Best Toilet Flush Valve – The Guidance on Purchase

Best Toilet Flush Valve 2020 – The Guidance on Purchase

High-quality and durable valves will save you from problems with the toilet!

The flush valve of a toilet is a device, which monitors the water level in the toilet tank and provides water start at the time of flushing, and then stops the flow after filling the tank. This appliance allows you to fill the tank with water to required level. The flush valve uses a floater that determines when to turn on and off water.

The toilet valve is the main detail of the tank. There are different types of flush valves, but they all work in the same way.

Each person, probably, at least once the valve broke and there were water leaks, what made you to remove a tank cover to see how to correct the malfunction.

Word of advice – if the valve is broken, better not to fix it and replace a new one, as it is more reliable and it will last much longer.

The main advantage of flush valves – they are cheap and everybody can afford to buy it!

Top-5 best toilet fill valves

  • Fluidmaster 400AH PerforMAX Universal Toilet Fill Valve.
  • Kohler Genuine Fill Valve Kit.
  • TOTO TSU99A.X Universal Fill Valve.
  • American Standard Universal Fill Valve.
  • Plumbcraft Adjustable Quick Shut Off Perfect Flush Anti-Siphon Toilet Fill Valve.

Overview and comparison of the top 5 toilet fill valves 2020

Picture Product Name Main characteristics Amazon Price
Fluidmaster 400AH PerforMAX Universal Toilet Fill Valve Fluidmaster 400AH PerforMAX Universal Toilet Fill Valve High efficiency toilets (HET 1.28 gal.).
Dual Flush including DUO FLUSH.
1.6 gallon toilets with 2″ and 3″ flush valves (1994 & newer).
Older high gallon toilets with 2″ Flush valve (1994 & older).
Height adjusts easily between 10 – 15 in.
7 year warranty.
Check Price
Kohler Genuine Fill Valve Kit Kohler Genuine Fill Valve Kit Material: Plastic.
Size: 12.5*3.5*3 in.
Genuine KOHLER part.
Black finish.
1/4 in. outlet size.
One year limited warranty.
Check Price
TOTO TSU99A.X Universal Fill Valve TOTO TSU99A.X Universal Fill Valve Genuine TOTO adjustable universal fill valve assembly.
Adjustable height and flow rate will accommodate most TOTO toilets.
Dedicated to the future of universal design products.
Check Price
American Standard Universal Fill Valve American Standard Universal Fill Valve Includes valve, shank washer, lock and coupling nuts.
Includes coupling washer, refill tube and refill tube clip.
Check Price
Plumbcraft Adjustable Quick Shut Off Perfect Flush Anti-Siphon Toilet Fill Valve Plumbcraft Adjustable Quick Shut Off Perfect Flush Anti-Siphon Toilet Fill Valve Includes quick action water shut-off that prevents toilets from continuously running.
Adjustable toilet fill valve from 8″ to 13″.
Fits most toilets. Easy installation. Toilet repair kit also includes flush valve and refill tube.
Check Price

1. Fluidmaster 400AH PerforMAX Universal Toilet Fill Valve

This is inexpensive, but very durable and reliable flush mechanism, which fills the tank with water quickly and quietly. The detail is easy to install and works without outages.

It is universal and suitable for most models of toilets. The height of the device is adjustable from 10 to 15 inches.

The valve also has an adjustable roller clamp that controls water use. Fluidmaster is the number-one brand of components for toilets in the world. The amount of details Fluidmaster, installed in toilets, surpasses all other brands taken together.

As the customers’ first choice and preferred supplier of toilet details, Fluidmaster carefully designs internal toilet flushing mechanisms for more than a half-century.


Very easy in installation, durable and offer a smooth operation.

2. Kohler Genuine Fill Valve Kit

Kohler Genuine Valve Kit is known in the market because of its high quality and durability. This adjustable flush valve can be used in various toilets and not only Kohler. The size of toilet sleeve also fits to most toilets.

The valve set is made mostly from plastic. The necessary locknut and clamp are included. Installation process is very simple, and the durability of the product made it one of the best in the market.

This is one of the most reliable flush valves of universal fitting, so it will apply to a majority of toilet models.

The valve is very durable and guaranteed will work for many years.

The height of the valve is adjustable and provides a smooth water drain.


Low price, simple installation, great performance without breaks.

3. TOTO TSU99A.X Universal Fill Valve

Universal flush valve TOTO TSU99A.X is one of the best available in the market. This is a perfect solution for problems with toilet flushing.

It is mainly intended to two-piece toilets, but it can be used for toilets of any types and brands.

This flush valve from TOTO comes in a universal size and is fine for any standard toilet. It is able to use water cost-effectively.

Different types of constructions are available. Design solutions TOTO include a unique traditional, transitional and modern style. For two-piece toilets you can set up water use according to your requirements. You can also regulate the height.

It is very durable and will fit with the most toilet models.

The valve is easy to assemble and install in the toilet.


Durable design, fits most toilets, affordable price.

4. American Standard Universal Fill Valve

This flush valve with standard principle of work guarantees durability and excellent performance.

The valve included all necessary components – the control unit for water, shank, lock, tube for filling, clamping ring and connecting nuts, which you will be able to compile and after to install without professional help.

The valve is very reliable. American Standard is a well-known and time-honored manufacturer of plumbing goods that make life healthier, safer, easier and more beautiful.

The manufacturer offers an excellent assortment of goods for bathrooms and toilets, as well as any spare parts for them.


Nice look, easy assembly, and maintenance.

5. Plumbcraft Adjustable Quick Shut Off Perfect Flush Anti-Siphon Toilet Fill Valve

This is one of the best kits for repair of toilet that everyone should have at home.

This universal kit will help replace the old broken toilet valve. It is simple and costs quite inexpensive, besides you will not need plumber services, because you will be able to make repair yourself!

The kit includes a flush valve, plug, hydraulic closure, gasket and lock nut, which are easily assembled.

Purchasing the kit will result in savings money and time, which you would have spent on renovation of the old toilet flush valve.


Affordable price, allows to repair toilet within a few minutes.

Some bits of advice on which toilet flush valve to choose

We do not think about the importance of the toilet, but it is an important part of our everyday life. To keep the toilet from leaking, and the water intake system worked properly, you should have a quality flush valve that matches your type of toilet.

Before purchasing a flush valve, you need to consider some important parameters that determine which model must be purchased:

  • Measure the hole in the tank cover where the button is located. Standard diameter of sold kits is 16 – 50 mm.
  • Measure the height of the tank using roulette.
  • Theoretically, the diameter of toilet outlet should be 60 mm. This is often a standard, but you still need to check the diameter of the outlet.
  • Before you buy a flush valve, you need to check where is your water drain lever or button – on the side or on top of the tank.
  • You also need to make sure, on which side is water feed in your toilet – underneath or on the side.

You can choose one- or two-button mechanism. Their difference is that two-button mechanisms are designed for two regimes of water flush – economical and standard.

Which flush valve for the toilet to buy?

Buy the model depending on the features of your toilet. All presented models are high-quality, credible, reliable and have a substantial number of positive customer comments.

Do not be afraid to spend more money on the toilet flush valve as it is a really important detail for your comfort. Furthermore, use it carefully, even though the mechanism is very durable.

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