What is the most common cause of a running toilet leak?

Most running toilets start with a flapper that no longer seals or a chain that is too tight. We typically check the flapper, the fill valve, and the tank water level first. If the flapper is worn or the fill valve keeps refilling, the toilet will run and waste water. We serve Englewood and Clifton and will confirm the exact fix and pricing after an on-site inspection.

Quick checks:

• Jiggle the handle to free a tangled chain.
• Inspect the flapper for warping or cracks.
• Watch the tank waterline; rising water suggests a fill valve issue.

<br/> Updated: 2026-01-02 <br/>

Need help in Englewood, NJ? Call (908) 274-0866 or book online.

"Toilet control value repair did excellent job and very professional" — Rich C.