
TOTO THU500S Flapper
Score: 75/100
Hibbent Toilet Flapper
Score: 80/100Rankings

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.

The TOTO THU500S is a 3-inch OEM replacement flapper designed exclusively for select TOTO toilets with 3-inch flush valves. It features a polypropylene body with a rubber sealing surface and includes an attached chain for straightforward installation. Ideal for DIY tank maintenance in residential bathrooms to fix leaks or inconsistent flushing.
| 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 | Polypropylene/Rubber | Rubber |
Design & Features(3) | ||
Chain Material | Standard | Stainless Steel |
Installation Type | Tool-Free | No-Tool |
Flapper Type | OEM Flapper | Flapper |
Packaging & Support(1) | ||
Pack Quantity (count) | 1 count | 2 count |
Compatibility & Fit(2) | ||
Flapper Diameter (inches) | 3 inches | 3.0 inches |
Toilet Type Compatibility | TOTO Specific | Gerber 99-788 |

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

Product descriptions characterize it as a quiet, dependable OEM upgrade that transforms frustration into reliable performance, emphasizing its adjustability and precise fit for TOTO tanks.
There is no available consumer feedback, testimonials, or forum discussion data for this product.




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.