Toilet Running With No Visible Leak

Tools That May Help

Before calling a professional, these common tools may help you check the issue safely.

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Problem

Your toilet runs but no leak is visible.

Common Symptoms

  • Water leaks or moisture
  • Unusual plumbing odors
  • Slow drainage
  • Visible water stains

Possible Causes

  • Hidden leak
  • Worn flapper
  • Internal seal issue

How To Fix It

  • Check flapper
  • Use dye test
  • Inspect tank

Safety Tip

Dry surrounding areas completely after repairs to help prevent water damage or mold growth.

When To Call A Professional

If running continues without visible leak

Related Problems

Still troubleshooting? These similar problems may help you narrow it down.

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