What your pressure tank and pressure switch actually do 

Your well pump doesn't run every time you open a faucet. Instead, it fills the pressure tank, where a cushion of compressed air pushes water out to your fixtures. The pressure switch watches that pressure. When it falls to the "cut-in" setting (commonly 30 or 40 PSI), the switch starts the pump; when it reaches "cut-out" (commonly 50 or 60 PSI), it shuts the pump off.

When either part fails, the pump starts and stops far more often than it should. That's called short cycling, and it's the fastest way to burn out a well pump. A pressure tank or switch is a few-hundred-dollar repair compared with a pump pulled from the well, so it pays to catch the problem early.

 Signs you need a new pressure tank or pressure switch 

Pressure tank warning signs

  • Rapid clicking near the tank, with the pump kicking on after just a few seconds of running water.
  • Pressure that pulses or swings high and low in the shower.
  • Water comes out of the air valve on top of the tank when you press it. That means the internal bladder has ruptured and the tank is done.
  • The tank sounds or feels full all the way to the top when you knock on it (a "waterlogged" tank).
  • Rust, sweating, or leaks at the base or seams, which is common on older steel tanks in damp Shore crawlspaces and basements.
  • The tank is 10+ years old and you're seeing any of the above.

Pressure switch warning signs

  • No water, but the breaker is on and tapping the switch gets the pump running again.
  • The pump won't shut off, or pressure climbs past its normal range.
  • Chattering or buzzing from the switch as the pump starts.
  • Burnt, pitted, or blackened contacts under the cover (our technician checks these; please don't open a live switch yourself).
  • Ants or insects inside the switch. This is surprisingly common in rural Eastern Shore homes, especially where the switch sits near a well pit or outdoor wellhead.

No water right now? Call 410-739-2919. If it's after hours, turn off the breaker for the well pump to protect it until we can get there.

 Why Eastern Shore wells are hard on tanks and switches 

Shore wells are drilled into sandy Coastal Plain aquifers, not bedrock, and that shows up in the equipment. Here's what we see most around Queenstown, Kent Island, Easton, and down the Shore:

  • Iron and sediment clog the pressure switch. The small tube and fitting that feed the switch its pressure reading can plug with iron, sand, or slime from iron bacteria. The switch then "reads" the wrong pressure, and the pump short cycles or won't shut off. Sometimes a new switch is only half the fix; the underlying iron problem needs attention too (see our iron page).
  • Sulfur gas corrodes electrical contacts. The same hydrogen sulfide that causes the rotten-egg smell in many Dorchester and Talbot wells tarnishes copper and switch contacts, shortening their life.
  • Humid crawlspaces and well pits rust steel tanks and electrical parts faster than in drier climates.
  • Storm outages and surges. Nor'easters and summer thunderstorms bring flickering power that pits switch contacts.
  • Older farmhouses and waterfront homes often still have galvanized "air-over-water" tanks with no bladder. These lose their air charge over time and waterlog constantly. Swapping to a modern bladder tank usually ends the cycle.
  • Seasonal homes in St. Michaels, Oxford, Rock Hall, and on the water sit unused for months. Tanks lose air, switches corrode, and problems show up the first weekend everyone arrives.

 How we handle a pressure tank or switch call 

  1. Diagnose before we replace. We check the tank's air pre-charge, look for a failed bladder, inspect the switch contacts and pressure-sensing port, and watch a full pump cycle. Sometimes the tank only needs its air charge reset, and we'll tell you if that's the case.
  2. Size the tank to your pump and household. A tank that's too small is a common reason pumps short cycle. We size the new tank so your pump gets a healthy run time each cycle, not just whatever fits the space.
  3. Install it right. New tank tee, new pressure gauge, and new pressure switch as a set (the switch is inexpensive and it's the most common part to fail next), plus a clean, leak-free drain and relief setup. We haul away the old tank.
  4. Set and test. We set the tank's air pre-charge to 2 PSI below the switch's cut-in pressure, adjust cut-in and cut-out, and run the system until it cycles cleanly.
  5. Walk you through it. You'll know your settings, what normal looks like, and what to watch for next time.

 Low pressure isn't always the tank 

Because we're also a water treatment company, we check the whole path from the well to your faucets. A clogged sediment filter, an overdue filter cartridge, or an undersized softener or filter can all cause a pressure drop that looks like a tank problem. Most well companies look only at the tank, and most plumbers stop at the pipes. We check both. If the issue turns out to be treatment equipment, see our whole-house filtration and water softener pages, or book a free in-home water test.

 Pressure tank and pressure switch replacement cost 

Most pressure switch replacements are a quick, low-cost repair. A full pressure tank replacement costs more, depending on tank size, whether it's an easy swap or a relocation, and how much of the tank tee and piping needs updating. We give you the price before we start work, with no surprise add-ons. Call 410-739-2919 for a quote.

 Well pressure tank and switch service across the Eastern Shore 

From our base in Queenstown, we serve well owners throughout:

  • Queen Anne's County: Queenstown, Grasonville, Kent Island, Stevensville, Chester, Centreville, Church Hill, Sudlersville
  • Talbot County: Easton, St. Michaels, Oxford, Trappe, Cordova, Wye Mills
  • Kent County: Chestertown, Rock Hall, Galena
  • Caroline County: Denton, Ridgely, Greensboro, Preston
  • Dorchester County: Cambridge and surrounding areas

 Why Eastern Shore homeowners call Lifewell 

  • Master Plumber–led. Your job is overseen by a licensed Maryland Master Plumber, not a subcontractor.
  • Truly local. Eastern Shore natives based in Queenstown, not a call center or a Western Shore company that treats the Shore as the edge of its map.
  • Honest diagnosis. If your tank just needs air, we'll say so. Education over sales, just like our water treatment work.
  • We see the whole system. Tank, switch, plumbing, and treatment equipment, all checked on one visit.
  • Licensed and insured.

 Frequently Asked Questions 

How long does a well pressure tank last?

A quality bladder or diaphragm tank typically lasts around 10 to 15 years, though Eastern Shore conditions like humidity, iron, and sediment can shorten that. Pressure switches often need replacing sooner than the tank, which is why we usually replace the switch whenever we replace a tank.

Why does my well pump keep turning on and off?

Rapid on-off cycling (short cycling) is most often caused by a waterlogged tank, a tank that has lost its air pre-charge, a failed bladder, or a clogged or failing pressure switch. Less often it's a leaking check valve or a leak in the plumbing. Short cycling wears out pumps quickly, so it's worth a call soon.

Can I just add air to my pressure tank?

Sometimes. If the bladder is intact and the tank simply lost its air charge, resetting the pre-charge with the system drained can fix it. If water comes out of the air valve, the bladder has failed and the tank needs replacement. We check this first on every call.

How long does a pressure tank replacement take?

Most straightforward swaps take a few hours, and your water is off only for part of that time. Relocating a tank or updating old piping can take longer. We'll tell you what to expect before we start.

What pressure should my well system be set to?

Most homes on the Shore run a 30/50 or 40/60 PSI switch setting. The tank's air pre-charge should be set 2 PSI below the cut-in pressure, for example 28 PSI for a 30/50 switch or 38 PSI for a 40/60 switch.

Could my water softener or filter be causing low pressure?

Yes. A clogged sediment filter or undersized treatment equipment can cause a noticeable pressure drop. Because we install and service water treatment systems too, we check for this on every pressure call.

Do you only work on systems you installed?

No. We service and replace pressure tanks and pressure switches on existing well systems of any brand.

 Get your water pressure back!

Call Lifewell Water Solutions at 410-739-2919 or contact us online.

Request a Well Pressure Tank Estimate