Korky Flappers by Toilet Fit

For a 2-inch flush valve, pick the Korky 2017BP. For a 3-inch valve, the 3070BP (10-year warranty) or 3060BP. For TOTO, the 2021BP or 2022BP. For an American Standard Cadet 3, the 3040BP.

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This guide compares six Korky toilet flappers using Korky’s own product pages.

Korky flappers compared (Korky product pages)

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The first question is the size of your flush valve opening: 2 inches or 3 inches. Korky says 3-inch valves are found in many newer 1.6 and 1.28 gpf toilets made since 2005. Our 2-inch vs 3-inch flapper guide uses Kohler examples to show how to tell the two apart. Then pick a universal flapper, or a brand-fit flapper if Korky lists one for your toilet. Korky’s warranty page (korky.com) has the terms.

Korky 2017BP Ultra 2X: universal 2-inch, 10-year warranty

Choose the 2017BP for most toilets with a 2-inch flush valve. Korky’s product page (korky.com) calls it its most universal standard 2-inch flapper and says it fits most 2-inch flush valves, including American Standard, Kohler and TOTO. It adjusts to match the original toilet’s settings and lists settings for 1.28, 1.6, 3.5 and 5 gallon-per-flush toilets.

Korky says its Chlorazone II rubber is two times stronger than other toilet flappers and resists chlorine, bacteria, city water treatment, hard water and well water. It is made in the USA, carries a 10-year warranty, and comes with a stainless steel chain and instructions. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 2017BP.

Check Korky 2017BP Ultra 2X 2-inch toilet flapper on Amazon →

Korky 3060BP: universal 3-inch

Choose the 3060BP for most toilets with a 3-inch flush valve. Korky’s product page (korky.com) says it is adjustable to match the original toilet’s performance and fits the large 3-inch flush valves found in newer 1.6 and 1.28 gpf toilets made since 2005. It lists fits for American Standard, Aquasource, Crane, Eljer, Ferguson, Gerber, Glacier Bay, Jacuzzi, Kohler, Mansfield, Pegasus and TOTO.

It uses Korky’s red rubber, is made in the USA, carries a 5-year warranty and includes a stainless steel chain. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 3060BP.

Check Korky 3060BP 3-inch universal toilet flapper on Amazon →

Korky 3070BP 2X: the longer-warranty 3-inch

Choose the 3070BP for a 3-inch valve if you want the longer warranty. Korky’s product page (korky.com) lists the same adjustable universal design and brand fit list as the 3060BP, but with Chlorazone II rubber and a 10-year warranty instead of 5. It includes a stainless steel chain.

Korky’s compatibility list for the 3070 names American Standard models such as Cadet 3, Cadet 3 FloWise HET, Edgemere and Titan Elite by tank number. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 3070BP.

Check Korky 3070BP 2X 3-inch universal toilet flapper on Amazon →

Korky 2021BP: fits TOTO, red

Choose the 2021BP to replace a TOTO THU138S, THU175S or THU331S flapper. Korky’s product page (korky.com) lists an oversized 3-inch sealing surface for TOTO flush valves and names TOTO models it fits, including the ST743S, ST744S, ST754SF, ST764S, ST774S, ST784SF, ST94SF, ST814S, CST756204SF, SCT853S, CST845S and CST874SF.

It is red rubber, made in the USA, carries a 5-year warranty and includes a stainless steel chain. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 2021BP.

Check Korky 2021BP fits TOTO red 3-inch flapper on Amazon →

Korky 2022BP: fits TOTO, blue

Choose the 2022BP to replace a TOTO THU140S flapper. Korky’s product page (korky.com) lists a 3-inch blue rubber flapper for TOTO flush valves and names the CST854, CST864, CST866, CST884 and CST924154F as fits. The page also warns that it does not fit some TOTO models, so check the list before ordering.

It is made in the USA, carries a 5-year warranty and includes a stainless steel chain. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 2022BP.

Check Korky 2022BP fits TOTO blue 3-inch flapper on Amazon →

Korky 3040BP: fits American Standard Cadet 3

Choose the 3040BP to replace the flapper in an American Standard Cadet 3. Korky’s product page (korky.com) says it replaces American Standard part 738920-0070 and the Pegasus Colonnade flapper, and lists Cadet 3 models 2403, 2568, 2907, 4000, 4007, 4019, 4021, 4027 and 4202.

It is red rubber, made in the USA, carries a 5-year warranty and includes a stainless steel chain. For more American Standard options, see our American Standard flapper guide. On October 15, 2026, the standard new offer sold by Amazon.com was in stock with model 3040BP.

Check Korky 3040BP fits American Standard Cadet 3 flapper on Amazon →

Universal or brand-fit?

Universal. The 2017BP, 3060BP and 3070BP are adjustable, which Korky says lets you match the original toilet’s flush. Set the adjustment to your toilet’s flush volume; the 2017BP page lists settings from 1.28 to 5 gallons per flush.

Brand-fit. The 2021BP, 2022BP and 3040BP are made to replace specific TOTO and American Standard flappers. If your toilet is on one of those lists, the brand-fit part is the closer match. For TOTO, also see our TOTO flapper guide.

Chain. Each Korky part includes a stainless steel chain, so you do not need to reuse the old one.

Warranty. The 2X parts carry 10 years; the others 5.

Check these before you order

• Valve size. 2-inch or 3-inch; measure the opening.
• Toilet model. Look inside the tank for the model or tank number and match it to Korky’s lists.
• TOTO color. Red (2021BP) and blue (2022BP) fit different TOTO toilets.
• Adjustment. Set the universal flappers to match the original flush.
• Leak source. A worn flush valve seat can leak even with a new flapper.
• Warranty. 10 years on the 2X parts, 5 on the rest.

Which Korky flapper should you buy?

For a 2-inch valve, the 2017BP. For a 3-inch valve, the 3070BP for the longer warranty or the 3060BP. For TOTO toilets, the 2021BP or 2022BP depending on your model. For an American Standard Cadet 3, the 3040BP. To compare Korky with Fluidmaster, see our Korky vs Fluidmaster guide; for other brands, our toilet flapper guide.

Frequently asked questions

Which Korky flapper is universal?

The 2017BP for 2-inch valves and the 3060BP and 3070BP for 3-inch valves.

What is the difference between Korky 3060 and 3070?

Korky lists the same fit for both; the 3070 uses Chlorazone II rubber and carries a 10-year warranty instead of 5.

Which Korky flapper fits TOTO?

The 2021BP replaces THU138S, THU175S and THU331S; the 2022BP replaces THU140S.

Does a Korky flapper come with a chain?

Yes. Each of these includes a stainless steel chain.

Which Korky flapper fits an American Standard Cadet 3?

The 3040BP, which Korky says replaces part 738920-0070.

How we chose

This document-based guide makes no hands-on testing claim. We read Korky’s product pages for the 2017, 3060, 3070, 2021, 2022 and 3040 flappers and its warranty page. On October 15, 2026, we checked each linked standard new Amazon offer for model, seller, stock and an add-to-cart button. Read our selection method and about Plumbing Picks.

Primary sources

• Korky 2017 Ultra 2X page (korky.com): 2-inch universal, 10-year.
• Korky 3060 page (korky.com): 3-inch universal, 5-year.
• Korky 3070 page (korky.com): 3-inch 2X, 10-year.
• Korky 2021 page (korky.com): TOTO THU138S fit list.
• Korky 2022 page (korky.com): TOTO THU140S fit list.
• Korky 3040 page (korky.com): AS Cadet 3 fit list.
• Korky warranty page (korky.com): terms.