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A submersible pump, which is the type most often used in drilled wells, consists of a pump and motor unit. The pump is placed directly into the well, below the water level. Jet pumps are not installed in the well, but installed above ground. Jet pumps operate by forcing water through a jet or Venturi, a narrow, cone-shaped device that creates a partial vacuum (suction) and draws water from the well into the pumping system. Shallow well jet pumps that are used where the water is less than 25 feet below the surface have the jet located in the pump itself.
A. Inside the nose of a shallow well jet pump there is a nozzle and venturi pair. The nozzle blows water through the venturi which creates a pressure differential. Itâs this pressure differential that actually helps the pump build pressure. Itâs kind of the same physics principal used in a jet engine. shallow well jet pump has the nozzle & venturi of the jet system built into the nose of the pump. In a deep well jet pump setup, the nozzle & venturi are put into an ejector package or âjet kitâ that gets placed down in the well.