Best Toilet Flapper Reviews 2021 – Top Selections By Plumbing Experts

You cannot avoid some of the things that we never usually think. A well effective clean toilet plays a great role to lead a happy hygienic life. But what happens if the toilet is not working properly? Sometimes the noise of a runny toilet can irritate you.

It can disturb your attention, it can wake you up at the mid of the night. At that time the repair of the toilet is the most important thing. The best toilet flapper can help you greatly at that time.

Best Toilet Flapper for 2021 – Comparison


Product Name


Item Weight


Toto THU500S

3 inch

3.2 ounces

Kohler BLUE PART GP85160


1.82 ounces

American Standard 7381129-200.0070A


1.6 ounces



2.82 ounces

American Standard 738920-0070A

3 inch

4.2 ounces

2 Pack Toilet Flapper Replacement

3 inch

3.52 ounces

This review provides a shortlist of high profile toilet flappers of 2021 to help you get the best product for the fixing of your toilet. If you use the traditional toilet flapper, you need to replace the toilet flapper within a short time. They don’t have the characteristics of what the top quality toilet flapper has.

Analyzing all the information, customer review, quality of the product we have to make a shortlist here so that you can make a quick and perfect decision about purchasing the quality products. This review comes with a proper buying guide to make you more clear about the toilet flapper and make a correct decision.

10 Best Toilet Flapper Reviews

1. Fluidmaster 400CRP14 Universal Toilet Fill Valve and Flapper Repair Kit

People always love to enhance efficiency as well as the performances of the good quality toilet. If you are the group of those efficiency desiring people, Fluidmaster 400CRP14 Universal Toilet Fill Valve and Flapper Repair Kit for you. It is a trusted product for the overall performance of the toilet.

Fluidmaster 400CRP14 Universal Toilet Fill Valve and Flapper Repair Kit

This is a universal toilet fill valve. It means it will easily suit most of the toilets. You can get this package with the Fluidmaster 400A toilet fill valve. You will also get Fluidmaster 501 2” flapper. Both are durable and provide long-lasting durability. It is also a proper product if you want a DIY upgrade. If you are going through toilet fill problems, it can be the perfect solution.

It provides an easy and quick installation facility. It is a reliable toilet kit to fix most of the toilet leakage problems. This product comes with a solid frame. It also ensures corrosion-resistant materials. You can also fix your noisy running toilet with this package. It comes with plastic or rubber materials along with the five years warranty.


  • Stronger plastic or rubber materials
  • Long-lasting high-quality materials
  • Perfect to use 3.5 gallons of water per flush
  • Features 400A Fill Valve along with the 501 Flapper
  • Reduce bacteria


  • Kohler toilet is not recommended for this product

2. Fluidmaster 502P21 2-Inch Universal PerforMAX Longest Lasting

If you are looking for some kinds of toilet flapper that can save the water in every flush of your toilet, you can check this product. Fluidmaster is a renowned brand proving the quality of toilet flappers. Having a Fluidmaster 502P21 2-Inch Universal PerforMAX Longest Lasting toilet flapper in your house, you are totally out of worry of the runny noisy toilet.

Fluidmaster 502P21 can be your perfect solution for your common leakage of your toilet. You may have a corroded with leaky flapper in your toilet. You can just replace it with your problematic toilet flapper. This toilet flapper provides an easy installation process. If your toilet requires 2” flush valve, this toilet flapper is perfect for you. It fits most of the toilets easily.

This toilet flapper comes with durable strength materials. To ensure the quality, this toilet flapper provides a 5 years warranty. It also saves water per flush. So, you can save your money as well by using this flapper in your toilet and you can fix your runny toilet as well.


  • Easy installation procedure
  • High-quality materials
  • Saves water per flush
  • Provides 5 years warranty
  • Fix leakage perfectly


  • Does not suit all types of toilets

3. Toto THU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks

Toto is always beside you when you want to replace or fix your toilet flapper with a newer one. Toto THU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks provides a wonderful one pack toilet flapper that is effective if you want to fix your runny toilet.

Toto THU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks

Toto THU500S Replacement Flapper features plastic materials. It is strong and durable. The color of this product is red although the color does not make any sense in this case. This toilet flapper is perfect for the 3 Inch Flush Valve Tanks. You can replace you with it if the size perfectly matches with your toilet.

This flapper features a 3-inch sealing surface. It makes it stronger compared with other traditional flappers. You can use it for a long time without any more replacement. It provides a quick and simple installation process.


  • Simple installation process
  • Features 3 inch sealing surface
  • Perfect for the 3-inch flush valve tanks
  • High-quality plastic materials
  • Imported materials are used to make it more effective


  • Is not perfect for all kinds of toilets


Kohler is always special for most of the users. It provides high-quality products like other top manufacturers. If you are searching for a genuine Kohler toilet flapper, it won’t be difficult anymore. You can fix your runny toilet with a genuine product, Kohler is beside you.


Kohler genuine toilet flapper features 2-inch toilet flapper. It also suits most of the toilet toilets rather than the usual toilet flapper. You can use this flapper in the two-piece toilet. If you are using the KALLISTA toilet, you can also use it. It is blue and it floats easily with the rise of water. It is a water-saving toilet flapper. So, less water will be released in every flush by using this flapper.

Kohler provides a durable long-lasting toilet flapper. The installation process is always a concern to the user. It is very much easy to install in your toilet. This is an effective flapper that will easily make a solution of your leakage toilet. You will also get the product warranty with the product.


  • Genuine part flapper
  • Quick installation
  • Durable
  • Suits most of the two pieces of toilet
  • Provides product warranty


  • Does not perfect for the one-piece toilet

5. American Standard 7381129-200.0070A Universal Flapper

You always need an efficient and effective replacement part for your toilet as you don’t replace it now and then.  American Standard 7381129-200.0070A Universal Flapper and Chain with Float for 2-Inch Flush Valves are featured very much effective and efficient toilet flapper parts for you in case of fixing your toilet problem.

American Standard 7381129-200.0070A Universal Flapper

This universal toilet flapper comes with the 2-inch toilet flush valve. There you will find a chain and a hook with the flapper. It will make sure the proper floating level of the water and ensure the perfect measurement of water per flush. The float and clips increase their performances. It is designed for the busy lifestyle. Hence, you can use this for a toilet that is frequently used.

The performances and the reliability of the flapper are excellent. The ingenious features will make you happier than any other traditional toilet flapper. It also follows the proper standard of product and this product.


  • High-quality product
  • Universal flapper
  • Features chain and hook with the flapper
  • Reliable and durable
  • Features 2-inch flush valve


  • Not perfect for all toilet models


Kohler is always special to so many users and it comes to our list for the second time with different models. Some people love the flapper that features without any float. Kohler BLUE ASSEMBLY PART GP87449 FLAPPER WITHOUT FLOAT is a perfect solution of your runny toilet that doesn’t come with the float.


This flapper model is for the two-piece toilet with various models. The flapper features a 2-inch flapper model. There is not float is used with the 3.5 gallons of water per flush is used. You can use this toilet flapper in your STERLING and KALLISTA toilets.

This toilet flapper provides the longevity of the uses. It is an effective and perfect solution for the replacement. This flapper won’t give you any pain at the time of installation. So, the genuine toilet flapper part can be the solution to your toilet problems.


  • Used for most of the two-piece toilet
  • Features 2 inch flapper toilet
  • Easy installation
  • Provides longevity
  • Ensures original product performances


  • Is not ideal for one piece of toilet

7. American Standard 738920-0070A 3-Inch Flapper Assembly

The durable and reliable toilet flapper is a crying need for those who are tired of replacing the toilet flapper for fixing the problem. American Standard 738920-0070A 3-Inch Flapper Assembly is here to fix your problem along with fixing the toilet’s problem.

Best Toilet Flapper

This is a high-quality toilet flapper. All the parts and hardware are well designed and engineered to enhance the performances. It is ideal for a busy lifestyle. The performances and the reliability of this product will make a great impression on the customers. It is a 3-inch toilet flapper. If your toilet matches with the model, don’t make any delay to fix with your toilet with this flapper.

This flapper is durable and well reliable. It will not make your toilet leak within a short time.  The hard plastic body with soft silicon type material ensures the actual seal.


  • Hard plastic body
  • Durable and reliable
  • Features 3 inch toilet flapper
  • Easy to assemble
  • High-quality product


  • Does not suit all toilet models

8. 2 Pack Toilet Flapper Replacement

When you are looking for two-pack toilet flappers, Gerber 99-788 makes your task easy. Gerber 99-788 is a perfect replacement for your toilet if you want to save water along with fixing the leakage of your toilet.

2 Pack Toilet Flapper Replacement

If you have an old, leaky, noisy toilet that makes a problem with the regular uses, you can choose Gerber 99-788. It is an efficient toilet flapper that gives the solution to most of your leakage problems. You can also save the water uses per every flush of your toilet and you can save the wastes of water. The blue rubber is the perfect fit for water treatment.

The installation process is simple and easy. You don’t need any kinds of additional equipment for installation. This product also fulfills the US and Canada industry standards for plumbing code. It is durable and reliable.


  • High performances toilet flapper
  • Two-pack toilet flapper
  • No additional tools are needed for installation
  • Ensures the US and Canada industry standard
  • Saves water


  • Is not compatible with all models of toilet

9. Korky 2021BP G-Max TOTO Toilet Repairs-Large 3-Inch Flapper

Korky 2021BP G-Max TOTO Toilet Repairs-Large 3-Inch Flapper is a universal toilet flapper. It is designed perfectly with the proper sealing surface. Hence, it easily fit with most of the toilet.

Korky 2021BP G-Max TOTO Toilet Repairs-Large 3-Inch Flapper

This toilet flapper offers a high-quality product. The high-quality materials make it more useable and reliable. Clomazone rubber is used in this product. It helps to reduce bacteria. So, you don’t have to worry about the chlorine, hard water, and well water. You can replace it with this toilet flapper with the newer or older model toilet. This is a three-pack flapper package.

You can install this flapper in your toilet without any additional tools. This product features a 3-inch flapper with a stainless steel chain. This efficient toilet flapper is designed and manufactured in Wisconsin. It is durable with perfect efficiency. You don’t have to worry about the installation. You can assemble this flapper easily.


  • Three pack toilet flapper
  • Features 3 inch toilet flapper
  • Easy to assemble
  • Chlorazone rubber is used
  • Proudly designed and manufactured in the USA


  • You have to choose the perfect model to suit your toilet properly


Are you irritated by the disgusting running toilet noise? You can make this noise vanish with the magical power of the TOTO POWER GRAVITY TOILET FLAPPER REPLACEMENT PART- 3″ inch – Ideal for Model THU140S. Toto toilet flapper is the perfect decision to make the replacement or fixing the leakage of the toilet.


This toilet flapper features a 3-inch toilet flush valve. It comes with a universal design so that it can be easily fitted with most of the toilet models. After all, you need to check the model for the perfect match of your toilet size. It is made of high-quality materials. The TPR material ensures the quality of the product. The silicone red rubber makes a perfectly tight seal. This feature also includes a stainless steel chain with a hook.

It is durable and efficient. The installation process is also simple. You only need five minutes to install it. It also provides a unique design with preferable efficiency.


  • High-quality materials
  • silicone red rubber is used for the perfect seal
  • Stainless steel chain with a hook
  • Long-lasting flapper
  • Easy and quick installation


  • Correct design is needed for the toilet

What to Consider At The Time Of Buying The Best Toilet Flapper

You can say selecting the good toilet flapper is as important as fixing the leaking toilet. There are some characteristics that all the top rated toilet flappers have.  You need to know the common quality of the flapper, the effective characteristic of the flapper that you want to buy. You need to read through the whole review for a better understanding.

Consider Your Preferable Type

There are many flappers in the markets. Again you will get some good quality products with a variation. So you need to pick the preferable toilet flapper for your toilet. You can also see the variation with the flashing capacity.

Flashing Capacity

You can pick the toilet flapper according to the flushing capacity. With the variation of the capacity, it can be adjustable or non-adjustable. Adjustable toilet flapper use 1.28 to 1.6 gallon of water in every flush. Non-adjustable toilet flapper use 3.5 gallons to 5 gallons of water in every flush. So, you can choose your preferable one with the capacity of the water uses.

Right Size Toilet Flapper Valve

It is one of the most important characteristics. If you buy the best product and it does not match with your toilet, it will not make any sense. It will be useless although you buy a good one. So it is important to make the right pick with the right size. The manufacturers usually produce 2 inches and a 3-inch toilet flapper valve. Additionally, you need to know that the 2-inch toilet flapper valve comes with a solid frame and it is flexible. On the other hand, the 3-inch toilet valve comes with a solid frame that is accessible.

Frame Type

The frame type is also important. The frame can be solid or flexible. If you choose the flexible frame you will get the pure rubber durable frame. The advantage of this frame is it can be suited with most of the toilet flush valve drains. If you choose the solid one, you will get the hard plastic frame. The solid frame is more durable compared with the flexible frame.


The materials also play a vital role here. Most of the right toilet flappers come with high-quality plastic materials. You will see some silicone rubber also. Whether it is plastic or rubber, the materials might come with high quality. Otherwise, the toilet will make leakage within a short period.

Universal Design

Most of the top quality toilet flappers come with the universal design to suit most of the toilets. Although the design is not perfect for all the toilets, it covers most of the toilets. The manufacturers produce the flapper considering the old model toilet as well as the new model toilet. They tried to make the replacement more universal.

Ability to Remove Leakage

You need a toilet flapper that is very much effective. If your toilet leaks after replacing the toilet flapper, it is just a waste of money. Hence, the toilet flapper must have the top accuracy to remove the leakage of the toilet.


High-quality toilet flappers will provide you the advantage of water-saving. It saves water in every flush of your toilet use. Thus it saves the waste of water and it also helps our ecology as well. By saving water it also saves your money from the water bill.

Easy to Install

The good toilet flapper always provides a clear guideline about the installation. If you need an extra person for the installation of the toilet flapper, it will both cost time and money. All the high-quality toilet flappers offer an easy and simple installation process. You will not need a lot of time for it. In some cases, you need only five minutes to install a toilet flapper.


You don’t love to buy something that can easily ruin within a short period. So, it is always important to buy a durable product. You can’t replace the toilet flapper very often. So, durability is another characteristic that you need to consider for long-lasting use without any worry.


Warranty is always needed for any kind of product. It not only offers the security to buy a product but also ensures the quality of the product. Most of the high quality toilet flapper offers the warranty facility. The warranty may have five years or more.


All of us can’t buy a new toilet if we find any problem with the current one. It is not a better idea as well. So, we need something magical that can fix our toilet with all the previous performances. The toilet flapper is a magical product that can fix the runny leakage toilet and provide the effective performances that a toilet does.

Hence, a good toilet flapper plays a vital role here. This review highlights all the best toilet flappers of 2021 that can make your life easy and comfortable. You can fix your toilet problem with a water-saving strategy. So pick the preferable one for your toilet following the perfect model of your toilet.

Leave a Comment