How To Change A Flapper In A Toilet

If you’re experiencing a running toilet or water constantly trickling into the bowl, it might be time to change the flapper. A flapper is a rubber valve that controls the flow of water from the tank to the bowl. Over time, flappers can become worn or damaged, causing leaks and wasting water. In this article, we’ll walk you through the steps of how to change a flapper in a toilet.

Gather Your Tools

Before you begin, you’ll need a few tools. Here’s what you’ll need to change a flapper in a toilet:

  • A replacement flapper
  • A wrench
  • A towel or rag
  • A bucket

Turn Off the Water

The first step in changing a flapper is to turn off the water supply to the toilet. Look for the shut-off valve behind the toilet and turn it clockwise until the water stops flowing. Then, flush the toilet to drain the tank.

Remove the Old Flapper

Once the tank is empty, you can begin removing the old flapper. Start by disconnecting the chain from the flush lever. Then, remove the flapper from the mounting ears on the overflow tube. Be gentle, as the flapper may be stuck in place.

Install the New Flapper

Now that the old flapper is removed, you can install the new one. Start by attaching the flapper to the mounting ears on the overflow tube. Then, connect the chain to the flush lever. Make sure there is enough slack in the chain for the flapper to close completely.

Turn on the Water

With the new flapper installed, you can turn the water supply back on. Turn the shut-off valve counterclockwise until the water starts flowing. Then, let the tank fill up with water.

Test the Flapper

Once the tank is full, it’s time to test the flapper. Flush the toilet and make sure the flapper closes completely. Check for leaks around the base of the toilet and the water supply line. If everything looks good, you’re all set!

FAQs About How to Change a Flapper in a Toilet

Q: How do I know if I need to change the flapper?

A: If your toilet is running constantly or you hear water trickling into the bowl, it’s likely that the flapper is worn or damaged and needs to be replaced.

Q: Can I use any flapper to replace my old one?

A: No, it’s important to use the correct size and type of flapper for your toilet. Check the packaging or consult a professional to ensure you’re using the right flapper.

Q: Can I change the flapper myself?

A: Yes, changing a flapper is a simple DIY project that almost anyone can do with the right tools and a little bit of know-how.


Changing a flapper in a toilet is a quick and easy fix that can save you money on your water bill and prevent damage to your toilet. By following these steps and using the right tools, you can replace a worn or damaged flapper in no time. Remember to turn off the water supply before you begin and test the flapper after installation to ensure it’s working properly.