Toilet Keeps Running: Simple Fixes vs When It’s Something Else
March 9, 2026

Quick Answer

Most running toilets are caused by a worn flapper, a fill valve issue, or an overflow tube problem. Replacing the flapper or fill valve often solves it quickly.

Quick checks

  • If water trickles into the bowl, flapper is likely leaking
  • If tank overfills, the float or fill valve needs adjustment
  • If toilet “ghost flushes,” you are losing water from the tank

Fix vs replace

  • Replace flapper if warped or brittle
  • Replace fill valve if it sticks or fails to shut off
  • Replace supply line if it looks corroded or damaged

FAQ

  • How much water does a running toilet waste?

    Often a lot, especially over weeks.


  • Is it worth repairing?

    Usually yes, unless the toilet is very old.

  • Can I ignore it?

     It often gets worse and increases water bills.

CG Plumbing can fix it quickly, and verify there are no hidden issues causing repeated problems

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