
Korky 54BP
Score: 75/100
Fluidmaster 5403 Flapper
Score: 92/100Rankings

The Fluidmaster 5403 is a universal adjustable 3-inch toilet flapper designed for high-efficiency toilets, featuring a durable silicone seal and customizable flush volume settings. It offers a solid frame to prevent twisting and includes an adjustable dial to optimize water usage between 1.28 and 1.6 gallons per flush. It is ideal for quick DIY fixes for ghost flushing, water conservation in homes with hard water or chlorine, and universal replacement in brands like Kohler, Toto, or American Standard.

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 inches | 3 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 | Silicone |
Design & Features(3) | ||
Chain Material | Stainless Steel | Kink-free |
Installation Type | Standard | DIY |
Flapper Type | Standard | Adjustable Flapper |
Packaging & Support(1) | ||
Warranty Period | 1 year | 10 Years |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | 2 inch Plastic/Brass | Universal |
Flapper Diameter (inches) | 2 inches | 3 inches |
Toilet Type Compatibility | Gravity-fed | High-efficiency |
GPF Compatibility | 1.28-5 | 1.28-1.6 |
Flush Valve Size | 2 inch | 3 |


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.

Professional reviewers, including Home Improvement expert Bob Vila, highly recommend the Fluidmaster 5403 as the best overall 3-inch flapper for fixing running toilets. Experts praise its universal fit, adjustability, and durable silicone construction, noting that it provides quality you can trust for eliminating leaks in newer high-efficiency toilets.
Everyday consumers generally praise the Fluidmaster 5403 for its ease of installation, water savings, and longevity. Users frequently report that it stops running toilets quickly and fits a wide variety of brands. While some users mention a learning curve for adjustments, the overall sentiment is positive, highlighting its reliability and durability compared to standard flappers.

