The 7 Best Toilet Flappers In 2020

Do you know how much water gets wasted every day because of a leaky toilet tank? Approximately 200 gallons! Every time you go out of the house without fixing your toilet, you waste 200 gallons of water. Aside from being a massive waste of resources, it will increase your water bills, too.

A leaky toilet is a big issue; can you imagine how much water is wasted every day if thousands of households ignore this problem? There are several reasons for having a leaky toilet. A very common one is a broken flapper.

Once you notice that your toilet doesn’t stop running after a flush, your flapper is most likely the problem. There’s no need to call a plumber. Professional services cost a pretty penny, and it’s a simple enough problem even for anyone to fix.

Here’s what you can do – buy a toilet flapper and replace it yourself. Modern flappers are now easy to install. Here are the 7 best selling toilet flappers that you can find on the market today.

Best Toilet Flappers In 2020: Top 7 Picks

ImageProduct NameDimensionsWeightLatest Price
Korky 2021BP G-Max Flapper5 x 4 x 2 Inches15.8 OuncesCheck Price
Kohler Genuine Part GP85160 Flapper5.2 x 3 x 1.8 Inches1.6 OuncesCheck Price
Fluidmaster Water Saving Toilet Flapper6 x 6 x 3 Inches1 PoundsCheck Price
Korky 2001TP Universal Toilet Tank Flapper4.5 x 2.8 x 1.2 Inches4.8 OuncesCheck Price
Fluidmaster Universal Water Saving Toilet Flapper9 x 4 x 3 Inches3.04 OuncesCheck Price
Keeney K833-1 Adjustable Water Saving Flapper13 x 5 x 9 Inches3.2 OuncesCheck Price
TOTO Toilet Flapper Replacement, 3” AfterMarket Flapper4.4 x 4 x 1.9 Inches2.4 OuncesCheck Price

1. Korky 2021BP G-Max Flapper for TOTO Toilet Repairs

Korky 2021BP G-Max Flapper

The Korky brand has been confirmed by buyers as one of the best brands when it comes to toilet issues. If you have a TOTO toilet and you have identified your flapper as the cause of the problem, don’t delay. Replace your broken flapper with a Korky 2021BP G-Max Flapper, which comes with a flapper and a steel chain.

This flapper is durable and is specially made to fit TOTO toilets. You can install it into a 3-inch TOTO flush valve because of its flexible size. The flexible rubber makes a tight seal with the flush valves, eliminating all possibilities of a leak. You don’t have to worry about chemical damage, too; the material of the flapper is designed to resist chlorine, hard water, and water treatment chemicals, so it lasts longer.

If you have a TOTO toilet, the Korky flapper is the best solution to your leaky toilet problems.


Why you should buy this toilet flapper:

  • Installation is easy.
  • It is durable.
  • It fits all 3-inch TOTO flush valves.
  • It is made of flexible rubber.
  • It has a 5-year warranty.


Why you shouldn’t buy this flapper:

  • It may not be resistant to chlorine.
  • It doesn’t fit all toilet types, only TOTO toilets.
  • It doesn’t include a chain sleeve and some parts that are in the original TOTO flapper.

If you want to save money on water bills and keep your toilet working properly without having to worry about leaks, you should go for the Korky flapper. It is designed to make sure you are satisfied with it. Otherwise, the 5-year warranty allows you to return it for replacement or repair.

2. Kohler Genuine Part GP85160 Flapper

Kohler Genuine Part GP85160 Flapper

Saving water is the reason for having a flapper in the first place. You don’t want the water to keep on flowing into the tank. Kohler knows this; that’s why they put a lot of thought into making the Kohler Genuine Part GP85160 Flapper. It helps you save time, water and money.

How would you save time and money with it? Well, this flapper is easy to install; so easy, in fact, that you won’t have to call the plumber and wait for him to have time for you. The minute this Kohler flapper is delivered, you can immediately install it.

The kit includes the flapper, a stainless steel chain, and a floater. The flapper is made of 50% Styrofoam that enhances durability and flexibility. You won’t have to break the bank for it because it is relatively inexpensive for a flapper with its features. It is flexible and can fit all 2-inch flush valves.

Kohler always guarantees durability, that’s why their products always come with a warranty. This particular flapper has a 5-year warranty that ensures you get your money’s worth.


Why you should buy this Kohler flapper:

  • It is easy to install.
  • It is durable.
  • It is inexpensive.
  • It is flexible.
  • It has a 5-year warranty.
  • It fits 2-inch flush valves.
  • It comes with a floater.


Here’s why you shouldn’t buy this:

  • It leaks if not installed properly.
  • Adjusting the float chain may be a bit tricky.

Buyers have confirmed the durability of Kohler products. There is no doubt about their long-lasting and corrosion-resistant properties. Buying a Kohler flapper definitely gives you more value for your money.

3. Fluidmaster Water Saving Toilet Flapper

Fluidmaster Water Saving Toilet Flapper

What do you think about being able to control the amount of water you use for a flush? Nice right? Sometimes you don’t need a full (or even a partial) flush and you feel guilty because too much water is used to flush away waste you can’t almost see.

With the Fluidmaster 502P21 PerforMAX, it is possible to decide how much water to use in your flush. The flapper is dial adjustable, allowing you to spend only the water you need.

It is easy to install with a 5-year warranty, but you won’t always need to use it, as the flapper is made of durable material (hence, “longest-lasting”) that resists attack from bacteria. It fits all 2-inch flush valves and resolves common running water problems.


Why you should buy this Fluidmaster flapper:

  • It is water-saving since you can control the amount of water to be used.
  • It is long-lasting.
  • It is easy to install.
  • It fits 2-inch flush valves.
  • It has a built-in Microban that resists bacteria attack.
  • It has a 5-year warranty.
  • The installation instructions are simple.


Why you shouldn’t buy this flapper:

  • The flapper doesn’t seal properly.
  • The adjustable feature doesn’t work well.
  • The chain sticks out and disrupts flushing.

If you want a flapper that can save water and fit all 2-inch toilets as well, get this Fluidmaster PerforMAX flapper. Its adjustable water feature makes it a better option for most buyers. You can save water as well as money when you buy it.

4. Korky 2001TP Universal Toilet Tank Flapper

Korky 2001TP Universal Toilet Tank Flapper

If you want superior quality and durability, consider the Korky brand. Most buyers have attested to the long-lasting property of their products. Their Korky 2001TP Universal Toilet Tank Flapper, for example, is just one of their many high-quality products. The way this flapper fits into your flush valve saves you a lot of money on water bills.

This flapper is made of chlorazone rubber that is resistant to chlorine. The complete package includes a flapper and a stainless steel chain. Korky makes it easy to install with simple instructions. It is a quick fix for leaking toilets, and the flexible rubber fits all 2-inch flush valve toilet types. It is a great way to fix your toilet and still save money because of its low price.


Here’s why you should buy this toilet flapper:

  • It is easy to install.
  • The instructions for installation are simple.
  • It is made of chlorazone rubber that resists chlorine attacks.
  • It lasts long.
  • It is relatively less expensive than other flappers on the market.
  • It fits 2-inch flush valves.
  • It has a 5-year warranty.


Here’s why you shouldn’t buy this flapper:

  • It gets broken easily.
  • It doesn’t fit tightly.
  • Stopping it from leaking might require a skill.
  • It doesn’t fit all toilet types.

If you want an inexpensive and durable brand for your toilet, get the Korky Universal Toilet Tank Flapper. Most buyers have confirmed that it is durable and fits 2-inch valves. It is a great way to get more value for your money.

5. Fluidmaster Universal Water Saving Long Life Toilet Flapper

Fluidmaster Universal Water Saving Long Life Toilet Flapper

Fluidmaster is definitely an industry leader, which is why it has appeared on this list of the best toilet flappers several times already. The Fluidmaster brand saves you the stress of having to change your flapper repeatedly.

This Fluidmaster 5403 Universal Toilet Flapper is ten times more durable than standard toilet brands. It is made of flexible rubber that is resistant to chemical attacks and fits tightly into flush valves. It fits all toilet types with three-inch flush valves, too. It is easy to install as it includes a mounting arm with two simple adjustments.

There is also an adjustable float ball for OEM performance and a kink-free stainless steel chain. The silicone seal keeps the flapper tightly fitted, and the injection-molded frame makes for a better fitting. Fluidmaster is truly the answer to your leaky toilet issues.


Here’s why you should buy this universal flapper:

  • It is easy to install.
  • It has an adjustable mounting arm.
  • It has an adjustable float ball for OEM performance.
  • It is more durable than standard flappers.
  • It is resistant to chemical attacks.
  • It fits all three-inch flush valves.
  • It has a silicone seal for a tighter fit.
  • It saves water.
  • It has a 10-year warranty.
  • It has a kink-free stainless steel chain.


Here’s why you might want to reconsider buying this flapper:

  • It doesn’t fit all toilet types.
  • It develops air bubbles after a while that reduces the efficacy of the flexible seal.
  • The plastic part wears out easily.
  • It’s a bit too pricey.

The Fluidmaster Universal Toilet Flapper is the solution to your leaking toilet problems. However, the downside of this product is its inability to stop forming air bubbles that weaken the seal. Some buyers have also complained about the plastic part of the flapper that wears out easily. Whatever the case is, it is still a good buy.

6. Keeney K833-1 3-Inch Adjustable Water Saving Flapper

Keeney K833-1 3-Inch Adjustable Water Saving Flapper

If you want a flapper that will minimize water usage while maximizing the strength of a single flush, try the Keeney K833-1 adjustable water saving flapper. Keeney is a brand most Americans trust their toilets with, and so far, there have been many recommendations.

This flapper is made of plastic and has an adjustable no cut overflow tube. It can also fit easily into a variety of toilet types with 3-inch flush valves. Keeney flappers have a silicone seal for a tight-fitting, preventing leaks. This adjustable flapper helps you save water as it maximizes flush strength. It is just right for you if you want to increase your water bill savings.


Why you should buy this water-saving flapper:

  • It has an adjustable flapper.
  • It is made of durable plastic.
  • It fits 3-inch flush valves.
  • It fits most toilet types.
  • It has an adjustable no cut overflow tube.
  • It increases flush strength by 40%.
  • It saves water.
  • It is easy to install.


Here’s why you shouldn’t buy this flapper:

  • The silicone gasket fails in a short time.
  • It needs a caulk to prevent leaks during installation.
  • It doesn’t work properly after a couple of uses.

If you need a toilet flapper that can save up to 2400 gallons of water annually, you need to get the Keeney water saving flapper. The downside of this product, however, is that you might have to change it at intervals. Overall, it is a good buy.

7. TOTO Toilet Flapper Replacement, 3” AfterMarket Flapper

TOTO Toilet Flapper Replacement, 3” AfterMarket Flapper

TOTO is synonymous with quality bathroom fixtures. Most American households recognize the brand not only because of the quality but also because of the style of their products. The TOTO toilet flapper is a high-quality chlorazone rubber flapper that’s long-lasting. It works perfectly with G-Max, THU499S, THU175S, and 2021BP TOTO toilet models.

The complete kit includes a stainless steel chain and a rubber flapper. It is easy to install and doesn’t require any tools. It saves water and makes your toilet as good as new. TOTO stands behind its products, that’s why they guarantee a refund when you’re not satisfied with it.


Here’s why you should buy the TOTO flapper:

  • It is easy to install.
  • It is made of chlorazone rubber that resists chemical attacks.
  • It is a perfect fit for 3-inch TOTO toilet types within the range.
  • It is durable.
  • It saves water.
  • It improves toilet performance.
  • It has a silicone seal.
  • Installation doesn’t require any tools.


Here’s why you should reconsider buying the flapper:

  • It doesn’t fit all toilet types.
  • It doesn’t stop the water from continually filling the tank.

If you’re on a budget and you want a flapper that is affordable and works well, you should get the TOTO toilet flapper. It is so easy to install; you won’t even need any tools.

Toilet Flapper Buying Guide

Getting the best flapper that fits your toilet is not as easy as it sounds. There are so many brands out there, and the only way you can choose the best is to know what to look out for in a toilet flapper. After all, you need to make sure the replacement you will get is durable and does the job well. This toilet flapper buying guide will help you decide on what flapper to buy.

Toilet Flapper Types

There are different types of flappers. Their difference could arise from the material they are made of, their distinctive features like whether or not they have a float and a chain, their flexibility, and many other properties you could use to classify them.

There are adjustable flappers, for example, as well as non-adjustable ones. Adjustable flappers are usually for toilet tanks with flushing capacities of 1.28 to 1.6 gallons of water per flush (GPF). Non-adjustable flappers are for toilet tanks with a flushing capacity of 3.5 to 5 GPF.

So, you need to be sure of the type you need depending on the features that would be best for your toilet.

Toilet Flapper Size Charts

Toilet flappers have different sizes depending on the brand and the type of flapper you need. The standard sizes are the 4-inch flappers, the 3-inch flappers, the 2-inch flappers, the odd-sized flappers, gallons per flush flappers, and the universal flappers.

The 4-inch and 2-inch flappers fit modern toilet types. The 3-inch flapper, on the other hand, is for older toilets. The oddly-sized flappers are usually custom made for special-sized toilets, while the gallons per flush flapper have to fill holes relating to the amount of water they let out in a flush.

There are also universal flappers. This type of flapper fits almost any toilet. If a flapper doesn’t fit a flush valve tightly, it will leak. Knowing the right side of the flapper to use for your toilet will help prevent leaky toilets.

How to measure flapper size

You can measure your flapper size by taking a measuring tape or meter rule to measure the diameter of the drain hole which the flapper covers. This will tell you the size you need.

Flapper Replacement Process

Replacing your flapper is an easy task if you know what to do. Here are the steps to follow:

  • Check for any screws and unscrew the flapper from your toilet with a screwdriver. If the flapper doesn’t have a screw, like generic flappers, you can just yank it off.
  • Check for the toilet brand and buy a replacement flapper of the same brand. You can also buy a universal one. To be sure, though, bring the problematic flapper so you can show it and buy the exact same replacement.
  • If you didn’t have to unscrew the flapper, simply replace the drain hole with the new one. If you had to screw it, replace it and screw it tight, but be careful not to break the barbed plastic pin.
  • If the flapper has a seal, carefully seal the sides of the flapper, and you’re set.

If you have any problems installing your replacement toilet flapper, head to YouTube, and find tutorial videos. You can find almost anything there now!

Frequently Asked Questions (FAQ)

Getting the best toilet flapper is important, so you won’t have to keep replacing it every few months. Here are some of the most common questions about them:

1. How long do flappers last?

The durability of a flapper depends on the quality. However, on average, flappers last for 4-5 years. If you use a chemical cleaner for your toilet, it will barely last a year.

2. How much is a flapper for a toilet?

Getting a plumber to fix your flapper can cost within 50 to 150 dollars. However, buying the flapper and fixing it yourself will cost within 20 to 50 dollars or even less.

3. Are flapper valves universal?

Some flapper valves are universal. However, not all universal flappers can fit all toilet types. You have to be sure of your flush valve size before you buy a flapper.

4. How do you know if your toilet is leaking?

Remove the tank cover and drop one dye tablet or 10 drops of food coloring. Cover the tank, and don’t flush. Wait for 10-15 minutes. If you see the dye or coloring in your toilet bowl, you leak; if you don’t see it, then you don’t leak.

5. How do you replace a toilet flapper?

Open the tank lid, drain all the water, and turn off the water supply to the toilet tank. Take out the old flapper. If it’s screwed, unscrew it and take it out. Replace with the new one, fitting the flapper directly into the drain hole. If it has screws, tighten them. If it has a seal, fit it tightly to the edges of the flapper and allow it to dry. Cover the tank with the lid.


Water wastage is a major problem in the United States, and leaky toilets contribute greatly to it. This problem can be fixed by getting any of the flappers we have mentioned in this review. We have picked the top toilet flappers on the market based on customers’ recommendations.

Choosing any of the flappers we have reviewed will be a win-win for you. Just make sure that whatever you select is the perfect fit for your toilet.

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Jimmy is an avid blogger reviewing toilets and toilet products. In his spare time, he enjoys walking through home improvement stores, rating different bathroom appliances.

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