Toilet Keeps Running? Common Causes and What to Do

A running toilet is one of the most common plumbing problems and it can waste a surprising amount of water. In many cases, the issue is inside the tank and can be fixed by replacing worn parts or adjusting the fill mechanism.

What Homeowners Usually Notice

  • You hear water refilling the tank randomly
  • The toilet “runs” after flushing and doesn’t stop
  • You have to jiggle the handle to get it to stop
  • The water level in the tank seems too high or inconsistent

Safe Things You Can Check

  • Remove the tank lid and see if the flapper is sealing properly
  • Check the chain length (too tight or too loose can cause sealing issues)
  • Verify the float is set so the water stops below the overflow tube
  • Look for water trickling into the bowl (a sign the flapper isn’t sealing)

When It’s Time to Call a Professional

  • The toilet keeps running after basic adjustments
  • You see leaking at the base or around the supply line
  • Parts are corroded or difficult to remove
  • You want the repair done quickly without trial and error

How This Is Usually Fixed

  • Replacing the flapper (most common cause)
  • Replacing the fill valve if it won’t shut off properly
  • Adjusting the float level to prevent overflow tube refilling
  • Replacing worn tank components as a set for long-term reliability

Local Plumbing Help

A running toilet is usually a straightforward repair, but it’s best to address it quickly to reduce water waste and prevent the issue from turning into a bigger leak or hardware failure.

A toilet that won’t stop running is one of the most common plumbing calls we see in Barrington homes. While some fixes are simple, ongoing running usually means worn internal parts. Our plumbing repair services help Barrington homeowners stop water waste and prevent bigger issues.

Need a hand with this?

If you’d rather have a pro take care of it, TPM Home Repair can help. Reach out for a quote or to request service.

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FAQs

Why won’t my toilet stop running?

Worn flappers, faulty fill valves, or chain issues are common causes.

Is a running toilet wasting a lot of water?

Yes. A running toilet can waste hundreds of gallons per day.

When should a running toilet be repaired?

As soon as possible to prevent water waste and higher utility bills.