9 Best Toilet Flush Valves – Suitable Options For Your Toilet

Fed up with the poor quality of valves that waste a ridiculous amount of water? Or are you tired of the overall horrid performance of your flush valve? Then, you are in the right place. Today, we are going to be reviewing the nine best toilet flush valves on the market. A poor flush valve can wreak serious havoc on your water bills. Plus, if you are environmentally conscious, a lousy quality valve can turn your life into a nightmare.

Let’s face real facts; the bathroom is one of the most critical places in a home, which means that every bathroom component should be of the best quality, including the toilet flush valve. This component is responsible for holding and discharging water when you flush, and it also regulates the amount of water you use and helps to fill up the tank quicker.

The New York City Environmental Protection reported that about five gallons of water flow through the valve of a flush per minute. So, if you have a faulty valve, you might waste thousands of gallons every year. From an efficient flush system, conservative water use to minimal noise, there are numerous benefits of a top-quality toilet flush valve. So, you deserve to have the best toilet flush valve in your bathroom.

You should continue reading this review as a guide to the best toilet flush valves, and make your choice quickly before the next exorbitant water bill comes in.

Overview table

Buying the best toilet flush valve might not be as easy as it sounds due to the surplus of products and brands on the online and local markets. Is it water economical? Does it produce noise? Or leak water? All these are some of the questions you have to ask when going through the dozens of options on the market currently. This guide will help you to sort the excellent toilet valve models from the average quality valves so you can easily select the very possible best available. We aim to help you purchase a valve that suits your needs, saves you water and money, and makes less noise.

As such, we have reviewed the top best toilet flush valves on the market. We spent time researching and reviewing these valves in detail, examining their features, pros, cons, as well as top reviews from industry experts and users, all in a bid to help you make a perfect choice. The result is our pick of the nine most recommended toilet flush valves currently on the market, highlighted below. These nine valves are renowned for their quality, durability, and reliability.

Instead of exploring tons of valves, all you have to do is compare nine best flappers and then choose one ideal option. You’ll also find a buyer’s guide after the reviews, as well as answers to some frequently asked questions.

This overview underscored the highpoints of each selected model.


Editor choice 1 American Standard 3174.105-0070A
American Standard 3174.105-0070A
(Best Toilet Flush Valve for Champion Line)

With its reengineered design, the American Standard flush valve offers valve durability, super-quiet operation, and improved toilet performance.

2 Kohler Gp1083167
Kohler Gp1083167
(Best Flush Valve for All Kohler Class Five Toilets)

This Kohler valve gives users a superb experience with multiple fill inserts that conserve water and optimize performance.

3 Toto THU129P-3A
Toto THU129P-3A
(Best Toto Toilet Flush Valve)

Renowned for delivering incredible performance and great value. It does a simple job of repairing the faulty valves in your residential or commercial bathroom.

Best seller 4 Next by Danco HYR271T with Handle
Next by Danco HYR271T with Handle
(Best Toilet Dual Flush Valve)

Practical and affordable valve that converts a standard toilet into a dual flush unit. Fits most two-piece toilets.

5 Toto THU338N
Toto THU338N
(Best One-Piece Toilet Flush Valve)

Excellence, efficiency, and sustainability are what this THU338N flush valve offers its users. It is an ideal assembly kit for one-piece dual flush toilets.

Best value 6 Plumb Pak Keeney K835-12
Plumb Pak Keeney K835-12
(Best Toilet Flush Valve System)

The valve from the Keeney brand is highly rated for its water-saving feature, which conserves up to 2,500 gallons of water annually.

7 Fluidmaster 540AKRP5
Fluidmaster 540AKRP5
(Best Toilet Flush Valve Repair Kit)

Meeting the OEM specifications, this Fluidmaster 540AKRP5 valve offers an exceptional combination of quality, longevity, and affordability.

8 Plumb Pak K835-9 3X2
Plumb Pak K835-9 3X2
(Best Budget Toilet Flush Valve)

This valve offers straightforward installation, water conservation, and top performance. Using it you can save up on water bills.

Best price 9 LASCO Mansfield 211
LASCO Mansfield 211
(Best Low Flow Toilet Flush Valve)

Last but not least is the LASCO Mansfield 211 is a 2-inch flush valve that lasts for a long time without corroding or rusting.



1 Editor choice

American Standard 3174.105-0070A – Best Toilet Flush Valve for Champion Line


  • Replacement flush valve for Champion 4 systems
  • 3.4” metal chain
  • 7-inch tube
  • Plastic material
  • American Standard OEM valve

The American Standard Champion flush valve is a superb product and its super quiet operation highlights its uniqueness to users. It features a re-engineered design that improves toilet performance and valve durability. Even more, it comes with a universal height, meaning that it can be easily adjusted to fit any size and tank – just modify its height and you can install it with any toilet in the American Champion line.

We also understand that consumers complain about how hard it is to install some flush valves. However, this Champion model, as its name suggests, is truly exceptional. Its installation is incredibly straightforward – all you have to do is read the instructions in the manual and carefully follow the steps. Regardless of whether you are a plumbing novice or expert, you can install this valve properly in less than fifteen minutes. What’s more, this model adheres to the American and OEM standards of replacement parts.

Even more impressive, the water tank maintains several inches of flushing water inside it when you flush, and this improves flush pressure. What this means is that, unlike low-quality valves that often empty out water in the tank, this unit leaves some water. Thanks to this feature, you can save water within the tank for future use.

  • Highly durable
  • Ideal for use with any two-piece toilets from the Champion line
  • Easy to install
  • Great toilet fill valve for high pressure
  • Quiet operation
  • Universal height
  • It comes with a 1-year limited warranty
  • Not ideal for other toilet brands

Kohler Gp1083167 – Best Flush Valve for All Kohler Class Five Toilets


  • Flush valve for Kohler class 5 toilets
  • Adjustable height
  • Plumbing overstock style
  • Plastic material
  • OEM replacement part

Kohler is another renowned name in the industry of plumbing products. If your current Kohler filler valve has become faulty, then you should replace it with this valve which has a better performance and design. The KOHLER GP1083167 is one of the most popular flush valves on the market as a result of its high quality and durability. Why is it so famous? Well, this Kohler unit offers more quality than its cost, and longevity is guaranteed. Thanks to the adjustable height, the size of this unit is compatible with the majority of Kohler toilets.

We also appreciate that this unit is designed with heavy-duty plastic material which is resistant to both corrosive deposits and bacteria. Besides, you won’t have to spend extra money on items like clips and washer locknut during installation, as they all come included in the package. Also, in the box, you’ll find various components that enable this valve to fit with toilet tanks from Kohler.

Another noteworthy feature of this valve is its extremely low water inlet hole. This helps with the water economy. Plus, the valve comes with several flow restrictors that enable it to meet the flow requirements of almost all toilet tanks.

  • Sleek design
  • Corrosion-resistant
  • Adjustable fill valve
  • Durable construction
  • Water-efficient
  • Comes in various colors
  • The instruction manual can be difficult to understand

Toto THU129P-3A – Best Toto Toilet Flush Valve


  • Flush Valve for Toto toilets
  • Adjustable flow rate
  • Self-generating hydropower
  • Flapper and fill valve included
  • Plastic material

When you’re after performance, quality and water-efficiency in a product, you can’t go wrong with the Toto brand. For over 90 years, Toto has continued to deliver great product quality and customer service for residential and commercial bathrooms, and the Toto THU129P-3A is one of the best flappers on the market. Having to deal with a faulty flush valve can be particularly annoying as it makes it difficult for you, your family and your guests to use the bathroom.

Rather than stressing yourself out by continually getting into the water tank to flush the toilet manually, get this affordable Toto THU129P-3A flush valve replacement kit. This model replaces the THU129P, THU129W-A, and the THU129ZE, and it does a simple job, without requiring you to hire a plumber. This unit is delivered with a detailed instruction manual. By adhering to every step, you’ll find it easy to replace your faulty valve.

The design and construction of this Toto THU129P are done with sophisticated styling and attention to every detail. We should also mention that this unit comes with the Hydrotect and Ecopower feature which enables it to generate hydropower and reduce pollution naturally. Even more, users get the chance to adjust the height of the valve to fit their flush tank. If you have a two-piece toilet installed, you also get the opportunity to regulate water flow to suit your needs.

If you’re already using a Toto toilet, then this model is an ideal flush valve for you. It is engineered to fit Toto flush tanks, so it is not really compatible with other brands. What this means is that it might not perform up to expectations if it is used with other brands.

  • Easy to install
  • Adjustable height
  • Comes with a detailed instruction manual
  • Generates hydropower
  • Comes with a one-year warranty
  • Its price is a bit on the high side
  • Only ideal for TOTO toilets
4 Best seller

Next by Danco HYR271T with Handle – Best Toilet Dual Flush Valve


  • Dual Flush Valve
  • Fits 1.6 to 3.5+ GPF toilets
  • Converts standard two-piece toilets into a dual flush commode
  • Designed for 2” to 2 ½ inches standard toilets
  • Drop-in installation
  • Comes with a lever or push-button handle

Not many names in the business of residential plumbing replacement and repair are more reputable than Danco. The brand focuses on providing practical and affordable home improvement solutions that empower DIY consumers and adds more charm to the home. This Danco Hydroright unit is no exception. It is an innovative and fashionable toilet valve that enables users to handle toilet repairs without employing the services of a plumber.

Imagine purchasing a valve that can convert your conventional toilet into a dual flush commode. That is precisely what you’ll get with this Danco unit. It is equipped with a quick flush setting that uses a significantly low water volume for papers and liquids. For solids, there is a full flush setting that uses the standard water quantity.

Even more exciting, this HYR271T unit is designed for drop-in installation, meaning that you can put it in without using tools or removing the tank. Impressive! It also gets rid of the most prevalent bathroom issues by replacing the chain, handle, and flapper. We should also mention that this valve is constructed with material that is resistant to chlorine chemicals. So, you can be sure that this unit will last for long without bending.

  • Gets rid of common toilet problems such as faulty toilet handle, flapper, and chain
  • Installation is extremely easy and straightforward
  • Durable construction
  • Includes split handle
  • Saves energy and water at the same time
  • Some users have reported an occasional sound from the dual flush system
  • Doesn’t fit Mansfield toilets

Toto THU338N – Best One-Piece Toilet Flush Valve


  • Flush Valve Assembly Kit
  • Weighs 12.6 ounces
  • 2 ½ inches drainage diameter
  • One-piece toilet valve

As we’ve said earlier, the Toto brand has been in the business of creating high-performance and sophisticated design plumbing products for over 90 years. They have continued to evolve with new manufacturing practices and technologies that ensure efficiency, excellence, and sustainability in their plumbing fixtures.

Users particularly appreciate how easy it is to install this Toto flapper. Thanks to its engineering design which is based on advanced innovativeness, this flush valve is reliable and lasts for long. Even more impressive, this unit effectively controls the amount of water for each flush. This allows you to save water and significantly reduces your water bills.

If you have a one-piece toilet where all toilet parts are attached as one, then this Toto THU338N unit is an excellent toilet flush valve for you. Though it can work with other toilet types, it is particularly ideal for one-piece dual flush toilets, and you can trust its superb performance. To compare all the pros and cons check both of our reviews of the Best One-Piece Toilets and the Best Dual Flush Toilets.

  • Superior performance
  • Ideal for one-piece dual flush toilets
  • Quick installation
  • Low maintenance
  • Durable and reliable
  • Not suitable for all commodes
6 Best value

Plumb Pak Keeney K835-12 – Best Toilet Flush Valve System


  • 3-inch flush valve
  • Comes with a flapper opening funnel
  • Adjustable no cut overflow tube
  • Adjustable height
  • Adjustable timing cone
  • Surface-mounted installation method

Turn your poor performance toilet into an efficient commode with this K835-12 toilet flush valve. For over 90 years of delivering elegance to homes, Keeney still offers a high standard of quality at affordable prices. This K835-12 toilet flush valve is one of the most efficient toilet items from the brand’s faucet series. If you have a standard toilet with a 2-inch flush valve, then you can easily install this unit. No special tools are required for this except a wrench, screwdriver, and a sponge and bucket for emptying the toilet tank.

Another super fantastic thing about this flapper is its water-saving feature. This feature helps this unit to save up to 2,500 gallons of water each year and optimizes the flush power of a standard toilet by 40%, making this unit one of the best on the market.

But that’s not all. This superb valve also includes all the required washers and nuts, such as an adjustable flapper, a tank-to-bowl gasket, and tank-to-bowl hardware. One other top merit of this model is its flexible no cut overflow tube. This model will fit Toto, Gerber, Mansfield, Crane, and Jacuzzi toilets. It will also support any flush with a similar 3.16-inch thread size. Fantastic!

  • Saves a lot of water
  • Easy to install
  • Universal toilet height compatibility
  • Impressive flapper
  • Comes with a 1-year limited warranty
  • The gasket is not of the best quality

Fluidmaster 540AKRP5 – Best Toilet Flush Valve Repair Kit


  • 3-inch toilet flush valve and flapper repair kit
  • Meets OEM specifications
  • Comes with nuts, gaskets, and bolts for two-piece toilets
  • Fits Toto, American Standard, and most common 3-inch commodes
  • Adjustable overflow tube

If you want good quality, but you also want to save a few bucks, then you should consider this Fluidmaster 540AKRP5. It offers decent value for the money. This unit is a unique combination of quality, affordability, and longevity. Even more, it is designed in such a way that it can quickly repair leaks between the bowl and the tank.

The installation method is quite straightforward, and it supports Toto, American Standard, and the most common 3-inch toilets. We should also mention that this valve comes with a flapper that adjusts efficiently to optimize performance. Interestingly, this flapper also regulates the quantity of water used in flushing. If you want to learn more about the toilets managing your water consumption, then check our guide – 9 Best Flushing Toilets!

What’s more, this valve is designed with a chlorine-resistant silicone seal. It is thanks to this feature that this unit lasts long. The valve tube doesn’t need to be cut, and it can be set to meet with the OEM standards. Another great advantage of this Fluidmaster unit is that it comes with a 5-year warranty from the manufacturer.

  • Easy to use
  • Straightforward installation
  • Optimized performance
  • Saves water
  • Comes with a 5-year warranty
  • The user manual is not easy to follow

Plumb Pak K835-9 3X2 – Best Budget Toilet Flush Valve


  • 2-inch flush valve
  • 40% better flush
  • Comes with a flapper timing cone
  • Includes gasket and tank to bowl hardware
  • Overflow tube height: 8.5 to 13 inches
  • CUPC approved

This Plumb Pak K835-9 3X2 model is another Keeney toilet flush valve that offers great quality and efficiency for the smaller price. If you have a standard toilet and a faulty valve, then you should consider this unit. It is designed to work with most standard commodes which feature a 2-inch flush valve design.

Among its host of features is a 3-inch flapper opening, which moves down the 2-inch outlet and increases the flushing power by up to 40%. What this means is that this valve enables your commode to efficiently flush down waste using less water. Thanks to this feature, you can save up to 2,500 gallons of flush water annually. In addition, check our review of the best water-saving and environmentally friendly Best Flushing Toilets.

The installation of this unit is super easy. It comes with a video that walks you through the steps for replacing your valve. Similar to the previously reviewed Plumb Pak unit, no special tools are required for installing this unit. You only need a screwdriver, wrench, and a sponge and bucket. What’s more, it comes with a no-cut overflow tube that adjusts the height from 8.5 in. to 13 in. Thanks to this feature, this unit is compatible with toilet tanks with different heights.

  • Saves a lot of water
  • Adjustable height
  • Comes with a one-year warranty
  • Installs easily
  • Increases flushing power
  • Some users reported that the chain connecting the flap to the handle is a bit rigid
9 Best price

LASCO Mansfield 211 – Best Low Flow Toilet Flush Valve


  • 2-inch flush valve
  • Super low flow
  • 1.6 GRF (3.5 GPF option)
  • White plastic
  • Cylindrical shape
  • Comes with 2-inch threaded nut with gasket

The Larsen Supply brand is one of the biggest names in the plumbing industry with over 80 years of experience, and its pride is in delivering the best service, quality, and support. This Mansfield 211 model is a great solution if you are looking for a reliable 2-inch flush valve at an affordable price.

One of the best things about this valve is its ultra-low flow, which regulates water to 1.6 gallons per flush. It is designed to meet non-commercial, standard, and municipal water-saving requirements in home toilets. Users also rated this flush valve high because it works impressively with no leaks. Hence, you can be sure that this unit won’t allow water to flow more than is needed for a flush.

Another feature that stands it out among its competitors is its brass rod handle, which is a bit longer than a standard handle. Users also appreciate that this unit does not corrode or rust even after long use. We also found that this cylindrical-shaped valve is super easy to install and use. It also comes with adjustable height that makes it compatible with various toilet tanks.

  • Great performance
  • Affordable price
  • Easy to install and use
  • It does not corrode easily
  • Comes with a one-year limited warranty
  • Average material quality
  • Some find its flushing a bit weak

Buyer’s Guide

Except you are an experienced toilet owner or a professional plumber, buying the right toilet flush valve is never an easy task. Besides the numerous options on the market, there are some factors that a toilet user must consider to determine the model to opt for.

Here are some of these factors:

Water-Saving Technology

One of the very first factors you should consider when purchasing a flush valve is if it has water-saving technology or not. This is critical because a flapper without this feature will waste a considerable amount of water. Most of the products reviewed in this guide are water-efficient. For instance, the two Plumb Pak units are designed to save up to 2,500 gallons of water annually. The LASCO Mansfield 211 model operates with a 1.6 GPF ultra-low flow. Even more exciting, the Next by Danco Hydroright model converts a standard toilet into a water-efficient dual flush commode. To learn more about the smart flushing options that make your toilet water-efficient read our guide – 9 Best Flushing Toilets!

9 Best Toilet Flush Valves -2


A flush valve cannot fit every toilet. Make sure you check the dimensions and height to ensure that the flapper is compatible with your commode. To remove any doubt, you can select a model with adjustable height like the Kohler Genuine Part GP 1083167 or the Plumb Pak K835-12. However, there are still some valves that more suitable for the brand’s toilets. For instance, Toto THU129P-3A is ideal for only Toto toilets.


Another crucial factor to consider is the construction material of the valve. Choose a model that is designed with durable material. This material should be resistant to corrosion and rust to ensure longevity. This is what obtains in the LASCO Mansfield 211 Flush valve. If your toilet bowl has toxic chemicals, then a chlorine-resistant valve like the Next by Danco HYR271T valve will really come in handy.


Nobody wants to be constantly reminded that someone is using the toilet. This makes noise another essential factor. Most of the valve models reviewed above operate quietly, especially the Kohler Silent Fil Valve and the American Standard 3174.105-0070A Champion valve.


There are two standard flush valve sizes – the 2-inch and the 3-inch. When purchasing any of these two, ensure that it is leak-proof. Even as you install any unit, make sure to tighten it to prevent leaking.


Except you plan on using the services of a professional plumber, you want to make sure that the model is easy to install. Ensure that the toilet flush valve comes with specific instructions or a video tutorial that helps you with the installation. Most of these valves are actually very easy to handle, often not needing any special tools for connection.


Sometimes you just cannot predict the performance and durability of these products, this makes it very important to only buy a model that is backed by a warranty. Just in case anything goes wrong, you can always go back to the manufacturer for either a repair, refund or replacement. All the products reviewed are backed with a warranty. However, the Fluidmaster 540AKRP5 stands out among others for its 5-year warranty.

9 Best Toilet Flush Valves -1


Typically, these valves last for an average of four to five years. However, if you purchase a valve that is not resistant to toxic chemicals like chlorine, then it might not last for a year.

When you start noticing signs such as a noisy toilet, noisy refilling, or that the tank is unable to refill, then your flush valve is faulty. Other symptoms include running or leaking toilets; this immediately spikes up your water bill and shows that you need to change the valve.

Toilet flush valves are available in 2-inch and 3-inch sizes.

First, you have to turn the water inlet off and drain the tank completely. Then dry it with a sponge or vacuum. Remove the water gasket and loosen the lock nut beneath it. This way, the old flush valve will come off easily. You can install the new one in the same way the old valve came out.

Direct the valve through the hole, keeping the thread side up. Adjust the tube height as specified by the manufacturer, attach the gasket, and then use the nut to screw the valve into position. Once you’re done with this, conduct a test on the flapper and check for possible leaks.

The main function of a toilet flush valve is to hold and release the required water quantity into the tank at the same time that you flush the toilet. As soon as the toilet tank becomes empty, the valve closes the drain over and returns to its previous position.

9 Best Toilet Flush Valves


It would help if you install the right valve in your toilet to ensure increased performance, quieter operation, and water conservation. We hope we have been successful enough to make you know the best toilet flush valves on the market currently and what you need to consider before buying one. So, whenever you have to replace your toilet valve, then endeavor to choose the best toilet flush valve which is suitable for your needs. You can never go wrong purchasing any of those valves reviewed above as they stand out for their superior quality and repeated success.

Toto is one of the biggest brands in the industry of plumbing, so it shouldn’t come as a surprise that we have chosen one of their most popular products, the Toto THU129P-3A, as the best toilet flush valve on the market currently. Being adjustable, water economical, eco-friendly, and boasting an ultra-durable construction, you’ll be hard-pressed to find a flush valve that beats this model.

The valve is powerful, quiet, and straightforward to install. Even more, it comes with an Ecopower feature that enables it to generate hydropower and reduce pollution. It is also quite affordable, making it ideal for people on a budget. Give the Toto THU129P-3A flush valve a try, and you won’t regret it!

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