How to Fix a Toilet Flushing Twice

Does your toilet flush twice with only one press of the toilet handle? With a simple adjustment of your toilet flapper, this is quickly resolved. 

If your toilet flushes twice, it is likely because the flapper stays open too long and flushes too much water. If your flapper is adjustable, you can correct this by adjusting your flapper to close faster. If you do not have an adjustable flapper, your toilet may have the incorrect flapper installed. 

Make sure the flapper chain has only one to two chain links in slack from the flush lever. The flapper may not perform correctly if the chain has excess slack or is too tight.

To address a double flush toilet issue effectively, consider replacing or adjusting the flapper for optimal water use and flushing efficiency.

Does this describe your toilet issue?

Step 1: Troubleshoot the Issue

Incorrect Flapper: Your toilet model may require a standard 2-inch, large 3-inch, or adjustable flapper. Confirm you do not have the wrong flapper installed.

Improperly Installed Flapper: If you have the correct flapper installed and it is adjustable, you may need to tweak the settings to get the flapper to close faster or slower.

Flapper Chain Misalignment: If the flapper chain has too much slack or is too tight, it can cause it to remain open for too long. We recommend only having 1-2 chain links in slack.

How to Fix/Replace

  1. Shut Off the Water Supply: To start, turn off the water supply to your toilet. Look for the water shut-off valve on the wall or floor near the toilet's base. Turn it clockwise to shut off the water flow.
  2. Flush and Remove the Old Flapper: Flush the toilet with the water supply off to drain any excess water from the tank. Next, carefully remove the old flapper from the flush valve, usually connected by tabs or ears.
  3. Install the Korky Flapper: If you have a Korky flapper, align the flapper ears with the tabs of the flush valve and attach it securely. Please note that installation may vary depending on your Korky flapper model.
  4. Adjust the Flapper Chain: Attach the flapper chain to the flush lever, ensuring it goes as straight up and down as possible. Ensure there are only 1-2 chain links in slack, otherwise, the flapper will not perform correctly.
  5. Turn On the Water Supply: Turn the water supply back on by rotating the shut-off valve counterclockwise. Allow the tank to fill up and perform a test flush to ensure everything works as expected.
Does your toilet flush twice?