Top 6 Best Toilet Fill Valves of 2023 Review

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Feeling annoyed with leaky, noisy or broken toilet fill valve? We guess, “YES”! as you’re here. You know, a leaking toilet-

  • increases water usage
  • waste hundreds of gallons of water every day
  • increases water utility bill that this may result in.


Although there are several reasons for the toilet’s leakage, the commonest one is the faulty toilet fill valve. Hence, you can realize how important it is to replace the defective toilet fill valve or upgrade the old one before it fails.

So, why not have the best toilet fill valve to upgrade or replace the old one to avoid repeated damage?

But the problem is- it’s not so easy to find out the long-lasting and most trouble-free toilet fill valve from hundreds of variations. But we sincerely want to help you. For this, we along our team has invested a significant amount of time in testing and reviewing many products. We also surveyed on consumers and spoke to the industry experts. And finally, we’ve listed 6 toilet fill valve based on test results, consumer review, expert’s opinion and of course, price-quality ratio.

We believe, after reading our review, you’ll be able to pick the right toilet fill valve to meet your needs. We bet!

Top Rated Toilet Fill Valve Reviews

1. TOTO TSU99A.X Universal Fill Valve

TOTO TSU99A.X Universal Fill Valve

If you are really looking for the good toilet valve for solving issues of leaky toilets, then this is an awesome tool. All thanks to the EcoPower technology which enables it to generate hydropower by itself. It is also very effective for controlling the flow of water in the tank. It has no fabric and it features three unique contemporary styles which are traditional, transitional, and contemporary.

The most lucrative part of TOTO TSU99A.X lies in its Hydrotect feature. It stirs the dirt that may pile up in your toilet tank. This allows it to reduce pollution in the most natural way and effectively.

The Toto universal fill valve is quite famous for its adjustable flow rate feature. If you have installed two piece-toilets, it will help to adjust the water flow rate the way you want. It has one of the best flushing mechanisms and will fit most standard toilets.

Overall, it’s a universal fill valve which makes it work for most TOTO toilets

What We Liked

  • Self-generating Hydropower
  • Adjustable height
  • Adjustable flow rate
  • Durable plastic material
  • No fabric

What We Didn’t Like

  • Fluctuating refilling speed
  • Tricky installation process

2. American Standard 7381125-400.0070A Universal Fill Valve

American Standard 7381125-400.0070A Universal Fill Valve

One of the reasons why this model made it on this list is because of its great quality with excellent performance. This toilet fill valve is an amazing model that best fit for many American standard toilets. This universal fill valve is quite expensive compared to its other competitors, but it also packs in impressive number of features into one small unit.

The foremost advantage of this toilet fill valve is in its water control assembly feature. This gives it the ability to save water efficiently. The water connection point is made of brass which allows it to join flawlessly without cross threading. This completely removes any possibility of leakage in your toilet system.

Undoubtedly, this American Standard- Universal Fill Valve is highly reliable. Other than being made of plastic which makes it corrosion-resistant. It comes with replacement parts and other features including refill tube, coupling washer, shank washer, lock and coupling nuts.

American Standard is notable for designing high quality daily living products with a long history of manufacturing success. Overall, if you lead a busy lifestyle, this product will work better every day.

What We Liked

  • Dependable adjustment technique
  • Brass water control assembly feature
  • 400A replacement toilet fill valve
  • Lock and coupling units for superior tightening
  • Universal fill
  • Comes with replacement parts

What We Didn’t Like

  • Small hose diameter, hence longer refill time
  • Only compatible with American Standard toilets
  • Difficult water level adjustment

3. Best Replacement Toilet Fill Valve for All Kohler Class Five Toilets

Best Replacement Toilet Fill Valve for All Kohler Class Five Toilets

It’s no secret that Kohler super quality toilet and best toilet valve replacement kit are a popular choice among most buyers today. Their products are not only excellent but also extremely practical. And KOHLER fill valve kit genuine part GP1083167 is no different.

First of all, this is one of the top-rated toilet repair kit, known for its high-performance filling capacity. Its construction features strong plastic and rubber materials that won’t corrode or damage easily. Although it has a universal market, it is not compatible with most other toilet systems except Kohler toilets.

The most charming fact about the Kohler fill valve kit is you can use it on class five toilets. This means if you use a Kohler or class five toilets, its valve is fully adjustable to fit them perfectly. Another beneficial feature of this valve kit is that it fills the water smoothly and extra fast. This helps in reducing water filling time in the tank. Installing the valve kit is pretty much easy and straightforward.

Make no mistake about it! When buying, you should check the shank color to know the model to pick. If it is grey, pick the GP1138930 model. If it is black, then you should choose the GP1083167

What We Liked

  • Compatible with most Kohler toilers
  • Simple installation
  • High-quality materials
  • Adjustable height
  • Resistant to corrosion
  • Adjustable fill valve

What We Didn’t Like

  • Low compatibility
  • Absence of bottom tank seal



Fluidmaster universal can be depicted as one of the top rated toilet fill valves. The manufacturer has tried to offer the high quality possible with this model. This model will not only surprise you with its water-saving capacity but also with its performance. Not to mention, it’s one of the best quiet toilet fill valves. It has proved to be the perfect solution to fix noisy and running toilets.

You must be impressed with its very fast rate of refilling. It offers greater refill rate which is two times greater than most standard fill valves. This is due to its large turbo port system which helps water to flow into the tank faster. This implies that you wouldn’t always have to wait much when using your flush tank.

A plus point of this model is it comes with adjustable roller clamps. With the roller clamp, you can adjust the floatation device on the valve. The height to which you raise the floatation device determines where the water will rise to. Hence, you can adjust the quantity of water that will be filled with the tanks.

It comes with plastic construction; hence, it is relatively noncorrosive. It has a height adjustability feature between 10-15 inches. And finally, it’s universally compatible even with Kohler, Toto and American Standard.

What We Liked

  • 2 times higher refill rate
  • Efficient toilet performance
  • Easy-to-install PerforMAX design
  • Quick refill rate
  • Adjustable height between 10”-15”
  • Very silent operation
  • Very affordable price tag

What We Didn’t Like

  • Tricky installation process
  • Not the best toilet fill valve for hard water

5. Kohler Universal Fill Valve Kit Genuine Part GP1138930

Kohler Universal Fill Valve Kit Genuine Part GP1138930

Surprisingly, this is our second inclusion from the manufacturer KOHLER. And this is not only because of the reputation of the brand but also for some unique features it offers. Although it looks similar to the GP1083167 model, it has some differences. The major difference is that this model has a lower fill than the other.

This fill valve let you can control the amount of water in the tank. Simply turn its adjustment screw clockwise to raise the float ball. The height to which the float ball reaches determines the maximum water level in the tank after when filled.

The chemical resistant construction of this product ensures durability. It comes with durable plastic parts. This, therefore, makes its resistance to corrosion and easy breakdown. All in all, This KOHLER UNIVERSAL FILL VALVE KIT GENUINE PART GP1138930is well worth every penny!

Not to forget!

Cap color may vary. Confirm the part number to make sure it’ll fit your toilet.

What We Liked

  • Ease of installation
  • Perfect for two-piece toilet
  • Able to fit efficiently with Kohler class five toilets
  • Can be adjusted from 8 to 12.5 inches
  • Adjustable fill valve

What We Didn’t Like

  • Doesn’t come with bottom tank seal
  • Instructions are not very helpful

6. FLUIDMASTER 400AKRP10 Universal Flush Valve

FLUIDMASTER 400AKRP10 Universal Flush Valve

We’ve finally reached the last fill valve on our top 6 list, and we’re proud to say that we saved the another top quality product for last. Aside from having more features than all the previous units you have seen, the FLUIDMASTER 400AKRP10 is also highly durable and fit very well for 2-inches flush valve toilets.

This amazing product has an all-in-one functionality. It is one of the best toilet repair kit, ideal for 1.6 gallons per flush toilets. It works perfectly with 2 and 3-bolt tanks produced in the last 30 years.

FLUIDMA STER 400 AKRP 10 has employed Per for max 2″ water saving flapper dials technology. This Per for MAX 2-inches flapper helps to adjust and maximize water usage anytime you flush. This toilet fill valve also adjusts between 9-14 inches and would fit very well for 2-inches flush valve toilets. This feature along with its essential plastic build up would ensure a long lasting period of use.

One more merit of choosing this toilet fill valve is in its overall super performance. This is due to its amazing features which include a replacement toilet handle, toilet flush valve, and tank to bowl gasket.

What We Liked

  • Adjustable water saving capacity
  • Comes with code approved replacement parts
  • Fits 2 and 3-bolt tanks
  • Easy to install with simple instructions
  • Flapper dials

What We Didn’t Like

  • Flapper chain is prone to corrosion.

How to Choose the Toilet Fill Valve

Best Toilet Fill Valve

We know that choosing the best toilet tank fill valve kit might be quite tricky. With the market full of varieties of fill valve systems, how do you get the best?

Well, the following factors would provide a solution to this question and help you make your right purchase

  • Internal Build Materials

Should I avoid the metal construction?

Of course, metal is durable, but it is also very corrosive. Corrosion is the key factor that leads to damage of most toilet fill valves. Therefore, you should stay away from toilet fill valves that contain too much metal parts. The best ones are essentially made from plastics, rubbers, and other durable materials.

  • Adjustability

How will I find the quality fit fill valve?

At times, knowing the perfect size of the best toilet tank fill valve for your toilet might be quite difficult. Thanks to the toilet fill valves that are adjustable. So, you don’t have to worry further. When making your purchase, ensure to buy the one that you can easily adjust to fit your toilet.

  • Ease of Installation

Will I need to hire someone to install a fill valve?

A good way of saving the cost of hiring someone for installation is to buy a model that is easy to install. Such models usually come with everything you need to set them up. These are the easy models and are the ones you should buy from.

  • Anti-Siphon Capability

Is it important?

This feature may not be common but it is also a factor you should consider. This feature helps to ensure that water is flowing only in one direction. This would, therefore, help to maintain the cleanliness of the water supplied to the tank. It would be a huge plus if your toilet fill valve has this and would make life easier.

Damaged Fill Valve? What are the Reasons That Result To

Glad you asked. Here are the reasons that result in the damaged fill valve.

  • Slow refilling

When this happens, little water comes out when you flush. This is because your fill valve does not refill quickly enough with the amount of water you need to flush. Then you need a replacement.

  • Noisy Toilet

Noise coming out of your toilet tank is a possible signal that the fill valve needs replacement.

  • Tanks Fail to Refill

If your tank sounds as if it is refilling and it’s never stopped, it possibly means something is wrong. Consider opening to check the fill valve. If it is faulty and the problem persists, then you may want to get a replacement. Without replacing it, you wouldn’t be able to flush again.

  • Leaking Toilet

This one may be the most problematic issue. It can affect a lot if not taken care of immediately. If you discover any leaking from your toilet, check and fix it quickly. Failure to deal with it fast can affect your water bill.

So, what to do?

Well, if any of the above happens to your toilet, first is to open and check the tank. As soon as you notice a faulty toilet fill valve, it is perfect to replace it immediately. It will be of huge benefit sooner or later.

Final Verdict

Getting the best-rated toilet fill valve from the market is always difficult. But we hope our top 6 best toilet water fill valve reviews will help you to cross that hurdle.

One of the things you shouldn’t compromise is the need to buy quality. That is why our buying guide and reviews are meant to help you make the best decision.

All of the above-listed fill valves are definitely rated well in their respect. They work great and are suitable for a broad range of toilet. So, you can entirely lay your trust on these 6 products as they won’t leave you disheartened.

So, grab the best toilet fill valve that will meet your needs best and enjoy your bathroom time without any annoyance!!