Fairbanks Nijhuis type of centrifugal pump with s-trap, that can use an air-water mixture to reach a fully primed pumping condition. The pump is designed to lift water from some level below the pump suction without having to fill the suction piping with liquid. Self priming pumps are available in one and two stages and are used for fresh water, seawater, irrigation and drainage or equivalents.

• Capacity: 44 - 1,761 GPM (10 - 400 m³/h)
• Head: 32 - 360 feet (10 - 110 mlc)