American Standard 3-Inch Flapper
Score: 70/100
Korky 100BP
Score: 90/100Rankings
The Korky 100BP Ultra High Performance Flapper is a universal 2-inch toilet flapper designed to maximize flush performance while conserving water across various gallon-per-flush ratings. Constructed from exclusive chlorine-resistant red rubber, it offers superior durability in harsh water conditions and features adjustable settings for precise water optimization. It is best suited for homeowners with standard 2-inch toilets in areas with chlorinated, hard, or well water.
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 | 2 inches | |
1 countbest | 1 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Material & Durability(2) | ||
Material | Plastic | Rubber |
Seal Type | Standard | Sealing Ball |
Design & Features(4) | ||
Chain Material | Standard | Stainless Steel |
Chain Adjustability | false | true |
Installation Type | Direct Replacement | DIY |
Flapper Type | Standard Flapper | Adjustable Flapper |
Packaging & Support(1) | ||
Warranty Period | 1 Year Limited | 5 Years |
Compatibility & Fit(6) | ||
Flush Valve Compatibility | American Standard Cadet 3 | 2-inch |
Universal Fit | false | true |
Flapper Diameter (inches) | 3 inches | 2 inches |
Toilet Type Compatibility | Two-Piece | Standard |
GPF Compatibility | 1.6 | 1.28-5 |
Flush Valve Size | 3 inch | 2 |
Products in the top-left offer the best value (high score, low price).
Professional reviewers and plumbing experts, including those from Clorox, highly endorse the Korky 100BP as the longest-lasting flapper available. Editors at supply sites praise its high performance and precise water control, noting that it significantly outperforms generic brands in chlorine resistance tests. The product is highlighted for its universal design, making it ideal for contractors who need a single solution for various toilet brands, with no performance drop across different flush volumes.
Everyday consumers rave about the product's longevity, with many reporting it lasted up to seven years in harsh water conditions. Users frequently praise the ease of installation, noting it takes only five minutes without tools. Common themes include strong flush performance despite water savings and perfect fits for brands like Kohler. Recurring complaints focus on the chain being too long and occasional initial seal issues that require adjustment.
“lasted 7 years in hard well water”
“5 minutes, no tools”
“saves hundreds of gallons yearly”
