Well pressure tank replacement

The pressure tank stores water under pressure so your pump doesn’t have to start every time you open a faucet. When it fails, the pump starts and stops constantly (“short cycling”), which can wear out an otherwise healthy pump.

Signs of a failing tank

• The pump clicks on and off every few seconds while water runs.
• Pressure surges and drops at the faucet.
• The tank sounds or feels full of water all the way up (waterlogged).

Why it matters

Most modern tanks use a bladder or diaphragm and last about 10–15 years. When the bladder fails, the tank waterlogs and the pump short cycles. Every start sends a surge of current through the motor. The Well Guide says a pump that would normally last 12–15 years can fail within 1–3 years under sustained short cycling (The Well Guide).

Typical scope and cost

A standard job swaps the tank and usually the pressure switch and gauge, sets the tank’s air charge, and checks the system. Published figures: most homeowners pay $400–2,300, with most standard jobs between $600–1,500 all-in. The tank itself is about $150–900 depending on size (The Well Guide).

If your pump and tank are about the same age, ask whether replacing both at once makes sense. It can save a second service call (The Well Guide).

Who can do it

NH law limits well and pump repair work to licensed water well contractors, pump installers, plumbers or electricians (RSA 482-B:15). Check a license on the NHDES lookup.