Repair vs Replace
a Well Pump
How do you know whether to repair or replace your well pump? Here is the decision framework we use on every service call in Southern Maryland.
If your pump is over 10 years old and has failed, replace it. Repair costs on an aging pump often reach 50–70% of replacement cost — and you will likely be replacing it within 2 years anyway.
Repair vs Replace — At a Glance
| Factor | Repair | Replace |
|---|---|---|
| Pump age | Under 7 years | Over 10 years |
| Failure type | Single component (capacitor, pressure switch) | Motor failure, burned windings |
| Repair cost vs replacement | Under 40% of replacement cost | Over 50% of replacement cost |
| Previous repairs | First failure | Second or third failure |
| Water chemistry | Normal | Corrosive (low pH, high iron) |
| Typical cost | Minor repair cost | Full replacement cost |
When to Repair
Repair makes sense when the pump is relatively new (under 7 years), the failure is a single component (capacitor, pressure switch, control box, wiring), and the repair cost is well under 50% of replacement cost.
A capacitor replacement on a 4-year-old pump is a minor repair that makes complete sense. A control box replacement on a 6-year-old pump is similar.
When to Replace
Replace when the pump is over 10 years old, when the motor has failed (burned windings, seized bearings), when repair costs exceed 50% of replacement, or when the pump has already been repaired once or twice.
In Southern Maryland, corrosive water chemistry (low pH, high iron, hydrogen sulfide) accelerates pump wear — a pump in these conditions may need replacement at 8–10 years rather than 12–15.
The Amp Draw Test
Before recommending repair or replacement, we pull the pump and check the amp draw against the nameplate rating. A pump drawing significantly more amps than rated is working harder than it should — a sign of worn bearings or a partially failed motor. This test prevents the "repair it today, replace it in 6 months" scenario.
Decision Guide
Repair if…
- Pump is under 7 years old
- Single component failure
- Repair cost under 40% of replacement
Replace if…
- Pump is over 10 years old
- Motor failure
- Repair cost over 50% of replacement
- Second or third failure
Always replace if…
- Pump ran dry
- Submerged in flood water
- Visible corrosion damage
Frequently Asked Questions
Straight answers from a licensed master plumber.
How long should a well pump last?
Most submersible well pumps last 10–15 years in normal conditions. In Southern Maryland, corrosive water chemistry (low pH, high iron) can shorten this to 8–12 years. Pumps that cycle frequently due to an undersized pressure tank also fail earlier.
What does it cost to replace a well pump in Maryland?
A well pump replacement in Southern Maryland varies in cost depending on pump depth, pump size, and whether the pressure tank also needs replacement. Emergency replacements (same-day service) may cost more. Contact us for a free estimate.
Can I repair a well pump myself?
Replacing a submersible well pump requires pulling the pump from the well, which requires a pump puller or significant physical effort for deep wells. It also requires electrical work and proper torque on the drop pipe connections. We do not recommend DIY pump replacement — an improperly installed pump can damage the well casing or fail immediately.
What causes a well pump to fail?
The most common causes are: running dry (low water table or high demand), rapid cycling from a waterlogged pressure tank, corrosive water chemistry, age (worn bearings and motor windings), and lightning strikes. We diagnose the cause before recommending a replacement to prevent the same failure from recurring.
How do I know if my well pump is failing?
Warning signs include: gradual loss of water pressure, pump running constantly, air spurting from faucets, no water at all, and the circuit breaker tripping. A pump that runs but delivers no water has usually failed completely.
Well Pump Problem? We Diagnose Before We Quote.
We pull the pump, run the amp draw test, and give you an honest repair-vs-replace recommendation — before you spend a dollar.