Common problems when installing a jet pump — what to expect?

Suction and Priming Issues

Suction problems are often the result of inadequate well development, poor well casing or screen design, or insufficient suction lift. A minimum of 10-15 feet of suction lift is recommended for a jet pump. If the well is too shallow, the pump may not be able to create enough vacuum to draw water from the well. Inadequate well development can also cause suction issues, as it may not provide enough water to feed the pump. To address suction issues, it’s essential to ensure the well is properly developed, and the pump is sized correctly for the well’s water output.

Pressure Head and Pump Sizing

Pressure head issues can be caused by insufficient pump sizing or inadequate tank sizing. A general rule of thumb is to size the pump to provide 10-15 gallons per minute (GPM) of flow rate per 100 feet of lift. For example, if the well is 200 feet deep, a pump with a flow rate of 20-30 GPM would be required. Inadequate tank sizing can also cause pressure head issues, as it may not be able to provide enough storage for the water being pumped. A minimum tank size of 50-100 gallons is recommended to ensure stable water pressure.

Installation and Maintenance

Proper installation and maintenance are critical to ensuring the jet pump runs efficiently and effectively. Ensure the pump is installed at the correct elevation, and the suction line is properly sized and configured to minimize friction losses. Regular maintenance tasks, such as checking the pump’s priming system, inspecting the well casing and screen, and performing routine pump cleanings, can help prevent common problems and extend the pump’s lifespan.