Kohler K-1138648 Toilet Flapper
WHAT OUR CUSTOMERS SAY…
“Stop in Noel's , the counter man was very friendly, knowledgeable, and handled me the part I needed with in 2 minutes. I also got some professional advice.
I will buy all of my plumbing needs here in the future. We home owners need business like this . ”
-Eric O.
02/29/2020
$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…
“I texted him a picture of the shower part from the 50’s I needed and he was able to identify it immediately. I ordered it and it showed up in two days! Very knowledgeable and friendly! ”
-Jim F.
02/04/2026