Well Pressure Tank Replacement Cost (2026): Prices by Size + Estimator
A well pressure tank costs about $800 to $1,500 to replace for most homes, with a national average near $1,000 installed, according to HomeGuide. Small tanks swapped by a handy owner can come in under $500.
I have changed a lot of these. The tank itself is rarely the expensive part. Most of the cost is the size you pick, the parts around it and who does the work.
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| Tank size | Tank only | Installed |
|---|---|---|
| 20 to 29 gallon | $200 to $500 | $450 to $1,000 |
| 30 to 39 gallon | $300 to $850 | $550 to $1,350 |
| 40 to 59 gallon | $350 to $1,100 | $600 to $1,600 |
| 80 to 99 gallon | $600 to $1,800 | $850 to $2,300 |
| 100 to 119 gallon | $850 to $2,000 | $1,100 to $2,500 |
Source: HomeGuide, accessed November 2026.
Pressure Tank Replacement Cost Estimator
Choose your tank size and who will install it, then tick any parts you plan to change. Add your pump flow rate and it will also suggest a tank size.
Parts you plan to replace at the same time:
Estimate only. Tank and installed ranges from HomeGuide; part prices are SupplyHouse retail; the call out figure is from HomeAdvisor (all accessed November 2026). Installed part prices from a plumber will be higher than retail.
Not sure of your flow rate? You can measure it in five minutes with a bucket. See how to test well flow rate, then size the tank properly with our pressure tank sizing calculator.
What the Cost Guides Say
The big cost guides do not agree perfectly, because some include larger tanks and harder installs in their ranges. Here is what each one states.
| Source | Stated cost |
|---|---|
| HomeGuide | $800 to $1,500 installed, average $1,000 |
| Angi | About $500 on average, typically $300 to $700, up to $2,500 for large or hard to reach tanks |
| HomeAdvisor | About $500 to $1,000 |
| Bob Vila | $800 to $3,800 |
All accessed November 2026.
Labor is the swing factor. HomeGuide puts labor at $250 to $500 or more, with plumbers charging about $75 to $150 an hour. Angi puts plumber labor for the job at about $125 to $200.
Cost by Tank Type
Three designs are common on private wells. Angi prices them like this:
| Tank type | Typical cost | What to know |
|---|---|---|
| Diaphragm | $200 to $500 for most installs | Fixed rubber diaphragm, costs more up front, long life |
| Bladder | $150 to $400 typical | Replaceable or sealed bladder, the most common type in homes |
| Air over water (single chamber) | $100 to $300 | Cheapest, but air dissolves into the water so it needs regular recharging |
Old galvanized air over water tanks are the ones I replace most often. Owners get tired of draining them every few months to restore the air cushion.
Brand matters less than size and build. We compared the three big names in Well-X-Trol vs Flexcon vs Water Worker.
Parts to Replace at the Same Time
When the tank is off the wall, the parts around it are cheap to change. This is when I swap anything that is old or corroded.
| Part | Retail price | Installed (HomeAdvisor) |
|---|---|---|
| Pressure switch (Square D 30/50 or 40/60) | $28 to $36 | $120 to $180 |
| Pressure gauge | $10 to $30 | $100 to $180 |
| Check valve, 1 inch | $21 to $26 | Not stated |
| Tank tee package (tee, gauge, relief valve, drain) | $79 to $264 | Not stated |
Retail prices from SupplyHouse, November 2026.
A new switch is worth it on any switch older than the tank. Pitted contacts cause the same short cycling a bad tank does. Our guide to well pressure switch settings covers the adjustment.
Signs Your Pressure Tank Is Failing
- The pump clicks on every time you open a tap. That is short cycling, and a waterlogged tank is the usual cause.
- The tank sounds solid when you knock on the top. A healthy tank sounds hollow at the top.
- Water pressure surges and drops at the faucet.
- Water comes out of the air valve when you press the core. The bladder has failed.
- Rust or leaks on the tank shell.
Amtrol says a tank with low or no air may need to be replaced, and warns against simply adding air if you also see corrosion or a shorter pump cycle. Those can be signs of internal failure (Amtrol support).
Short cycling kills pumps fast. If the pump is already struggling, read well pump short cycling and signs your well pump is going bad before you spend money on a tank.
Most tanks last 10 to 15 years, according to HomeGuide. Angi gives a shorter 7 to 10 years for typical use.
Set the Pre Charge on the New Tank
This is the step most people skip, and it is why new tanks sometimes behave like old ones. Amtrol’s Well-X-Trol manual says to set the pre charge 2 psi below the pump cut in pressure.
- Turn off power to the pump.
- Open a tap and drain the system until no water flows.
- Check the air pressure at the valve on top of the tank with a tire gauge.
- Add or release air until it reads 2 psi below cut in. That is 28 psi for a 30/50 switch and 38 psi for a 40/60 switch.
- Close the tap, restore power and watch one full pump cycle.
Amtrol says to adjust the pre charge only when the tank is empty of water and the system is off (Well-X-Trol manual).
Can You Replace a Pressure Tank Yourself?
Yes, if you are comfortable with basic plumbing. A 20 to 32 gallon tank is a half day job for a careful owner, and doing it yourself saves the $250 to $500 labor.
Large tanks are different. An 86 or 119 gallon tank full of water is very heavy, so drain the old one completely and get help moving it. Always kill the breaker first and relieve all pressure before you loosen a fitting.
Pressure Tanks Worth a Look
These are the sizes I install most. Pick by drawdown and pump flow, not by the number on the old tank.
Amtrol Well-X-Trol WX-203 (32 gallon)
A common choice for a typical house on a 7 to 10 GPM pump. Diaphragm design on a Durabase stand.
- 32 gallon total volume
- Steel shell, diaphragm
- Fits most 1 inch tank tees
Proven design that most contractors know well.
Costs more than value brands.
Amtrol Well-X-Trol WX-202 (20 gallon)
Good for a cabin, small house or as a second tank to add drawdown.
- 20 gallon total volume
- Durabase stand
- Easy to move and fit
Light enough for one person to fit.
Too small on its own for most family homes.
Amtrol Well-X-Trol WX-302 (86 gallon)
For 12 GPM and larger pumps, irrigation or large households that need long pump runs.
- 86 gallon total volume
- Steel shell, diaphragm
- Long pump run times
Long pump cycles protect the motor.
Heavy and needs floor space.
Water Worker HT-20B (20 gallon)
A lower cost tank for small systems and budget replacements.
- 20 gallon total volume
- Pre charged from the factory
- Vertical tank
Lower price.
Check the pre charge before installing.
See all our picks in best well pressure tanks.
Frequently Asked Questions
How much does it cost to replace a well pressure tank?
Most homes pay about $800 to $1,500 installed, with a national average near $1,000, according to HomeGuide. Small tanks cost less and 80 to 119 gallon tanks can reach $2,500.
How long does a well pressure tank last?
HomeGuide puts it at 10 to 15 years on average. Angi says 7 to 10 years for typical use and longer with good care.
What should the air pressure be in my well pressure tank?
Set it 2 psi below your pump cut in pressure with the tank empty of water. That is 28 psi for a 30/50 switch and 38 psi for a 40/60 switch.
Can a bad pressure tank damage my well pump?
Yes. A waterlogged tank makes the pump start and stop many times a minute, which overheats the motor and wears out the switch.
Should I replace the pressure switch with the tank?
It is a good idea if the switch is old. A new switch costs about $28 to $36 retail and it is quick to fit while the system is drained.
Sources (accessed November 2026): HomeGuide; Angi; HomeAdvisor; Bob Vila; Amtrol; SupplyHouse.
