Kohler GP1078440
Score: 80/100Fluidmaster 506 Flapper
Score: 70/100Rankings
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 Fluidmaster 506 is a universal, non-adjustable 2-inch flexible frame flapper designed for older pre-1994 toilets with 3.5+ GPF flush valves. Its main trade-off is the lack of adjustability and modern durability features, making it less suitable for water conservation. It is best suited for DIY users replacing flappers on older, high-volume toilets with irregular valves.
| Attribute | | Fluidmaster 506 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 506 Flapper |
|---|---|---|
Material & Durability(4) | ||
Seal Type | Shark-fin | Flexible |
Chlorine Resistance | true | Unknown |
Hard Water Resistance | null | Unknown |
Water Resistance | null | Unknown |
Design & Features(4) | ||
Chain Material | Not specified | Unknown |
Chain Adjustability | true | false |
Installation Type | Direct replacement | Standard |
Flapper Type | Shark-fin | Flexible |
Packaging & Support(2) | ||
Warranty Period | null | 1 year |
Certifications | null | Unknown |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | Bottom outlet | 2 inches |
Universal Fit | false | true |
Toilet Type Compatibility | One-piece | Pre-1994 |
GPF Compatibility | null | 3.5+ GPF |
Flush Valve Size | 2 | 2 inches |
Products in the top-left offer the best value (high score, low price).
Sources lack independent professional reviews or editorials; descriptions are primarily from the manufacturer and retailers. Fluidmaster categorizes the 506 as an all-rubber 2-inch non-adjustable flapper, noting that its flexible frame is specifically designed to suit oddly sized or angled valves better than rigid solid-frame types. It is emphasized as a simple and easy-to-install replacement for older toilets.
No consumer reviews, ratings, or testimonials are included in the available sources. Consequently, common praise such as ease of install and complaints regarding durability cannot be detailed with real user data.
