The pressure tank stores water under air pressure so the pump does not have to start every time a faucet opens. When the tank stops doing that job, the most common signs are a pump that clicks on and off every few seconds, pressure at the faucet that surges and drops, and a pressure gauge needle that swings quickly. Left alone, that rapid cycling wears out the pump motor and pressure switch much faster than normal use.
Likely causes include a ruptured bladder or diaphragm inside the tank (the tank becomes “waterlogged”), an air pre-charge that has leaked down over time, a pressure switch that is failing or set wrong, or a corroded tank. A provider typically checks the tank’s air pre-charge with the pump off and the tank drained, inspects the air valve, tests the pressure switch cut-in and cut-out, and watches a full pump cycle.
Repair versus replacement depends on tank age, visible rust, and how well the system holds pressure after testing. Most modern bladder tanks are replaced as a unit when the bladder fails; a pre-charge adjustment or pressure switch replacement is a much smaller job. The provider will review findings and outline options so the homeowner can decide based on long-term reliability rather than temporary fixes.
Pressure tank or well pump? How to tell
Signs it is the tank
- •Pump starts and stops every few seconds while a faucet runs
- •Pressure at the faucet surges and fades
- •Gauge needle jumps quickly between low and high
- •Water, not air, comes out when the air valve on the tank is pressed
- •The tank sounds or feels full of water all the way to the top
More warning signs: 7 signs your well pump or pressure tank may be failing
Signs it is the pump or well
- •Pressure never builds, or builds very slowly
- •No water at all
- •Pump runs for long stretches without shutting off
- •Sand, sediment or air in the water
- •Breaker trips when the pump starts
Start here: emergency no-water help or well pump repair
In Kittitas County, a pressure tank and switch in an unheated well house or pump house need protection from freezing. A frozen switch or the small tube that feeds it is a common reason for no water on very cold mornings, and a tank that freezes solid can split. If you cannot tell which part is at fault, well system diagnostics checks the tank, switch and pump together.
What pressure tank service typically covers
✓Bladder Replacement
Restores proper water and air separation inside the tank to eliminate short cycling and regain steady pressure.
✓Pressure Switch Calibration
Adjusts the switch settings so the pump starts and stops at correct pressure levels for consistent household flow.
✓Tank Air Charge Check
Measures and corrects the pre-charge air pressure to prevent pump short cycling and extend tank life.
✓Corrosion Assessment
Identifies rust or weak spots on the tank exterior that may require replacement to avoid leaks.
How it works
- 1
Describe the Symptoms
Note the exact water pressure changes, cycling frequency, and any recent weather or usage patterns.
- 2
Review the Well System
Walk through visible components like the pressure gauge, tank, and piping to gather basic observations.
- 3
Provider Evaluates the Cause
A local technician tests pressure, switch function, and tank condition to pinpoint the problem.
- 4
Discuss Repair or Replacement Options
Review findings and compare costs and benefits so you can choose the best next step.
What affects the cost
Resetting the air pre-charge or replacing a pressure switch is a small job. Replacing a tank depends on its size, whether it sits in the house, a basement or a pump house, and any plumbing changes needed to fit a new one. If the pump has been short-cycling for a long time, the provider may also check the pump and switch for wear. See typical well repair costs in Central Washington.