Well Pump and Pressure Tank Replacement Cost
Why well pump and pressure tank often fail together
Your well pump and pressure tank work as a team. The pump draws water from the well and the pressure tank stores it under pressure so the pump does not have to cycle on every time you open a tap. When one component shows its age, the other is often not far behind. Replacing both at the same service visit saves a second service call, and the combined installed cost is usually less than two separate jobs. Use our well pump and pressure tank cost calculator to get a combined estimate for your setup.
Well pump and pressure tank replacement cost
Replacing both units together typically runs $1,000 to $2,500 for most residential installations. This compares to $800 to $1,600 for the pump alone and $300 to $700 for a pressure tank replacement alone. The savings on a combined job come from sharing one service call fee, one contractor trip, and one set of shutoff and reconnection procedures.
| Replacement scenario | Typical installed cost |
|---|---|
| Pressure tank only | $300 to $700 |
| Well pump only (submersible, 100 to 200 ft) | $800 to $1,600 |
| Both replaced same visit | $1,000 to $2,500 |
| Both replaced separately (two visits) | $1,100 to $2,300+ |
Pressure tank cost breakdown
A residential pressure tank (also called a bladder tank or captive-air tank) costs $80 to $400 for the unit, depending on capacity. Standard residential tanks run 20 to 44 gallons and cost $120 to $250 at supply houses. Installation adds $150 to $350, since the plumber or well contractor must drain the system, cut and reconnect lines, set the precharge pressure, and test the system. Total pressure tank replacement cost: $300 to $700.
Signs you need a new pressure tank
- Rapid short-cycling. Pump turns on and off every few seconds rather than holding pressure for minutes between cycles.
- Waterlogged tank. Tank feels heavy and water flows immediately when you tap the Schrader valve (no air precharge).
- Visible rust or corrosion on the tank shell, especially near welds or fittings.
- Tank age over 10 to 12 years. Bladder tanks have similar lifespans to well pumps and often wear out together.
When to replace both at the same time
If your pump needs replacement and the pressure tank is more than 8 years old, replacing both makes financial sense. The marginal cost of adding a new pressure tank when the contractor is already on-site, the system is already drained, and the labor is already charged is much lower than a second standalone tank replacement job 18 months later. Ask your contractor for a combined quote and compare it to the pump-only quote plus a future tank estimate.
Always get quotes from a licensed well pump contractor. Pressure tank sizing matters: too small a tank causes rapid cycling even with a healthy pump, so a contractor should verify the correct gallon capacity for your household demand.
Frequently asked questions
Can I replace only the pressure tank and skip the pump? Yes, if the pump is still healthy. A failed tank bladder is a common standalone repair. The pump assessment should always be part of the service visit to rule out both issues.
What size pressure tank do I need? Sizing depends on pump HP and household demand. A 0.5 HP pump with two to three bathrooms typically needs a 20 to 32-gallon tank. A 1 HP pump serving a larger home may need 44 gallons or more. Your contractor should specify this in the quote.
Does replacing the pressure tank fix low water pressure? It depends on the cause. A waterlogged tank can cause pressure problems, and replacing it often restores normal pressure. If the pump itself is weak, replacing only the tank will not solve the issue.
Bottom line
A combined well pump and pressure tank replacement costs $1,000 to $2,500 installed, less than two separate service visits for most homeowners. If your pump is being replaced and your tank is past mid-life, bundling both makes economic sense. Use our cost calculator to compare scenarios, and get quotes from a licensed well pump contractor who will assess both components before the job.
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