Kohler GP1078441
Score: 85/100
iFealClear Toilet Flapper
Score: 72/100Rankings
The Kohler GP1078441 is a genuine OEM replacement flapper designed specifically for Kohler two-piece toilets featuring Class Five flushing technology. Its key strength is the precise 3.25-inch rubber seal that effectively prevents phantom flushes and maintains high-efficiency performance. However, it is incompatible with non-Kohler models and may degrade faster in hard water environments.
The iFealClear 3-inch Toilet Flapper is a high-efficiency, water-saving rubber replacement part designed specifically for Gerber 99-788 flush valves in high-efficiency toilets. It features a 3-inch diameter with a single large hole in the cone, blue coloring for visibility, and an adjustable chain with dot markers for easy installation without tools. Ideal for DIY residential bathroom repairs, water conservation upgrades, and quick replacements requiring an exact OEM fit.
| Attribute | | |
|---|---|---|
3.25 inchesbest | 3 inches | |
1 countbest | 1 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Material & Durability(1) | ||
Seal Type | Rubber | Standard |
Design & Features(3) | ||
Chain Material | Standard | Nylon/Plastic |
Chain Adjustability | false | true |
Installation Type | Direct Replacement | Tool-free |
Packaging & Support(1) | ||
Warranty Period | 1 Year Limited | None |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | Kohler Class Five | Gerber 99-788 |
Flapper Diameter (inches) | 3.25 inches | 3 inches |
Toilet Type Compatibility | Two-Piece | High-Efficiency Toilets (HET) |
GPF Compatibility | 1.28 | Water Saving |
Flush Valve Size | 3.25 inch | 3 inch |
Products in the top-left offer the best value (high score, low price).
Plumbing experts and editors from sites like Ferguson and CPE Supply highly recommend this part as the definitive OEM replacement for Class Five systems. They highlight its precise 3.25-inch seal as critical for preventing phantom flushes and its durable rubber construction for resisting corrosion.
Everyday consumers generally report high satisfaction, with many noting that the flapper perfectly fits their Kohler models and restores the toilet to like-new flushing performance. Common praise includes the ease of installation and the elimination of running toilet noises.
“Perfect fit for my Kohler Cimarron-flush like new!”
“No more running toilet; lasted 2 years in hard water”
“Installed in 2 minutes, chain included.”
Parts suppliers and video tutorials emphasize its exact compatibility with Gerber 99-788 valves, ease of tool-free installation, and water-saving benefits for high-efficiency toilets. It is highlighted as a genuine equivalent replacement without variances.
Users commonly praise the product as a quick fix for running toilets with a reliable seal and easy chain adjustment. Recurring complaints are not prominently noted, though phantom flushes are mentioned as a pre-replacement issue.
