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

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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

WHAT OUR CUSTOMERS SAY…

“This place is amazing. I live in San Antonio, Texas and there are a few plumbing stores with vintage parts but they never have what I need and the ordering process takes them weeks. I found a rare part at Noels by reverse image search but they will do it for you. I've used them 3 times. Their agents are knowledgable and polite. They will find you the same part or the after market part and get you going on your way. They have 2-3 day shipping. My house was built in the 30's and they know exactly what the after market parts are that I need. I save money and time going to them. I sure wish they were in San Antonio! I will just go directly to Noel's next time - they are LEGENDS! ”

-BP W.

06/21/2026

$20.17

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, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

SKU: 91039444 Category: Toilet Flappers Tag: Kohler

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Kohler Class 5 Toilet Flapper for One Piece Toilet

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

GP10394444

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K-3451 Memoirs Toilet Parts Breakdown

Common questions about this product

Yes, this is the OEM recommended part.

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…

“It is so nice to see you guys are still rocking and providing the best service for unique plumbing parts. I first used you guys 20 plus years ago when my brother turned me on to you. I live in Nashville now and was searching the entire region for a particular cartridge and you are the only one that had it. Hands down there's not many like you and you've always provided a great service and I'm glad to see you doing it now even online! ”

-James

01/11/2022