
Fluidmaster Glacier Bay Flapper
Score: 85/100
Korky 2023BP
Score: 88/100Rankings

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.

The Fluidmaster 5401GBP4 is a durable 3-inch adjustable silicone flapper designed primarily for Glacier Bay and similar high-efficiency toilets. Its main limitation is its lack of universal fit, making it less suitable for non-compatible brands. It is best suited for owners of Glacier Bay toilets seeking a long-lasting upgrade with water-saving adjustability.
| Attribute | ![]() | ![]() |
|---|---|---|
3 inchesbest | 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 | Rubber/Silicone | Chlorazone rubber |
Seal Type | Silicone | Tight seal |
Design & Features(2) | ||
Chain Material | Unknown | Stainless steel |
Installation Type | Direct Replacement | Tool-free |
Packaging & Support(1) | ||
Warranty Period | 10 years | 5 years |
Compatibility & Fit(3) | ||
Flush Valve Compatibility | 3 inches | TOTO 3-inch |
Toilet Type Compatibility | Post-1994 HET | HET |
GPF Compatibility | 1.28-1.6 GPF | 1.28-1.6 |

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

Search results lack dedicated expert reviews from major review sites like Wirecutter or Consumer Reports. Retailer and manufacturer pages emphasize reliability, corrosion resistance, and water-saving capabilities, positioning the product as a high-quality upgrade specifically for Glacier Bay toilets.
Consumer feedback from Home Depot reviews is consistently positive, praising the ease of installation and the product's effectiveness in stopping leaks and fixing running toilets.

“Easy to install and effectively stops leaks in many toilet models.”




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.