How Long Do Well Pumps Last in Maryland?

The biggest pump killer in Maryland is a waterlogged pressure tank. When the air charge in the pressure tank is depleted, the pump cycles on and off rapidly — sometimes 50–100 times per hour instead of 5–10. Each start puts significant stress on the motor windings. A pump that should last 15 years may fail in 5–7 under these conditions. Other factors: low pH (acidic water) corrodes pump components, high iron content causes abrasive wear on impellers, and running the pump dry (common during drought or when the water level drops) causes immediate motor damage.

Pressure tank maintenance is the single most important factor in pump longevity. The tank should be checked annually for proper pre-charge pressure (typically 2 PSI below the pump cut-in pressure). A waterlogged tank — one where the bladder has failed and the tank is full of water — should be replaced immediately. The cost of a pressure tank ($300–600 installed) is far less than a pump replacement ($1,200–2,500).

Early warning signs: pressure fluctuations (pressure drops when multiple fixtures run simultaneously), pump running longer than usual to reach cut-off pressure, air spurting from faucets (air in the line), discolored water (rust or sediment from a deteriorating pump), and unusual sounds from the pump or pressure tank. These signs often appear 6–12 months before complete failure — enough time to plan a replacement rather than face an emergency.

For pumps under 8 years old with a specific identifiable failure (capacitor, control box, wiring), repair is usually cost-effective. For pumps over 10 years old, or pumps that have failed due to motor burnout, replacement is typically the better investment. A new pump comes with a warranty; a repaired old pump may fail again within months.