
Fluidmaster 5403 Flapper
Score: 92/100
Hibbent Toilet Flapper
Score: 80/100Rankings

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 Hibbent 2 Pack Toilet Flapper Replacement is a blue rubber flapper designed as a direct replacement for the Gerber 99-788 model, featuring durable material and no-tool installation. It is limited to specific Gerber models, which restricts its universal applicability. It is ideal for DIY repairs in homes with city, hard, or well water, offering a quick, tool-free fix that meets US/Canada plumbing standards.
| Attribute | ![]() | ![]() |
|---|---|---|
3 inchesbest | 3 inchesbest | |
1 count | 2 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Material & Durability(1) | ||
Material | Silicone | Rubber |
Design & Features(3) | ||
Chain Material | Kink-free | Stainless Steel |
Installation Type | DIY | No-Tool |
Flapper Type | Adjustable Flapper | Flapper |
Packaging & Support(2) | ||
Pack Quantity (count) | 1 count | 2 count |
Certifications | US and Canada Plumbing Code Standards | |
Compatibility & Fit(4) | ||
Universal Fit | true | false |
Flapper Diameter (inches) | 3 inches | 3.0 inches |
Toilet Type Compatibility | High-efficiency | Gerber 99-788 |
Flush Valve Size | 3 | 3 inches |

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

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.




Installation tutorials and video demonstrations highlight the straightforward nature of the replacement, praising the quick setup and the reliability achieved through proper seal cleaning.
Product pages imply positive sentiment regarding leak prevention and water savings, with video demos suggesting that users find the chain adjustments user-friendly and the overall installation process positive.