Submersible vs. Jet Pump: Which Is Right for Your Well
Submersible vs. Jet Pump: Which Is Right for Your Well
By the WellWater HQ team
The choice mostly comes down to well depth. Jet pumps work well down to about 25 feet using suction alone, and can reach 80 to 110 feet with a two-pipe deep-well configuration, though efficiency drops as depth increases. Submersible pumps sit inside the well itself and push water up rather than pull it, which lets them handle anywhere from 25 feet to over 400 feet without the physical limits suction runs into.
Both pump types move water reliably when sized correctly. The real difference is where they sit, how they fail, and what it costs to fix them when they do.
How does a jet pump work, and where does it stop making sense?
A jet pump sits above ground, typically in a basement, well house, or pump house, and uses a venturi (jet) assembly to create suction that pulls water up through a pipe from the well. University extension guidance on private well distribution systems puts the practical shallow-well limit at 25 feet, the point where atmospheric suction lift stops being reliable (University of Nebraska-Lincoln Extension, Private Drinking Water Wells: The Distribution System, 2026). Beyond that depth, a two-pipe deep-well jet pump adds a second line that pressurizes water down at the well bottom before pulling it up, extending the range to 80 to 110 feet, though pumping efficiency and flow rate both decline noticeably as depth increases toward that upper limit.
Convertible jet pumps use the same pump body for both configurations. Swapping the ejector kit (the part that determines shallow or deep-well operation) changes which mode the pump runs in, which is useful if a well’s depth is borderline or a homeowner is deepening a well later.
How does a submersible pump work?
A submersible pump does the opposite of a jet pump: the entire pump unit sits down in the well, fully underwater, and pushes water up to the house through a single pipe. Pushing water from below is mechanically easier than pulling it from above, since there’s no suction-lift limit to run into, which is exactly why submersibles handle deep wells (from 25 feet down to more than 400 feet) that a jet pump physically can’t reach.
Because the motor is sealed and submerged, submersible pumps also run quieter than jet pumps, which operate audibly above ground, and they’re less prone to losing prime, a common jet pump failure mode where air gets into the suction line and the pump stops drawing water until it’s manually re-primed. Extension guidance notes that submersible pumps hold their efficiency at any depth under roughly 300 feet, while jet pump efficiency declines as depth increases toward its mechanical limit (University of Nebraska-Lincoln Extension, Private Drinking Water Wells: The Distribution System, 2026).
Jet pump vs. submersible pump: side-by-side
| Factor | Jet pump | Submersible pump |
|---|---|---|
| Depth range | Up to ~25 ft (shallow), 80 to 110 ft (deep-well, 2-pipe) | 25 ft to 400+ ft |
| Location | Above ground (basement, well house) | Fully submerged in the well |
| Noise | Audible operation | Quiet (sound dampened by water and soil) |
| Priming | Can lose prime; needs manual re-priming | Self-priming, since it’s always submerged |
| Maintenance access | Easy, no need to pull anything from the well | Requires pulling the pump from the casing |
| Typical use case | Shallow wells, cisterns, boosting pressure | Most residential wells over 25 ft deep |
Which one costs more to maintain?
Jet pumps are generally cheaper to service because the pump is accessible above ground; a failed component can usually be swapped without special equipment. Submersible pumps cost more to service when something does go wrong, since fixing or replacing the pump means pulling the entire unit and drop pipe out of the well casing, a job that typically requires a well contractor with the right rig. Submersible pumps do tend to last longer in day-to-day operation, since the motor runs cooler underwater and isn’t exposed to freezing temperatures the way an above-ground jet pump in an unheated space can be.
Which pump is right for your well?
If your well is shallower than 25 feet, a jet pump is usually the simpler and less expensive choice, and it’s easy to service yourself if something fails. If your well is deeper than 25 feet, which describes most drilled residential wells, a submersible pump is the standard choice; trying to stretch a jet pump to depths near its 80 to 110 foot ceiling usually means accepting reduced flow and efficiency that a correctly sized submersible wouldn’t have.
Run your well’s depth and household demand through the WellWater HQ pump size calculator to confirm which pump type and horsepower actually fits your situation. The WellWater HQ well water handbook covers pump selection alongside the rest of the private well ownership basics.
FAQ
Can a jet pump be converted to a submersible pump? Not by converting the existing pump itself, since they’re built and installed differently. Switching from jet to submersible means a well contractor installing a new submersible unit and drop pipe in the well, along with matching wiring and a new pressure tank setup if needed.
How deep can a jet pump go? A single-pipe shallow-well jet pump works down to about 25 feet. A two-pipe deep-well jet pump extends that to roughly 80 to 110 feet, though flow and efficiency drop as it approaches that upper range.
Why do submersible pumps last longer than jet pumps? The motor runs submerged in water, which keeps it cooler than an above-ground jet pump motor and protects it from freezing and from running dry, both common failure causes for above-ground pumps.
Is it more expensive to replace a submersible pump than a jet pump? Yes, typically. A submersible pump replacement requires pulling the pump and drop pipe from the well casing with specialized equipment, which adds labor cost beyond the part itself. A jet pump, being accessible above ground, is generally less expensive to service or replace.
Do I need a pressure tank with either pump type? Yes, both jet pumps and submersible pumps rely on a pressure tank to store water under pressure and reduce how often the pump cycles on and off; the tank isn’t optional with either setup.
Bottom line: 25 feet of well depth is the real dividing line. Shallower than that, a jet pump is simpler and cheaper to own. Deeper than that, which covers most drilled wells, a correctly sized submersible pump is the standard choice and the one that avoids the efficiency losses a jet pump takes on near its depth ceiling.