Technical Foundation
What Is a Jet Pump System?
A jet pump combines a centrifugal pump with a venturi-style ejector (jet) that recirculates a portion of discharge water back down into the well, using the venturi effect to increase suction lift capability beyond what the centrifugal pump could achieve alone. Shallow well jet pumps mount the ejector inside the pump housing itself and are limited to roughly 25 feet of practical suction lift, suitable for wells where the water table is close to the surface.
Deep well jet pumps relocate the ejector assembly down into the well itself (typically near the bottom of the drop pipe), using a two-pipe system that separates the drive water flow from the return flow, extending practical lift to roughly 25 to 90+ feet of total lift depending on pump horsepower and well diameter. Convertible jet pumps ship with both configurations, letting the same pump body serve either a shallow or deep application depending on which ejector kit is installed at setup.
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| Spec | What It Means | Why It Matters |
|---|---|---|
| Well Type | Shallow well (to ~25 ft lift) vs. deep well (to ~90+ ft) | Ejector location and pipe configuration differ fundamentally between the two — not interchangeable without a conversion kit |
| Flow Rate (GPM) | Sized to household fixture count or irrigation demand | Undersized flow causes pressure drop during simultaneous fixture use |
| Motor Horsepower | Typically 1/2 to 1.5 HP for residential use | Higher horsepower needed for deeper lift and/or higher flow rate combined |
| Pipe Configuration | Single-pipe (shallow) vs. two-pipe (deep well) | Deep well jet pumps require a separate drive and return pipe to the submerged ejector |
| Pressure Tank Size | Sized to minimize pump cycling frequency | Undersized tanks cause excessive pump cycling, accelerating wear |
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Applications
Where Jet Pump Systems Get Used
Jet pumps are specified for well water supply wherever a submersible pump isn't installed, particularly for shallow to moderate-depth wells in residential and agricultural use.
Residential Well Water Supply
Jet pumps providing household water pressure and flow from private wells where municipal water isn't available.
Agricultural & Farm Water Supply
Jet pump systems supplying livestock watering and farm building water needs from on-site wells.
Irrigation from Well Sources
Jet pumps supplying pressurized water for lawn and garden irrigation from a private well.
Cabin & Remote Property Water Systems
Jet pumps providing basic water supply for seasonal or off-grid properties with well access.
Livestock & Rural Water Systems
Jet pump systems supplying stock tanks and rural water distribution from well sources.
Construction Site Temporary Water Supply
Portable jet pump setups providing temporary water access from wells during site development.
Brands
Jet Pump Systems Brands in the Catalogue
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FAQ
Jet Pump Systems Questions, Answered
How do I know if I need a shallow well or deep well jet pump?
The determining factor is the vertical distance from the pump to the water's static level in the well, not the well's total depth — shallow well pumps handle up to roughly 25 feet of lift with the ejector built into the pump body, while deep well pumps use a submerged ejector assembly to reach greater lift. Measure or obtain your well's static water level before selecting, since using a shallow well pump beyond its lift limit will result in poor or no flow.
What's the difference between a jet pump and a submersible pump for well water?
A jet pump sits above ground (at the wellhead or in a pump house) and pulls water up through suction, while a submersible pump sits down in the well itself, below the water line, and pushes water up under positive pressure. Submersible pumps are generally more efficient and quieter for deeper wells, but jet pumps are easier to service since they don't require pulling the pump out of the well for maintenance.
Can I convert a shallow well jet pump to deep well use?
Only if it's a convertible model designed to accept both ejector configurations — a dedicated shallow well pump's housing and ejector are not typically field-convertible to the two-pipe deep well configuration. Check whether your specific pump model is sold as convertible before assuming a conversion kit will fit.
Why does my jet pump lose prime or fail to pump water?
Common causes include a leak in the suction line allowing air to enter (breaking the vacuum needed for suction lift), a foot valve at the well end that's stuck open or worn, or the water level having dropped below the pump's effective lift range. Loss of prime is one of the most common jet pump service calls and usually traces back to an air leak somewhere in the suction-side plumbing.
How do I size the pressure tank for a jet pump system?
Pressure tank size should be large enough to provide a reasonable draw-down volume between pump cycles — an undersized tank causes the pump to start and stop frequently even during modest water use, which accelerates motor and switch wear. Tank sizing tables from pump manufacturers correlate tank size to typical household fixture count and pump flow rate.
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