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

A running toilet most often points to a worn or misaligned flapper that can’t seal the flush valve, so water keeps leaking into the bowl. Our plumbers also check the fill valve for sticking or overfilling. Every visit starts with a full inspection to confirm the cause, and we provide same-day and 24/7 emergency service in Chicagoland. Technicians are licensed and background-checked, with upfront pricing and code‑compliant fixture replacements when needed.

Quick checks you can try:

• Drop food coloring in the tank; color in the bowl = flapper leak.
• Make sure the chain isn’t too tight.
• Verify float level isn’t set too high.

<br/> Updated: 2025-12-26 00:00:00 <br/>

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