Abstract: A mobile pressure cleaning system contained in a mass-produced commercial van-type vehicle and including an engine and a pair of positive displacement pumps constantly driven by the engine to supply high pressure water and chemical additives to a pair of operator stations. A pair of demand type water heaters, a water supply tank, chemical additive tanks and fuel tanks are also mounted in the cargo area of the vehicle. Novel circuitry enables an operator at either station, independently of the other, to discharge cleaning fluid, hot or cold, with any desired chemical additive. The physical arrangement of the engine, pumps, and water heaters affords a high degree of accessibility to the engine and pumps for inspection, maintenance and repair.