Shop for Outdoor Power Equipment at The Home Depot. The G 3050 OH is a compact powerhouse that generates 3000 PSI, more than 60 times as much pressure as a typical garden hose. An uncluttered design with easy access to the engine and pump offers unrivaled ease of use. With a durable tubular frame, chip-resistant black powder coat finish, 10 in. pneumatic tires with metal wheel rims. The G 3050 OH is a dedicated work horse. The commercial grade brass pump is designed with non-corrosive, tempered hardened steel pistons, and a patented swash plate design which produces less vibration and prolongs the motor life. All Karcher gas pressure washers come equipped with the only self-priming pump in the industry that can siphon from standing water or a collected water source.