
American Standard 3-Inch Flapper
Score: 70/100
TOTO THU500S Flapper
Score: 75/100Rankings

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.

The American Standard 738920-0070A is a genuine OEM replacement toilet flapper assembly designed specifically for American Standard Cadet 3 model toilets. It offers a reliable, pre-assembled solution for standard 1.6 GPF flushing needs. However, its plastic construction and strict model compatibility limit its versatility and long-term durability compared to premium materials.
| Attribute | ![]() | ![]() |
|---|---|---|
3 inchesbest | 3 inchesbest | |
1 countbest | 1 countbest |
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| Attribute | ![]() | ![]() |
|---|---|---|
Material & Durability(2) | ||
Material | Plastic | Polypropylene/Rubber |
Seal Type | Standard | Rubber |
Design & Features(3) | ||
Chain Adjustability | false | true |
Installation Type | Direct Replacement | Tool-Free |
Flapper Type | Standard Flapper | OEM Flapper |
Packaging & Support(1) | ||
Warranty Period | 1 Year Limited | 1 Year |
Compatibility & Fit(3) | ||
Flush Valve Compatibility | American Standard Cadet 3 | TOTO 3-Inch |
Toilet Type Compatibility | Two-Piece | TOTO Specific |
GPF Compatibility | 1.6 | null |

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.
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