Fluidmaster 500 Flapper
Score: 75/100
Kohler GP85160
Score: 85/100Rankings

The Kohler GP85160 is a genuine 2-inch blue toilet flapper featuring an integrated adjustable float, designed specifically for 1.6 GPF two-piece Kohler toilets. It offers a tight seal to prevent leaks and includes durable, chlorine-resistant vinyl construction for long-lasting performance. The product comes with a 5-year warranty and is intended as a direct replacement for failing flappers in compatible models.
The Fluidmaster 500 is a universal 2-inch solid frame flapper designed for older 3.5+ GPF toilets, featuring Microban technology for durability. Its main limitation is the lack of adjustability and limited consumer feedback for long-term reliability. It is best suited for homeowners with standard 2-inch valves on older toilets needing a reliable, no-frills replacement.
| Attribute | Fluidmaster 500 Flapper | ![]() |
|---|---|---|
2 inchesbest | 2 inchesbest | |
1 countbest | 1 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | Fluidmaster 500 Flapper | ![]() |
|---|---|---|
Material & Durability(5) | ||
Material | Vinyl | Plastic/Vinyl |
Seal Type | Solid Frame | Tight seal |
Chlorine Resistance | Unknown | true |
Hard Water Resistance | Unknown | null |
Water Resistance | Unknown | null |
Design & Features(4) | ||
Chain Material | Metal | null |
Chain Adjustability | false | true |
Installation Type | Standard | Direct replacement |
Flapper Type | Solid Frame | Flapper with Float |
Packaging & Support(2) | ||
Warranty Period | 1 year | 5 years |
Certifications | Unknown | None |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | 2 inches | Bottom outlet |
Universal Fit | true | false |
Toilet Type Compatibility | Pre-1994 (3.5+ GPF) | Two-piece |
GPF Compatibility | 3.5+ GPF | 1.6 |
Flush Valve Size | 2 inches | 2 |

Products in the top-left offer the best value (high score, low price).
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Retailers and product pages from major home improvement stores describe the Kohler GP85160 as a reliable and efficient solution for toilet maintenance. Reviewers highlight its high-quality materials and precise water level control capabilities, noting it as an ideal choice for homeowners seeking hassle-free performance.
Everyday users generally praise the product for its ease of installation and effectiveness in preventing leaks. Common themes include satisfaction with the adjustable float feature for customizing water levels and the durability of the vinyl material.
