Liberty Series oil-fired skids are the workhorses of the pressure washer industry. Delivering up to 3.9 GPM of hot water at up to 3000 PSI, these skid-mounted gas-powered machines are built on an open frame using heavy-gauge 11/4" powder coated steel and can be mounted to a truck or trailer. The engine and powerful belt-drive pumping unit are isolated from the rest of the machine on a shock-mounted sub-frame to reduce vibration. Each unit is ETL certified and comes with a Kärcher KT series pump and a Schedule 80 heating coil with standard stainless steel wrap..