Kohler K-1138648 Toilet Flapper
WHAT OUR CUSTOMERS SAY…
“Recently I purchased a rebuild kit for my American Standard R series bathtub faucet. I want to say thank you for carrying this product. The rebuild kit worked beautifully and I was able to save the original look and feel of our 1957 bathroom. Thank you! ”
-Adam T
04/11/2024
$15.27
The Kohler K-1138648 is a genuine replacement flapper assembly for various Kohler toilets, including the San Raphael K-3722 model. It is a critical component for controlling water flow in the flushing system.
We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, noelsplumbingsupply@fuse.net, or via the text widget on this screen.
Kohler Toilet FlapperÂ
K-1138648
- Kohler GENUINE Part
- Replacement flapper with float kit for various Kohler toilets
- For San Raphael K-3722
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Common questions about this product
Is this item the original manufacturer's recommended replacement part?
Yes, this is the OEM recommended part.
Is this the correct item for my application?
If you’re not sure text us a picture 1-888-275-6635 or email us a picture at noelsplumbingsupply@fuse.net.
We will make sure you have the right part.
WHAT OUR CUSTOMERS SAY…
“Really great experience getting parts for my 30-year old frost free silcocks. They not only had the parts available, but they were shipped within a couple of hours. Great job, thank you! ”
-Phil R
02/08/2026