Parts of a Shallow Well Jet Pump

Parts of a Shallow Well Jet Pump

Jet pumps are considered one of the two most popular types of pumps used for private well systems and low flow irrigation applications. This solution is popular in areas with high water tables and warm climates. The pump itself is mounted above ground and typically used to lift water out of the ground through a suction pipe, which allows it to use centrifugal operation and ejection.

In order to efficiently get water from point A to B, it takes the help of many jet pump parts. Keep reading to know what the main components are for a shallow well jet pump and what they bring to the application:

• Pressure switch – Electrical switch that makes contact to start the pump when the pressure drops to the “cut-in” pressure setting and breaks contact to stop the pump when the pressure reaches the “cut-out” setting
• Impeller – Considered the only moving part of a jet pump, which is attached to the shaft and driven by the motor. The impeller moves
  water, called drive water. Water enters the eye of the impeller and is thrown out by centrifugal force. As water leaves the eye of the impeller, a low pressure area is created, causing more liquid to flow toward the inlet because of atmospheric pressure and centrifugal force.
• Diffuser – Houses the impeller and is made up of a set of stationaryvanes
• Motor – Drives the pump
• Venturi – changes the high speed jet stream back to a high pressure for delivery to the centrifugal pump. To be effective, the venturi must be combined with a nozzle.
• Nozzle – Receives water at a high pressure. The greatly increased water speed plus the low pressure around the nozzle tip is with causes suction to develop around the jet nozzle. Water around a jet nozzle is drawn into the water stream and carried along with it. To be effective, the nozzle must be combined with a venturi.

To ensure there’s a solution for you, A.Y. McDonald provides Jet Pump product options for shallow wells, convertible (shallow or deep well), and deep well applications. Each one comes with its own set of features, such as GPM, HP, and PSI ranges. To learn about the parts of a jet pump, how the pump operates, or A.Y. McDonald product options, call us at 1-800-AY-CARES, fill out a Contact Us form, or take the ‘A.Y. McDonald Jet Pump and Component Identification’ AYU course.