Pressure washers are a handy way to clean your car, sidewalk and driveway. Simpson pressure washers come in two varieties- gas powered or electric motor based pressure cleaners. Whether you need something for occasional use or heavy duty cleaning jobs, the best range is between 1,300 psi up to 3,400 psi with water flow of around 5 gallons per minute (gpm). Simpson electric pressure washers help quickly remove tough dirt from surfaces such as cars and sidewalks without any scrubbing necessary! The amount of power a pressure washer provides ranges from 1k pounds/sq inch all the way up to 2000lbs./square inch depending on how often you will be using them.