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How to Stop a Running Toilet

A running toilet not only wastes water but can also lead to higher bills and unnecessary wear on your plumbing system. Fortunately, many common flush problems can be resolved with a few simple adjustments or replacements. In this guide, we’ll walk you through the steps to troubleshoot and fix these issues, helping you save water and maintain your toilet’s functionality.

Tools Required:

  • Adjustable wrench
  • Screwdriver
  • Replacement flapper (if necessary)


  1. Check the Fill Tube
  2. Adjust the Fill Height by Checking the Float
  3. Adjust the Flush Handle/Flapper Chain
  4. Replace the Flapper

Project Step-by-Step:

Step 1: Check the Fill Tube

  • Start by locating the fill tube, which is a small flexible tube that runs from the fill valve to the overflow pipe.
  • Ensure that the fill tube is properly attached to both the fill valve and the overflow pipe.
  • Check for any kinks, twists, or obstructions in the fill tube that may be affecting the flow of water.
  • If you find any issues, adjust the fill tube as needed to ensure proper water flow.

Step 2: Adjust the Fill Height by Checking the Float

  • Lift the lid off the toilet tank and locate the float, which is usually a ball or cup attached to the fill valve.
  • Check the water level in the tank and adjust the float to set the desired fill height. This can usually be done by bending the float arm or adjusting a screw on the fill valve.
  • Make sure the water level is about an inch below the top of the overflow pipe to prevent overflow.

Step 3: Adjust the Flush Handle/Flapper Chain

  • If the toilet continues to run after flushing, the problem may be with the flush handle or flapper chain.
  • Check the flush handle to ensure it’s properly connected to the flush lever. If loose, tighten the nut securing the handle.
  • Inspect the flapper chain to ensure it has enough slack to allow the flapper to close fully when the toilet is not in use. Adjust the chain length if necessary.

Step 4: Replace the Flapper Running Toilet

  • If the flapper is worn or damaged, it may not seal properly, causing water to leak into the bowl and the toilet to run constantly.
  • Turn off the water supply to the toilet and flush to drain the tank.
  • Remove the old flapper by unhooking it from the flush valve and replace it with a new one.
  • Follow the manufacturer’s instructions for installing the new flapper and adjust the chain length as needed.

By following these steps, you can troubleshoot and fix common flush problems in your toilet, saving water and avoiding the need for professional assistance. If you encounter more serious issues such as a bathtub leak repair, it may be time to call in an expert like EcoFix Plumber for assistance with leak repair and other plumbing problems.

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