Exploring
For most private wells the Amtrol WX-202 is the best well pressure tank — the reference 20 gallon tank with the longest track record. The WaterWorker HT-30B is the pick when you need more drawdown for a bigger household, and the Red Lion RL20A is the value option.
How We Picked
We compared pre-charged well pressure tanks on drawdown (the water you actually get between pump cycles, which is far less than the tank's nominal gallons), diaphragm design, liner material, and how many owners report multi-year service rather than an early failure. All three are pre-charged diaphragm tanks — the modern standard, and far less trouble than an old galvanized tank that waterlogs. If you are building out a well system, see our guides to solar well pumps, water storage tanks, and whole house water filters.
1. Best Overall: Amtrol WX-202 Well-X-Trol 20 Gallon Pressure Tank
Amtrol WX-202 Well-X-Trol 20 Gallon Pressure Tank
Amtrol
- 20 gallon vertical, free-standing tank
- Butyl diaphragm keeps water off the steel shell
- Pre-charged and ready to install
- The reference tank in residential well systems
- 4.8★ from 653 owners
Why we picked it: Amtrol's Well-X-Trol line is what well contractors install by default, and the WX-202 is the size that fits most households. The design detail that matters is the diaphragm: water never touches the steel shell, so the tank does not waterlog or rust from the inside the way older galvanized tanks did. Owners routinely report a decade or more of service, which is the only number worth much in this category. If your pump is short-cycling on a tank you inherited with the house, this is the straightforward replacement.
2. Best Large Capacity: WaterWorker HT-30B 30 Gallon Vertical Pressure Well Tank
WaterWorker HT-30B 30 Gallon Vertical Pressure Well Tank
Water Worker
- 30 gallon tank, 26 gallon capacity rating
- More drawdown means fewer pump starts
- Heavy-gauge steel shell with butyl diaphragm
- Stands on its own base
- 4.4★ from 344 owners
Why we picked it: Bigger is genuinely better here, within reason. A larger tank stores more water between pump starts, and pump life is governed almost entirely by how many times it starts — not by how long it runs. If you have a larger household, a long run to the well, or a pump you would rather not replace again, moving up to 30 gallons meaningfully reduces cycling. The trade-off is footprint and weight, so measure the well house before ordering.
3. Best Value: Red Lion RL20A Vertical Pre-Charged Well Pressure Tank (20 Gallon)
Red Lion RL20A Vertical Pre-Charged Well Pressure Tank (20 Gallon)
Red Lion
- 20 gallon vertical, pre-charged
- 1" FNPT connection
- Red Lion is an established pump-industry brand
- Straight swap for most 20 gallon tanks
- 4.6★ from 103 owners
Why we picked it: Red Lion built its name on well pumps, and its tanks are the sensible budget choice from a company that actually works in this category rather than a marketplace label. At 20 gallons it is a direct alternative to the Amtrol at a lower price, with the same basic pre-charged diaphragm construction and a standard 1 inch connection that matches most existing plumbing. Fewer owner reports than the Amtrol, but a strong rating and a real brand behind it.
Comparison Table
| Pick | Tank | Capacity | Type | Best for |
|---|---|---|---|---|
| Best Overall | Amtrol WX-202 | 20 gallon | Butyl diaphragm, vertical | Best for most households |
| Best Large Capacity | WaterWorker HT-30B | 30 gallon | Vertical, butyl diaphragm | Best for larger households |
| Best Value | Red Lion RL20A | 20 gallon | Pre-charged, 1 in. FNPT | Best budget replacement |
What to Look For
Drawdown, not tank size. A 20 gallon tank does not give you 20 gallons of water. Drawdown — the usable water between the pump's cut-in and cut-out pressures — is typically a third to a half of nominal volume. Size on drawdown, and when in doubt go one size up.
Match the pre-charge to your pressure switch. The tank's air pre-charge should sit about 2 psi below the pump's cut-in pressure. On a common 30/50 switch that means roughly 28 psi. Check it with a tire gauge on the schrader valve with the system drained, or the tank will never work correctly.
Diaphragm or bladder. Both keep water off the steel. Diaphragm tanks are the common residential design and are effectively serviceable for their life; bladder tanks let you replace the bladder on some models. Either beats an old galvanized tank that mixes air and water directly and waterlogs.
Short cycling is the symptom to watch. If the pump kicks on every few seconds while a tap runs, the tank has lost its air charge or the diaphragm has failed. Running a pump like that will destroy it — diagnose the tank before you replace the pump.
Bottom Line: Which Should You Buy?
For most people: the Amtrol WX-202. Best for most households.
Best value: the WaterWorker HT-30B. Best for larger households.
Also consider: the Red Lion RL20A. Best budget replacement.
Ready to buy?
Jump straight to our top picks on Amazon — prices shown at click-through.
Frequently Asked Questions
What size well pressure tank do I need?
Size on drawdown rather than nominal gallons, and match it to your pump's flow rate so the pump runs at least a minute per cycle. A 20 gallon tank suits most households; larger homes, higher flow pumps, or long runs to the well do better on 30 gallons or more.
How long does a well pressure tank last?
A quality pre-charged tank commonly lasts eight to fifteen years. The usual cause of early failure is running it at the wrong pre-charge pressure, which flexes the diaphragm far more than it was designed for.
What pressure should my well tank be set at?
Set the air pre-charge about 2 psi below the pump's cut-in pressure — roughly 28 psi for a 30/50 switch, or 38 psi for a 40/60. Always check it with the system drained of water, or the reading will be meaningless.
Why is my well pump short cycling?
Almost always the pressure tank. Either it has lost its air charge or the diaphragm has ruptured and the tank has waterlogged. Both mean there is no air cushion left to store pressure, so the pump switches on and off constantly.
Can I install a well pressure tank myself?
If you are comfortable with basic plumbing, yes — it is a tank, a tee, a pressure switch, and a gauge. Shut off the pump breaker and drain the system first, and check the pre-charge before you fill the new tank.
Related Guides
How We Research
Picks are based on manufacturer specifications, current Amazon availability, and patterns across verified owner reviews. Specs, capacities, and included accessories vary by listing — confirm the current details at the retailer before buying.
Note: Kill the pump breaker and drain the system before touching the tank, and always check the air pre-charge with the tank empty of water — a tank charged against a full system reads high and will short-cycle the pump.