
Danco FLT231T Flapper
Score: 88/100
Korky 2023BP
Score: 88/100Rankings

The Danco FLT231T HydroStop is a flapperless toilet repair kit that replaces traditional rubber flappers with a sturdy vertical-closing tower mechanism. It utilizes patented S.T.O.P. Technology to prevent bowl overflows and features a chemical-resistant silicone seal with a stainless steel cable. Ideal for homeowners seeking a permanent solution to leaking toilets.

The Korky 2023BP is a specialized 3-inch adjustable flapper engineered specifically for TOTO toilets, featuring durable Chlorazone rubber that resists chlorine and hard water damage. While it offers excellent adjustability and a strong warranty, its compatibility is strictly limited to TOTO models, making it unsuitable for other brands. It is best suited for owners of high-efficiency TOTO toilets experiencing leaks or running water issues.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 3 inchesbest | |
1 countbest | 1 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Material & Durability(2) | ||
Material | Silicone | Chlorazone rubber |
Seal Type | Vertical Tower | Tight seal |
Design & Features(3) | ||
Chain Material | Stainless Steel | Stainless steel |
Installation Type | Tool-Free | Tool-free |
Flapper Type | HydroStop Tower | Adjustable |
Packaging & Support(1) | ||
Warranty Period | Standard | 5 years |
Compatibility & Fit(5) | ||
Flush Valve Compatibility | 2 to 2.5 inches | TOTO 3-inch |
Universal Fit | true | false |
Flapper Diameter (inches) | null inches | 3 inches |
Toilet Type Compatibility | Standard | HET |
GPF Compatibility | null | 1.28-1.6 |



Professional reviewers describe the HydroStop as a product that 'should be the new industry standard,' highlighting its significant water-saving benefits and effective prevention of overflow-related messes.
The search results do not include specific user reviews, customer testimonials, or recurring complaints from everyday consumers.

Professional reviewers and editors emphasize the product's reliability and ease of use. Home Depot notes that it quickly solves common leak and running toilet problems and is easy to install. The manufacturer highlights the exclusive longest-lasting red rubber and the tight seal it provides.
There is no available consumer review data, common praise, or recurring complaints in the source material. Product pages highlight manufacturer assurances of ease and durability without user voices or testimonials.

