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Troubleshooting Common Toilet Problems

By Bob Formisano, About.com

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Problem: Toilet Runs Constantly


Problem: Toilet Runs Constantly

Possible Solutions:

  • Lift chain is disconnected from handle lever or is kinked preventing the flush ball or flap from properly seating
  • Lift wire is kinked or binding
  • Float ball is rubbing on side of tank
  • Plunger or diaphragm type ballcock is not shutting off completely. Bend float arm to push float ball more into water.
  • Water level in tank is too high and water is running into overflow pipe. Adjust water level in tank.
  • Flush valve not sealing. Inspect tank ball or flapper ball and replace if worn or soft. See Repairing a Leaky Toilet Tank Flush Valve
  • Make sure tank ball lift wire is straight and that tank ball is dropping onto the center of the flush valve opening.
  • Replace leaky float ball.
  • Replace faulty ballcock.

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