How a Bore Pump Works

Bore pumps deliver water from an underground source.

Bore pumps are submersible double drop jet pumps designed to draw water up from 25 feet or more below the surface. The pump uses centrifugal force to deliver water to an above ground storage tank.


A bore hole is drilled to the base of a water shelf. The jet pump is separated from the motor and submerged in the bore hole. One pipe is mounted to the impeller 10 feet to 20 feet below the minimum well water level, and a second pipe connects the jet output back to the pump.

Drawing Water

The pump motor connects to an above-ground power source. The pump itself is comprised of stacked impellers separated by a diffuser that drive the water up to the storage tank.

Delivering Water

The storage tank contains an air bladder that compresses as water is pumped into it, the resulting pressure moves the water through the plumbing system. The bore pump stops when the pressure inside the storage tank reaches a preset level and resumes when the pressure drops below that level.