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

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“Do you need a vintage plumbing part and nobody seems to be able to find it in your area? Save yourself time and hassle and go to Noel's Plumbing website. You can text them a photo of the part and they will find it in minutes and give you the link to order it, all at a competitive price. My plumbers seem incapable of doing this and hand the job off to me. What can you do? But Noel's always has the 1930s parts I need or the aftermarket part that will get the job done. If I need it fast I can get it in 2-3 days from them and they know exactly what they are doing. It's a good old-fashioned plumbing store with all the parts you could possibly need and people who know how to get them. The service is top level. The staff pick up the phone after one or two rings. They are polite and KNOWLEDGABLE. I'm so tired of dealing with folks who can't find a chicken in a hen house. LOL. ”
-Bry W.
06/23/2026

$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.

 

 

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-William S.
02/23/2026