Kohler GP1078440 vs American Standard Universal Flapper

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 American Standard 7381129-200.0070A is a universal replacement flapper assembly designed specifically for 2-inch American Standard flush valves. It provides a comprehensive repair solution by including the flapper, chain, hook, float, and clips in a single package. However, the lack of consumer reviews and detailed material specifications makes it difficult to fully assess its long-term reliability compared to competitors.