Kärcher has introduced a new line of self-contained, skid-mounted, electric-powered and diesel-heated hot-water pressure washers as part of the Liberty Series. There are five models with cleaning power ranging from 4.2 to 4.8 GPM (gallons per minute) and 2,000 to 3,000 PSI (pounds per square inch) of pressure. All five are encased in a rugged, steel cage made of 1-1/4-inch steel tubing and painted with an epoxy powder coat finish for all-weather protection.