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




















