
Korky 54BP
Score: 75/100
Kohler GP1078440
Score: 80/100Rankings

The Kohler GP1078440 is a genuine 2-inch shark-fin style toilet flapper designed as a replacement part for select Kohler one-piece toilets. It features a corrosion-resistant rubber construction with a red finish and includes an adjustable chain for secure sealing and efficient flushing. This part is specifically engineered for bottom outlet flush valves to ensure a reliable fit.

The Korky 54BP is a basic, universal 2-inch toilet tank flapper made of flexible, corrosion-resistant rubber, designed for standard plastic and brass flush valves. It offers a reliable seal and easy installation but lacks the premium durability and extended warranty of higher-tier Korky models. It is best suited for homeowners needing a cost-effective, quick replacement for standard gravity-fed toilets.
| Attribute | ![]() | ![]() |
|---|---|---|
2 inchesbest | 2 inchesbest | |
1 countbest | 1 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Material & Durability(1) | ||
Material | Flexible Rubber | Rubber |
Design & Features(3) | ||
Chain Material | Stainless Steel | Not specified |
Installation Type | Standard | Direct replacement |
Flapper Type | Standard | Shark-fin |
Packaging & Support(1) | ||
Warranty Period | 1 year | null |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | 2 inch Plastic/Brass | Bottom outlet |
Universal Fit | true | false |
Toilet Type Compatibility | Gravity-fed | One-piece |
GPF Compatibility | 1.28-5 | null |
Flush Valve Size | 2 inch | 2 |


Products in the top-left offer the best value (high score, low price).

No independent professional reviews or editorials were found in the research data. Manufacturer and retailer descriptions position the product as the original toilet flapper and the choice of plumbing professionals since 1954, highlighting its universal fit, flexible rubber seal, and reliability for standard toilets.
Results contain no consumer reviews, testimonials, or forum discussions. Consequently, common themes, praise, or complaints from everyday users cannot be derived from the available data.
