Pressure tank
Sized by drawdown so the pump rests. A waterlogged tank is why pumps die. The well page prices the pump with it.
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Pressure tank · Storage · Cistern · Not the heaterWater storage and pressure tank cost calculator
A well pressure tank commonly costs $600 to $2,000 installed. A few-hundred-gallon storage tank is often $1,000 to $2,500. A larger cistern, set and piped, often starts around $2,500 to $7,000 before excavation gets difficult. None of these heat water. If the tank you mean has a burner, a flue or an element, use the water heater calculator.
Reviewed 25 October 2026 · Written by Mantu Kumar
See the photo · See the cost diagram · Open the calculator
Written and maintained byMantu Kumar
Evidence review17 October 2026
Calculation rulesRead the methodology
Quality standardEditorial policy
Key facts at a glance
- Pressure tank, 20–40 gallons: often $600–$2,000 installed.
- Large 80-gallon-plus tank: often $1,500–$3,500.
- Atmospheric storage, a few hundred gallons: about $1,000–$2,500 plumbed, not buried.
- Cistern: about $2,500–$7,000 for a modest installed tank, more once excavation, a pad and a booster are real.
- A water heater is a different appliance with a different life and a different insurance question.
2026 equipment-and-install planning bands. Buried cisterns and fire-protection tanks are outside the default.
2026 planning ranges
- 1Poly tank 500 gal · $1,000–$2,500 installed
- 2Level pad or base
- 3Vent, overflow & float
- 4Underground cistern · $2,500–$5,000
- 5Booster pump to the house
- 6Pressure tank · $600–$2,000 installed
- 7Fittings + air charge
- 8Small, typical or large
- 9Freeze protection
- Pressure stops the pump short-cycling.
- Storage holds volume.
- Heater makes hot water. Wrong page.
Water tank estimator
No email · nothing sentDiagram, part by part
Water storage and pressure tank: every numbered part explained
The water storage and pressure tank drawing above has 9 numbered parts, from Poly tank 500 gal to Freeze protection. Each card below frames one of them, and after you run the calculator it shows what that part adds to your estimate.
1 Poly tank 500 gal
$1,000–$2,500 installed
Polyethylene tanks are light, rust-free and priced by capacity, installed above ground. Dark, UV-stabilized tanks keep algae and sunlight damage down.
What moves it: Capacity, material and location.
On the quote: Ask for the tank material, UV rating and whether it is rated for drinking water.
2 Level pad or base
Part of an outdoor tank
A level, compacted pad of gravel or concrete keeps a full tank from cracking or tipping. Water weighs about 8.3 pounds per gallon, so a full tank is very heavy.
What moves it: Tank size and soil.
On the quote: Check the pad size and thickness.
3 Vent, overflow & float
Part of the tank setup
Screened vents, an overflow pipe and a float valve control filling and keep insects and animals out.
What moves it: Fill source and tank type.
On the quote: Ask where the overflow drains.
4 Underground cistern
$2,500–$5,000
Underground cisterns need excavation, a tank rated for burial, access risers and backfill. Rock or a high water table adds cost.
What moves it: Size, soil and access for equipment.
On the quote: Ask about excavation and whether the tank needs anchoring.
5 Booster pump to the house
A booster pump moves water from the tank to the house at usable pressure, with its own electrical circuit.
What moves it: Distance, height and household demand.
On the quote: Check pump size and whether it is on a dedicated circuit.
6 Pressure tank
$600–$2,000 installed
A pressure tank stores water under pressure so the pump does not start for every glass. A larger tank means fewer pump starts and longer pump life.
What moves it: Household size and pump flow.
On the quote: Ask for tank size in gallons and the drawdown.
7 Fittings, switch and air charge
$80–$220
The tank connects through a tank tee with gauge, drain and relief valve. The air charge is set just below the pump cut-in pressure, and the pressure switch is checked.
What moves it: Tank type and the existing fittings.
On the quote: Ask that the air charge be set and the switch tested before the plumber leaves.
8 Tank size
Sets the tank price
Pressure tanks run from about 20 to 119 gallons, and storage tanks from a few hundred to thousands of gallons. Size follows household use, pump flow and how much storage you need.
What moves it: Household size, water source and pump flow.
On the quote: Ask the installer to size the tank for your pump and household.
9 Freeze protection
Needed outdoors in cold areas
Above-ground tanks and exposed pipes can freeze. Burying lines below the frost line, insulating or heating exposed pipe, or placing the tank indoors prevents winter damage.
What moves it: Climate and where the tank sits.
On the quote: Ask how exposed lines will be protected from freezing.
Storage, not heat
Name the tank before you price it
The large tank stores water. The small tank beside it is a pressure vessel. A quote that says “tank” without saying which one cannot be compared, and it cannot be matched to an insurance form either.
Three different replacements. These close-ups are crops of the same AI-generated illustration.
Storage
Atmospheric tanks need a vent, an overflow and a fill control. They are not pressurized, and they are not potable just because they are plastic.
Cistern
Excavation, a pad, a booster pump and frost depth move this out of the small-tank band fast.
Before you sign a quote or file a claim, verify these three details
- Which tank
- Pressure, storage or cistern, in writing.
- Potable
- NSF or equivalent if anyone will drink it.
- Pump
- Whether a booster or the well pump is in the same invoice.
On this page
- 2026 tank costs
- Which tank
- Worked example
- Insurance
- Water tank cost by region
- What “Tank” does to the price
- What “Size” does to the price
- How age changes the water tank claim payout
- Quote checklist: 6 items to verify
- How long the job takes
- Common mistakes that raise the cost
- Ways to keep the cost down
- Signs a pressure tank is failing
- Sources
- Questions
Water tank cost (2026)
| Tank | Installed range | Not included |
|---|---|---|
| Pressure, smaller | $350 – $900 | The well pump |
| Pressure, larger bladder | $500 – $1,400 | Constant-pressure drive |
| Storage, a few hundred gallons | $1,000 – $2,500 | Burial |
| Modest cistern package | $2,000 – $7,000 | Hard excavation |
| Water heater | Other calculator | Fuel, flue, anode |
Do not price a heater here
People say “water tank” and mean four objects. The pressure tank on a well. A storage tank that gives a low-yield well somewhere to put water. A cistern that catches rain or holds a delivery. And the water heater in the closet. Only the last one has a recovery rate and a flue. Mixing them produces a useless estimate and a confused claim.
Pressure tanks fail when the bladder ruptures. The pump then starts constantly, and the electric bill is the clue. Storage tanks fail at fittings, sunlight and algae. Cisterns fail at the excavation and the booster. Heaters fail at the tank, the elements or the burner. Pick the row that matches the object in the room.
Worked example: a typical well pressure tank, pump stays
Bladder tank only
Worked example| Line | Range |
|---|---|
| Pressure tank, 44–86 gal, installed | $600 – $2,000 |
| Fittings, switch check and air charge | $80 – $220 |
| Planning total | $680 – $2,220 |
If the pump also has to come up, switch to the well pump calculator instead of adding a guess. A 300-gallon storage tank on this tool is a different scope, often $1,000–$2,500 above grade. A $1,000 deductible eats a tank-only loss on most policies unless more of the system died in the same event.
What a policy does with a tank
- Wear of a bladder is maintenance.
- Lightning that kills a pump and a pressure switch can include the tank if it was damaged, as part of that electrical loss. A tank you were going to replace anyway is not pulled in for free.
- Freezing depends on the form and on whether the space was heated. An unheated well house is a common denial.
- A new cistern is an improvement. It is not a claim because the well runs low in August.
Water tank cost by region
The calculator's default water tank job, repriced for each of its six regions. At the national average it runs $680 – $2,220; South / Lower Midwest is the lowest at $592 – $1,931, and West Coast metro is the highest at $884 – $2,886, a gap of about $624 at the midpoint.
| Region | Planning range | Midpoint |
|---|---|---|
| National average | $680 – $2,220 | $1,450 |
| South / Lower Midwest | $592 – $1,931 | $1,262 |
| Mountain / Plains | $646 – $2,109 | $1,378 |
| Mid-Atlantic / Upper Midwest | $762 – $2,486 | $1,624 |
| Northeast metro | $857 – $2,797 | $1,827 |
| West Coast metro | $884 – $2,886 | $1,885 |
What “Tank” does to the price
Every other input stays at its default and only “Tank” changes. The cheapest choice, Well pressure tank, comes to $680 – $2,220; the most expensive, Buried cistern, comes to $3,700 – $9,700.
| Choice | Planning range | Midpoint vs default |
|---|---|---|
| Well pressure tank (default) | $680 – $2,220 | — |
| Above-grade storage tank | $1,150 – $3,000 | +$625 |
| Buried cistern | $3,700 – $9,700 | +$5,250 |
What “Size” does to the price
Every other input stays at its default and only “Size” changes. The cheapest choice, Small (20–40 gal pressure, under 500 gal storage), comes to $530 – $1,720; the most expensive, Large (119 gal pressure, 2,500+ gal storage), comes to $1,040 – $3,420.
| Choice | Planning range | Midpoint vs default |
|---|---|---|
| Small (20–40 gal pressure, under 500 gal storage) | $530 – $1,720 | −$325 |
| Typical (44–86 gal pressure, 500–1,500 gal storage) (default) | $680 – $2,220 | — |
| Large (119 gal pressure, 2,500+ gal storage) | $1,040 – $3,420 | +$780 |
How age changes the water tank claim payout
Using the default job, a $1,000 deductible and a 12-year expected life. At 10 years old, about $1,160 is held back as depreciation; a replacement cost policy releases it after the work is finished, while an actual cash value policy keeps it.
| Age | Wear | First check | Held back |
|---|---|---|---|
| 2 years | 17% | $208 | $242 |
| 5 years | 42% | $0 | $604 |
| 10 years | 80% | $0 | $1,160 |
| 15 years | 80% | $0 | $1,160 |
| 20 years | 80% | $0 | $1,160 |
| 30 years | 80% | $0 | $1,160 |
Quote checklist: 6 items to verify
Tank quotes vary more in what they leave out than in the tank price. Line these up before you compare.
- Tank type and size. Pressure, storage or cistern, with gallons and drawdown for a pressure tank.
- Tank material and rating. Bladder or diaphragm tanks for pressure; potable-rated polyethylene or concrete for storage.
- Pad or base. Gravel or concrete pad size for outdoor tanks, and anchoring if the tank is buried.
- Fittings and settings. Tank tee, gauge, relief valve, and the air charge set to the pump cut-in pressure.
- Pump and electrical. Booster pump size and whether a dedicated circuit is included.
- Excavation and restoration. Digging, backfill, rock allowance and lawn repair for a cistern.
How long the job takes
| Stage | Typical time | What happens |
|---|---|---|
| Site visit and quote | 1 hour | Measures, checks the pump and decides tank size. |
| Ordering the tank | 0 – 10 days | Pressure tanks are stocked; large storage tanks are shipped. |
| Pressure tank swap | 2 – 4 hours | Drain, replace, set air charge and test. |
| Storage tank or cistern | 1 – 3 days | Pad or excavation, setting the tank, piping and pump. |
| Inspection | 0 – 14 days | Only some towns inspect tank work. |
Keep a few gallons of bottled water on hand for the swap day, since the water is off while the tank is replaced.
Common mistakes that raise the cost
- Buying by price alone. An undersized pressure tank makes the pump cycle constantly and wear out early.
- Skipping the air charge. A new tank set at the wrong pressure behaves like a small one.
- No pad outdoors. A full storage tank on soft ground can crack or tip.
- Ignoring freezing. Exposed lines and fittings split in the first hard freeze.
- Non-potable tanks. Storage for drinking water should be rated for it.
Ways to keep the cost down
Tanks last longer and cost less with the right size and care.
- Size for the pump. Avoids short cycling.
- Check the air charge yearly. Extends tank and pump life.
- Install indoors where possible. Avoids pads and freeze protection.
- Replace fittings with the tank. Prevents a second visit.
- Compare tank brands. Warranties differ.
- Plan cisterns with access. Excavation costs depend on access.
Signs a pressure tank is failing
Check the tank before replacing the pump.
- Pump cycling rapidly. Waterlogged tank.
- Pressure swings at taps. Lost air charge.
- Water from the air valve. Failed bladder.
- Rust or leaks. Tank corrosion.
- Knocking pipes. Pressure surges.
Sources and further reading
- NAIC — Actual cash value vs replacement cost coverage
- ReplaceCost water heater calculator
- HomeGuide — Water tank replacement cost
Frequently asked questions
How much does a well pressure tank cost?
About $600 to $2,000 installed for a common bladder tank. The pump is separate.
How much is a water storage tank?
A few-hundred-gallon above-grade tank is often $1,000 to $2,500 plumbed. Buried cisterns cost more.
Is a pressure tank a water heater?
No. It stores pressure so the pump can rest. Hot water is the water heater calculator.
How long does a pressure tank last?
Often 5 to 15 years. The calculator uses 12 years for ACV on a pressure tank and 25 on storage.
Does insurance cover a pressure tank?
Wear, no. Sudden covered damage, sometimes, and the deductible often exceeds the tank.
Can I use a storage tank for drinking water?
Only if it is rated for potable water and the plumbing protects it. The calculator does not certify that.
How much does a cistern cost?
A modest cistern that is set, plumbed and connected usually costs about $2,500 to $7,000. The price climbs once the tank is buried, because excavation, a level pad or bed, anchoring and a booster pump become real lines on the quote. A few-hundred-gallon above-ground storage tank is cheaper, about $1,000 to $2,500 plumbed. Large buried cisterns and fire-protection tanks are engineered jobs and sit outside this calculator.
What size pressure tank do I need?
Size follows pump flow and household use. Many homes use a 20 to 44 gallon tank, which holds only a fraction of that as usable drawdown. A larger tank means fewer pump starts, which helps the pump last longer.
Why does my well pump turn on and off quickly?
Rapid cycling usually means the pressure tank has lost its air charge or its bladder has failed. Checking the air pressure with the water off is the first step before replacing the pump.
Can a storage tank sit outside in winter?
Only with freeze protection. Buried lines, insulated or heated pipe and a tank sized so water keeps moving all help; in cold climates many storage tanks sit in a garage or well house.
What is drawdown?
Drawdown is the amount of water a pressure tank delivers between the pump shutting off and starting again. It is much smaller than the tank's total size, often about a third or less.
How do I check the air charge?
Turn off the pump, drain the system, then check the air valve on top of the tank with a tire gauge. The pressure should be set about 2 psi below the pump's cut-in pressure.
Can I add a second pressure tank?
Yes. Two tanks piped together increase drawdown and reduce pump starts. It can be cheaper than a single large tank when space is tight.
How big should a cistern be?
It depends on daily use and how the cistern is filled. Households that rely on hauled water often size for a week or more of use; rainwater systems size for dry spells.
Does a storage tank need a booster pump?
Usually yes, unless the tank sits high enough above the house to create pressure by gravity. A booster pump and small pressure tank deliver normal pressure.
Do tanks need a permit?
Pressure tank swaps rarely do. Buried cisterns, large storage tanks and new pump circuits may need permits, depending on local rules.
What is a tank tee?
A tank tee is the fitting at the tank inlet that holds the pressure switch, gauge, relief valve and drain in one place, making service easier.
Where should a pressure tank be installed?
Near where the well line enters the house or well house, in a space that stays above freezing, with room around the tank tee to service the switch, gauge and drain.
What pressure should a well system run at?
Common pressure switch settings are 30/50 or 40/60 psi. The tank's air charge is set about 2 psi below the lower number.
Do storage tanks need cleaning?
Yes. Potable storage tanks and cisterns should be inspected and cleaned periodically to remove sediment and check for growth, following the tank maker's guidance.
Related planning tools
Next steps for your estimate
Use the companion calculators when the job touches another part of the house or the claim.
Water heater calculatorTank and tankless heaters.Well pump calculatorThe pump at the bottom of the well.Water filter calculatorTreatment after the tank.Repiping calculatorPipes inside the house.Generator calculatorPower for a booster in an outage.Claim gap calculatorWhether a small tank clears the deductible.
Key topics covered
Popular water tank searches answered on this page
Planning topics covered in the calculator and guide above.
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