Abstract: A booster water pump for increasing source water pressure to a high water pressure for industrial use, has an elongated tubular hollow cylinder having both ends closed with a cylinder inlet port in one end, and a cylinder outlet port to permit the cylinder to be filled with source water. The pump has a submersible motor and hydroturbine pumping unit so articulated that turbine impellers are adjacent the motor and a turbine outlet is away from the motor, the motor-pump unit fitting in the tubular cylinder. The water passageway is annular and the turbine outlet is attached inside the cylinder to the cylinder outlet port. The pump is highly portable and effective to provide high pressure water to remote locations from low pressure sources.