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Kohler K-1138648 Toilet Flapper

Black plastic arm with red rubber seal and braided chain.
Kohler K-1138648 Toilet Flapper - Image 2

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“Hi, I just wanted to write back and tell you how much I appreciate the quick response and service. I'm old, and good customer service used to be the norm. Not anymore, so when a company gives GREAT customer service, I like to thank them for it. I really appreciate you taking the time to answer my question, and also the fast shipping on my part. Have a great day! ...Steve ”
-Steve
09/27/2024

$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.

SKU: 54648 Category: Tag:

Kohler Toilet Flapper 

 

K-1138648

 

  • Kohler GENUINE Part
  • Replacement flapper with float kit for various Kohler toilets
  • For San Raphael K-3722

 

Related document

 

San Raphael K-3722 Parts Breakdown

Common questions about this product

Is this item the original manufacturer's recommended replacement part? chevron-icon

Yes, this is the OEM recommended part.

Is this the correct item for my application? chevron-icon

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.

 

 

chat iconWHAT OUR CUSTOMERS SAY…

“The vacuum breaker on my outdoor spigot failed and Noel's Plumbing was the only placeI could find that had the appropriate mfr. part. I sent a text with photos on Wednesday evening to make sure the part I found was correct. In less than 2 hours later, I had a reply confirming it was the correct part. Placed my order that evening and received the part on Saturday afternoon (about 2.75 days) and my plumbing issue was resolved! I highly recommend - I really appreciated the prompt and pleasant response. ”
-Kimberly S.
04/25/2026
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