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Jet (Ejector) Pump

A combined centrifugal and ejector pump.

In a jet pump, a portion of the discharge water from the centrifugal pump is diverted through a nozzle and venturi tube. A pressure zone lower than that of the surrounding area is created by the velocity of water flowing through the venturi tube; therefore, water from the source (the well) flows into this area of reduced pressure. The velocity of the water from the nozzle pushes the water through the pipe toward the surface where the centrifugal pump can lift it by suction. The centrifugal pump then forces the water into the water plumbing system.