Quick Answer
Running a jet pump dry can cause damage to the pump, reduce its lifespan, and require costly repairs or replacement. It can also lead to a decrease in water pressure, flow rate, and overall system performance. This can be particularly problematic in shallow well systems where the water table is close to the surface.
Damage to the Pump and System
When a jet pump runs dry, it creates a vacuum that can cause the check valve to fail, leading to a loss of prime and a complete system failure. This can also damage the pump’s piston or diaphragm, requiring costly repairs or replacement. In a shallow well system, the check valve is especially critical as it prevents backflow from the well into the pump.
Reduced Water Pressure and Flow Rate
Running a jet pump dry also reduces the water pressure and flow rate, making it difficult to supply water to the household or irrigation system. In a shallow well system, the water table is closer to the surface, making it more prone to fluctuations in water level. This can cause the pump to cycle on and off more frequently, reducing its lifespan and increasing energy consumption.
Prevention and Maintenance
To prevent damage to the pump and system, it’s essential to maintain a minimum water level in the well. This can be achieved by installing a water level gauge or a float switch that turns off the pump when the water level drops below a certain point. Regular maintenance, such as inspecting the check valve and replacing worn-out parts, can also help prevent system failures and extend the lifespan of the pump.
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