3000 to 4000 psi and up to 4.0 gpm: Pressure washers with this type of power are usually considered commercial grade. They are ideal for heavy ...
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