KOHLER GP1078440 Shark-Fin Toilet Flapper
- 2 in shark-fin flapper (2.1 in center to center)
- Not universal: specific one-piece Kohler models
- Memoirs, Gabrielle, Santa Rosa, Kathryn and more
- Corrosion resistant rubber
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A genuine Kohler shark-fin flapper for a set list of one-piece toilets. It will not fit other brands or models, so confirm your toilet model first.
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ASIN: B001GZUMTCModel: GP1078440Category: Toilet Flappers
Overview
Inside a one-piece Kohler toilet with a running tank, this genuine shark-fin flapper replaces the worn seal over the flush valve. It fits only the listed models, measured center to center where the arms attach.
A factory part restores the original seal and flush performance on matching models. The compatibility list is precise. Other toilets need a different flapper.
Who it's for
Kohler owners matching a listed model number suit it. Two-piece or non-Kohler toilets need another part.
Pros and cons
- Genuine Kohler part
- Clear compatibility list
- Measurement guidance provided
- Not a universal fit
- Chain not listed as included
Performance notes
The flapper seals by sitting flat on the flush valve, so an exact size and shape match stops leaks. Corrosion resistance helps it last in treated water. Chain length must be set after install.
Specifications
| Brand | Kohler |
|---|---|
| Model | GP1078440 |
| Dimensions & fit | |
| Size | 2 in (2.1 in center to center) |
| Item weight | 1.8 ounces |
| Construction & materials | |
| Material Type | Rubber |
| Color | Red |
| Compatibility & installation | |
| Compatible models | Memoirs 3451, 3453; Gabrielle 3322; Santa Rosa 3323; Kathryn 3324; San Raphael 3384; Devonshire 3488; Revival 3360; Ankara 14230-TF; Rialto 3386 |
| Included components | |
| Included Components | Toilet flapper |
| Unit Count | 1 Count |
| Other details | |
| Shape | Shark-fin |
Frequently asked questions
Is the Kohler GP1078440 a universal flapper?
No. It fits only specific Kohler models listed, such as Memoirs 3451 and Gabrielle 3322.
How do I measure for the Kohler GP1078440?
Measure center to center inside the flapper where the arms attach to the flush valve. This part measures 2.1 inches, making it a 2-inch flapper.
Does it fit two-piece toilets?
It is listed for various one-piece toilets.
Is a chain included?
Only the toilet flapper is listed.