What is causing the chain in my toilet tank to catch?

| by Will Wang
What is causing the chain in my toilet tank to catch?

One of the most common problems with a toilet is the chain catching under the toilet flapper. As a result, the water continually leaks out of the tank, and therefore the tank continually attempts to fill. When tank lever arm is sitting at a 45º angle the length of the chain is longer than for tanks with a higher lever arm. As a result of the low sitting lever arm the chain is loose and able to get caught under the flapper when it closes during a flush. Water conditions can cause tackiness on the chain and flapper resulting in the chain sticking to the flapper or getting caught on itself. Below are the typical problems with the chain catching and the recommended solutions:

  • Chain catching on tank lever arm:
    1. Remove some of the excess chain you will not need. Leave three to six links of excess.
    2. Cut a thin plastic tubing, (similar to drinking straw) 2/3rds the length of the chain and then pull the chain through the tube and reattach chain to lever arm.
  • Chain catching on or under flapper:
    1. ​​Cut a thin plastic tubing, (similar to drinking straw) 2/3rds the length of the chain and then pull the chain through the tube and reattach chain to lever arm.
    2. Replace flapper chain with Fluidmaster’s Universal Flapper Chain #5104.
  • The tank lever is not dropping down after it has been pressed and released:
    1. ​Replace lever arm.

Check out more toilet repair tips here

About Fluidmaster: Fluidmaster provides many solutions to everyday toilet problems, helping you to maintain your toilet and plumbing systems. With water conservation becoming an increasingly important issue for the majority of Americans, making water–conscious decisions is more prevalent than ever. Visit the Fluidmaster website for more information.


Topics: Bathroom, Plumbing & Fixtures, Water Saving Devices

Companies: Fluidmaster


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