Abstract: A portable water supply and dispensing unit comprises a hydraulic pump having a low-voltage electric motor for operating the pump, both of which are mountable atop a water container, the electric motor being capable of being operated by a storage battery, particularly of the type of battery used in motor vehicles, the water container being provided with a pair of wheels fixed to the underside of the water container which also supports the pump and motor, for manually moving the unit about an area by means of a suitable handle member, the unit has many uses and is especially adapted to the washing of motor vehicles which are out of reach of the general water supply, such as vehicles parked in parking lots of high-rise apartment houses and the like.