Replacing your pressure tank is the cheapest way to protect the most expensive part of your system. When a tank loses its pressure cushion, it forces your pump to turn on and off every few seconds until the motor burns out. At Fayetteville Well Pump Repair, we size your replacement on measured drawdown rather than the total volume printed on the tank label. (See our full breakdown on our well pump cost page.)
Your pressure tank works like a spring. Air trapped behind a diaphragm compresses as the pump fills the tank, then pushes that water back out as you run a faucet, and your pump only restarts once the stored pressure drops to cut-in. Everything useful your tank does happens inside that band.
This is why people misread the number on the label. An 86 gallon tank does not hold 86 gallons of usable water. Across a 40/60 psi band you get roughly a quarter of that before the pump restarts, which means a large tank charged wrong delivers less usable water than a smaller one charged right.
Signs your tank is failing right now
- Rapid clicking Your pressure switch clicks on and off rapidly while a faucet is running.
- Pulsing water pressure Shower water surges from high to low pressure repeatedly.
- Continuous running Your pump turns on every single time someone flushes a toilet or washes their hands.
- Water spilling or sweating Water leaks around the base of the tank or spurts from the top air valve, which is a ruptured diaphragm.
Don't let a $1,000 to $2,300 tank failure burn out a $2,500 pump
If your pump is short-cycling, delaying replacement for a few weeks can ruin your pump motor. We stock heavy-duty Amtrol Well-X-Trol tanks on our trucks.
What is actually wrong
The diaphragm has failed
Water crosses into the air chamber, rendering the tank 100% waterlogged. Factory-sealed tanks cannot be patched. We stock replacement tanks on our trucks to swap them out before rapid cycling burns out your pump.
The tank is sound but undersized
Sizing a 20 gal tank behind a 1 HP pump destroys motors through relentless short cycling. We size replacement tanks to guarantee a full minute minimum run time per cycle. If space in your well house is tight, we can retrofit a Cycle Stop valve to hold steady pressure without forcing a massive tank build.
The metal shell has corroded through
Condensation in unconditioned well houses rusts steel tanks from the outside in. If you see a damp seam at the base, the shell is close to letting go, and when it goes it floods the well house or the basement. Replacing it on your schedule for $1,000 to $2,300 beats paying for water restoration later.
Replacing tank, switch and fittings as a single unit
Screwing a new tank onto fifteen-year-old corroded fittings and a tired Square D Pumptrol switch is how budget installers guarantee a callback. We replace the entire tank tee manifold, gauge, switch and relief valve as a single unit so your whole pressure control system is brand new.
How we work it out
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Confirm the tank is the fault
We drain the system and read the Schrader valve. Air means the charge is simply low and we recharge it. Water means the diaphragm has gone and your tank is finished.
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Read the working band
We measure actual cut-in and cut-out at the tank tee rather than trusting the label on the switch. We set your pre-charge against that measured figure, because that is what your tank actually works against.
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Size on drawdown and run time
We take your pump output against a minimum run time to get the drawdown you need, then choose the tank from that. Physical volume comes out of the calculation rather than going into it.
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Set the charge before it holds water
We set the pre-charge 2 psi below cut-in with your tank empty. If we charged it after filling, the reading would mean nothing and the cycling would start on day one.
What a tank replacement should include and usually does not
The pre-charge figure, recorded
A job sheet naming your cut-in and the pre-charge set against it is something you can check in a year. Without those two numbers you have no way to tell whether your tank was commissioned properly or simply bolted on, so ask for them and keep them. We record both figures on your invoice so you can verify them years down the road.
We check your pump afterwards
A tank that failed months ago has been cycling your motor the whole time. We run insulation resistance on the Franklin Electric motor once the new tank is in, because a $1,500 to $2,500 motor that is already damaged will fail regardless of what we just fitted.
Disinfect anything we opened
Opening your plumbing exposes your water lines to whatever is sitting in the well house. Following National Ground Water Association (NGWA) guidance, we sanitize everything we break open and recommend submitting a sample to the Cumberland County Health Department after any work that opens your pipework.
Numbers worth knowing
| Installed range | $1,000 to $2,300 |
|---|---|
| Pre-charge | 2 psi below cut-in |
| Standard band | 40/60 psi |
| Sizing basis | Drawdown, not volume |
| Minimum pump run | 1 minute per cycle |
| Replaced with tank | Tee, switch, gauge |
Well pump work in Fayetteville runs $150 to $3,500 for most homes. What decides the number is whether the fault sits outside the well or in it, and how deep the pump hangs.
| What the job is | Typical range | Unit |
|---|---|---|
| External component: pressure switch, control box, wiring, primingThe pump itself is fine. Cheapest outcome and the most common one. | $150 – $500 | installed |
| Pressure tank replacementTank, tank tee, gauge, switch and fittings, sized on drawdown. A waterlogged tank is what makes a pump short-cycle. | $1,000 – $2,300 | installed |
| Shallow well or jet pump, to about 25 ftCommon on Coastal Plain sand wells, where the water table sits high enough that a jet pump still works. | $600 – $1,400 | installed |
| Deep submersible pump, well 100 to 200 ftTypical Fayetteville well depth. Price covers pulling the old pump, drop pipe and wire. | $1,500 – $2,500 | installed |
| Deep submersible pump, well 300 to 400 ft or higher horsepowerDepth drives horsepower and hoist labor together. Every extra 100 ft adds roughly $500 to $1,000 in pipe, wire and time. | $2,800 – $5,500 | installed |
| Full system replacement: pump, tank, wiringWorth doing together when the pump is original and the tank is the same age. | $3,500 – $6,000 | installed |
What moves the number
- Every additional 100 ft of well depth+$500 to $1,000
- Emergency, weekend or after-hours call+25% to 50%
The tank is a few hundred dollars. The pump it protects is a few thousand. People replace them in the wrong order surprisingly often.Cumberland County, NC
Who we work for
- Well and Pump Service for Farms Stock water, wash-down, irrigation and a farmhouse on one well. Sized on sustained draw, not acreage.
- Well Service for Mobile Home Parks Shared supply with tenants attached. Past 15 connections it stops being a private well at all.
- Well Service for Churches and Camps Idle most of the week, then a full building. The hardest duty cycle in private water supply.
Want it priced properly?
On-site estimates are free, itemized, and written down before any work starts.
Questions we get asked
How much does pressure tank replacement cost?
$1,000 to $2,300 installed covers the tank, the tank tee and the fittings on a typical residential well. That figure sits well below the $1,500 to $2,500 a submersible costs, which is the reason the tank is worth replacing promptly.
How do I know if my pressure tank has failed?
Two checks settle it. Tap the shell and listen for where the tone changes, then release air at the Schrader valve with the system drained. If water comes out of the valve, the diaphragm has failed and you need a new tank.
What size pressure tank do I need?
We size for at least 1 minute of pump run time per cycle, working back from your pump's output. The gallon figure on the label is nominal volume, and usable drawdown is a fraction of it.
What should the pre-charge be set to?
2 psi below cut-in, measured with the system drained. On a standard 40/60 psi band that is 38 psi, and getting it wrong shrinks usable drawdown enough to start the pump cycling immediately.
Who replaces well pressure tanks near me?
Fayetteville Well Pump Repair replaces pressure tanks across Fayetteville and Cumberland County, sizing on measured drawdown and setting the pre-charge against the actual cut-in rather than the switch label.
How long does a pressure tank last?
10 to 15 years is typical, and less in an unconditioned well house where condensation attacks the base seam. A tank charged correctly at install reliably outlasts one that was never commissioned.
If your pump is clicking on and off while a tap runs, call. A tank costs you $1,000 to $2,300 and the pump it has been wearing out costs $1,500 to $2,500, so we do not let a tank job wait.
If the cycling has been going on a while, short cycling covers what that does to a motor, and pressure switch replacement covers the other half of the assembly.