Pump To convey water and other liquids, AC motors drive an impeller in a pump system. Vehicle wash motors are designed for use in car washes with regular washdowns, whereas carbonator pump motors are designed for use with vending machines and other hub-mounted pumps. Pump motors with a close coupling are used in centrifugal pumps. Jet pump motors move water from groundwater sources, whereas fire pump motors power pumps in fire sprinkler systems. In oil drilling activities, oil well pump motors are used. Pump motors circulate water in swimming pools and spas, while pressure washer motors pump water at high pressure during cleaning operations.