Search  for anything...

Korky Ultra Standard 2-Inch Universal Toilet Flapper - Long Lasting Rubber - Easy to Install - Made in USA, 100BP

  • Based on 15,122 reviews
Condition: New
Checking for the best price...
$6.84 Why this price?
Save $5.74 was $12.58

Buy Now, Pay Later


As low as $1 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Sep 15
Order within 23 hours and 5 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Number of Items: 1


Features

  • Made in United States

Description

"The Korky Ultra High Performance Flapper is the most universal 2 inch flapper available. The flapper adjusts to match original toilet settings and eliminates water waste by decreasing the amount of water flushed. Ideal for all standard 2 inch toilets, including: 1.28, 1.6, 3.5 and 5 gallons per flush (gpf). The adjustable flapper has multiple settings to ensure it fits popular 2 inch toilet models. Made of flexible rubber for a tight seal and easy to install, the 100 includes: (1) Adjustable Flapper and (1) Stainless Steel Chain. The 100 toilet flapper fits the following toilet brands, models and tank numbers: Fits Aqua Source: Aqua Project Source (CP-321) | American Standard: Cadet (4029, 4078, 4083, 4053, 4650), Evolution 2 Flowise (4061), Monarch (4003), Mainstream (4061) | Crane: Galaxy (3742) | Gerber: Viper (28-590) | Glacier Bay: WCRS1 | HD Supply: Seasons (564830) | Kohler: Portrait (K-4590), Wellworth (K-4620, K-4512, K-4519) | Seasons: Anchor Point (564830) | Sterling: Riverton (404522), Stinson (402091), Windham (404555) | TOTO: Carusoe (706), and many more!" From the Manufacturer "The Korky Ultra High Performance Flapper is the most universal 2 inch flapper available. The flapper adjusts to match original toilet settings and eliminates water waste by decreasing the amount of water flushed. Ideal for all standard 2 inch toilets, including: 1.28, 1.6, 3.5 and 5 gallons per flush (gpf). The adjustable flapper has multiple settings to ensure it fits popular 2 inch toilet models. Made of flexible rubber for a tight seal and easy to install, the 100 includes: (1) Adjustable Flapper and (1) Stainless Steel Chain. The 100 toilet flapper fits the following toilet brands, models and tank numbers: Fits Aqua Source: Aqua Project Source (CP-321) | American Standard: Cadet (4029, 4078, 4083, 4053, 4650), Evolution 2 Flowise (4061), Monarch (4003), Mainstream (4061) | Crane: Galaxy (3742) | Gerber: Viper (28-590) | Glacier Bay: WCRS1 | HD Supply: Seasons (564830) | Kohler: Portrait (K-4590), Wellworth (K-4620, K-4512, K-4519) | Seasons: Anchor Point (564830) | Sterling: Riverton (404522), Stinson (402091), Windham (404555) | TOTO: Carusoe (706), and many more!"

Manufacturer: ‎Korky


Part Number: ‎100BP


Item Weight: ‎1.4 ounces


Product Dimensions: ‎4 x 7 x 2 inches


Item model number: ‎100BP


Size: ‎Small


Color: ‎Red


Style: ‎1 PACK


Finish: ‎Red


Material: ‎Rubber


Pattern: ‎Flapper


Shape: ‎2 Inch


Item Package Quantity: ‎1


Number Of Pieces: ‎1


Included Components: ‎Chain(1) Toilet Flapper, Flapper


Warranty Description: ‎5 Year Warranty


Date First Available: July 23, 2008


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Fixed My Ghost Flushing Problem Instantly
Material Type: Rubber Color: Red
This Korky Universal Toilet Flapper solved my toilet's ghost flushing problem completely. My toilet would randomly refill throughout the day, and I knew I was wasting water, but I wasn't sure exactly what was causing it. After replacing the old flapper with this one, the issue disappeared immediately. Installation was quick and straightforward, and the flapper fit perfectly without any adjustments. It's been working flawlessly ever since, and my toilet no longer runs or refills on its own. For such an inexpensive part, it saved me from a very annoying problem and potentially higher water bills. If you're dealing with ghost flushing or a toilet that keeps refilling itself, I highly recommend giving this flapper a try. ... show more
Reviewed in the United States on June 19, 2026 by _.EfraiN._

  • Awesome Flappy Thingie
Material Type: Rubber Color: Red
We live in a rental with an older toilet and the bloody flappy thingie was deteriorating....water was running non stop in the tank. We called the landlord a bajillion times which netted a lot of promises and no fix-kind of like long distance boyfriends LMAO. I finally just had my oldest son measure the bloody flappy thingie and looked it up on Amazon...where I found this. I can say with complete confidence and sincerity that his flappy thingie works perfect, is compatible with my older toilet, seals just fine, the tank now fills and then goes silent, and was a snap to put in. Such an easy fix. Worth every penny and solved the near six months of aggravation of waiting for a landlord to fix it. Of course, when we move out this summer, we are putting the old one, currently dried off and kept in a plastic bag under the sink, back in the tank...because I'm petty that way when irritated. ... show more
Reviewed in the United States on April 23, 2026 by Kat

  • Exactly what we need to replace a leaky flapper.
Material Type: Rubber Color: Red
Exact fit for our toilet and works well. The listing gave detailed measurements and instructions. Great price and easy to install.
Reviewed in the United States on July 18, 2026 by Carol Bloom

  • These work well and are priced to be a great value
Material Type: Rubber Color: Red
I do wish they had some that weren't adjustable though. These do seem to seal well, at least when new. Great value for the money. Super easy to install and replace old flappers. No idea how long they will last, but I expect that they'll last as long as the ones I'm replacing which was years at least. ... show more
Reviewed in the United States on October 24, 2025 by Jeff

  • It’s perfect 🤩
Material Type: Rubber Color: Red
It is perfect and easy to install. Instillation for a female who knows nothing about toilet plumbing on taken less than a minute to install. It fixed my toilet running water issue. I am extremely satisfied ⭐️⭐️⭐️⭐️⭐️⭐️⭐️
Reviewed in the United States on July 13, 2026 by Jennifer Jordan

  • Fits perfectly, super easy to install
Material Type: Rubber Color: Red
Easy to install, works perfectly! It totally stopped the leak.
Reviewed in the United States on July 22, 2026 by Bai L Ling

  • Trusted brand. Excellent product.
Material Type: Rubber Color: Red
We bought our house a few years ago and I've had to replace 3 flappers. I've done korky in all 3. They're super easy to install and they work great.
Reviewed in the United States on July 12, 2026 by Michael sullivan

  • Not great
Material Type: Rubber Color: Red
It doesn't work as it should. It doesn't go back to close to stop the water from running down after the flush. Didnt have that issue with the old one but it broke from being old. Both Exactly Same brand.
Reviewed in the United States on May 28, 2026 by lesly

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...