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Kohler K-GP1039444 Class 5 Toilet Flapper for One Piece Toilet

Bright red rubber flapper with stainless chain.
Kohler K-GP1039444 Class 5 Toilet Flapper for One Piece Toilet - Image 2
Kohler K-GP1039444 Class 5 Toilet Flapper for One Piece Toilet - Image 3

chat iconWHAT OUR CUSTOMERS SAY…

“They had my part shipped the same day. I mistakenly checked that I would pick the part up at the store and they fixed it in minutes. ”
-Michael F.
01/04/2026

$22.17

 

The Kohler GP1039444 is a genuine Kohler 3-1/4 inch toilet flapper for specific Kohler one-piece toilets with Class Five flushing technology, designed to provide a reliable seal and prevent water loss.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, asknoel@noelsplumbingsupply.com, or via the text widget on this screen.

SKU: 91039444 Category: Tag:

Restore your toilet’s original flushing power with the Genuine KOHLER GP1039444 3-1/4″ Toilet Flapper Assembly. Engineered specifically for Kohler one-piece toilets utilizing Class Five® flushing technology, this authentic OEM replacement part resolves phantom flushes, constantly running water, and slow tank-to-bowl leaks.

 

GP10394444

 

  • The flapper is a crucial part of the toilet’s flushing system, controlling the flow of water from the tank to the bowl and creating a tight seal when not in use.
  • This part is not universal and is made specifically for certain Kohler one-piece toilet models.
  • Kohler GENUINE Part
  • For One-Piece toilets with 3 1/4″ flappers
  • Compatible with the following Kohler models: Cimarron® 3489, 3802, 11889, Memoirs® 3451, 3453

 

Related Documents

 

K-3489 Cimarron Toilet Parts Breakdown

 

K-3451 Memoirs Toilet 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…

“Outstanding fast delivery on two pieces of an ancient Wolverine bath stem for Kohler - from the early 40s I think. The new one has a different body design, but it screwed directly into the old hot/cold tree and was the exact 6" length. Forty eight hours after installation now, and all remains fine. Also, kudos to the people who set up the website and ordering process. Great work - clear photos and info ! PS: I'm not an employee or family...lol. I retired from electrical wholesaling here outside Chicago and I appreciate a good job. ”
-JM C.
07/31/2026
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