Troubleshooting Low Pressure in a Shallow Well Irrigation System

A homeowner noticed their shallow well, installed four years ago for lawn and flower bed irrigation, had gradually lost pressure. Originally able to run seven sprinkler heads, the system now only supports three. The well is 24 feet deep with about 16 feet of water in the pipe leading to the pump.

Possible Causes and Solutions

The most likely issue is an obstruction somewhere in the system. Since water availability seems adequate, start by checking downstream components—valves, water lines, and the pump itself. Most shallow well systems use a jet or centrifugal pump; inspect the impellers for wear and replace them if necessary. A well service shop can assist with this.

If the pump checks out, pull the piping that extends into the well and examine it for leaks. At the bottom of the pipe, a foot valve with a screen may be clogged with debris. Ensure the valve operates properly and allows full water flow into the well pipe. Cleaning or replacing the foot valve screen often restores performance.

Choosing a Shallow Well Pump for Irrigation

For watering lawns and flower beds, a centrifugal or jet pump rated for the required flow and pressure is typical. Match the pump capacity to your sprinkler system’s demand, and consider a model with a built-in check valve to maintain prime. Consult a local irrigation supplier to size the pump correctly for your well depth and water yield.