10 Best Toilet Fill Valve You Didn’t Know Exist in 2023!

If you are looking for the best toilet fill valve, look no further!

In this article, we will discuss the top three valves on the market and provide a review for each. We will also provide a buyer’s guide to help you choose the right valve for your needs.

toilet fill valve

So, whether you are looking to replace an old fill valve or are just starting your search, read on for the best information available!

Fluidmaster 400H-002 Performax Universal Toilet Fill ValveSize: 3.35in. x 4.33in x 13.19in. Weight: 9.1 oz. Adjustment height: 9in. – 14in. Material: Plastic Editor’s rating: 4.8
Hibbent ‎TFV1820PUS Adjustable Universal Toilet Fill ValveSize: 9.88in. x 3.82in. x 2.72in. Weight: 12.3 oz. Adjustment height: 7.8in – 13in. Material: Plastic Editor’s rating: 4.7
Kohler Genuine Part Gp1083167 Silent Fill ValveSize: 12.5in. x 3.5in. x 3in. Weight: 9.6 oz. Adjustment height: 9in – 14in. Material: Plastic Editor’s rating: 4.7
Korky 528 Universal Toilet Fill ValveSize: 4in. x 2.25in. x 7.75in. Weight: 9.6 oz. Adjustment height: 7.75in. – 13.5in. Material: Plastic and metal Editor’s rating: 4.6
Danco HC660 Toilet Fill Valve Repair KitSize: ‎10.5in. x 3in. x 3in. Weight: 12 oz. Adjustment height: 11in. – 13.8in. Material: Acetal, Polypropylene Editor’s rating: 4.5

Top 7 Toilet Fill Valves I Personally Recommend:

Here are the toilet fill valves that I’ve picked after extensive research on different types, sizes, and brands of fill valves.

1. The Best Quiet-Flushing Fill Valve: Fluidmaster 400H-002 Performax

“An affordable, easy-to-install plastic toilet fill valve with noiseless, two-times fill feature for a comfortable silent toilet.”

Why did we pick this?

There are so many reasons why we picked the Fluidmaster 400H-002 Performax. It’s budget-friendly, very popular, powerful, and compatible with most toilet brands.

More so, this valve activates and fills faster than most other fill valves and efficiently controls water usage.

Who It’s For?

The Fluidmaster 400H-002 Performax is best for those who want a silent toilet environment. Being water economical, this easy-to-install valve will appeal to anyone who wants to save costs on water bills.

Detailed Review

The Fluidmaster 400H-002 Performax is a performance toilet fill valve with an improvement over the Fluidmaster 400A and Fluidmaster 400CRP14.

The Fluidmaster 400A and 400CRP14 have adjustment knobs to control the fill time and the tank’s water level. However, the 400H-002 has an additional adjustment knob for controlling how much water the toilet bowl should contain. You can adjust the knob to allow less/more water into the bowl without affecting the tank’s water level. Isn’t this amazing?

This amazing feature helps newer toilets that use 1.28 GPF (gallon per flush) or less to flush efficiently. This powerful fill valve also fixes slow tank filling – thanks to its 2X bowl refill capacity. Its height can be adjusted from 9 in. to 14 in. to fit more toilet tanks.

We find the Fluidmaster 400H-002 a perfect replacement for noisy, damaged fill valves. It will fit almost all modern toilets.

For ease of installation, the fill valve comes with necessary accessories and an instruction manual. Make sure that you read the instructions carefully and follow them closely for flawless installation.

To prove its amazing performance, this valve comes with a 7-year warranty.


  • Water-economical with water-saving adjustment dials
  • Adjustable valve shank design
  • Universal fit – it fits most toilets
  • Designed for quiet refilling
  • Comes with a 7-year warranty
  • It’s easy to install


  • Non-adjustable flow rate
  • The rubber washer seems cheap

2. Best For Tool-Free Installation: Hibbent ‎TFV1820PUS

“I found this fill valve pretty easy to install. Its compact size makes installation a breeze. The noiseless refilling, universality, and adjustable water level make it a high-performance fill valve for any modern toilet.”

Why did We pick?

This fill valve comes with a unique design that differentiates it from all other fill valves out there. It also features an easy-to-clean internal filter that keeps impurity out of the valve.

The low-noise operation and water conservation are other reasons why we picked this product.

Who It’s For?

This fill valve is perfect for those who want to maximize their toilet’s performance and conserve water. Those who want a more silent toilet refilling will also love this toilet fill valve.

Detailed Review

Here is another powerful performance toilet fill valve with a unique design that looks so different from others.

Just like the Fluidmaster 400H-002 Performax, the Hibbent ‎TFV1820PUS fill valve is designed to refill the tank with low noise. It also features an inbuilt filter that improves the flow of water into the toilet. This means that you can worry less about debris clogging the fill valve.

This valve is easy to adjust with adjustment height ranging from 7.8in. to 13in., making it a universal fill valve. It will easily fit any toilet brand including popular brands like Kohler, American Standard, and Toto toilets. This valve also allows you to adjust the tank’s water level from 4.7in. to 10.2in.

The Hibbent ‎TFV1820PUS provides maximum performance while saving water usage. If you need a reliable replacement kit for your malfunctioning, leaky, or worn-out fill valve, this product is worth considering.

Besides being pricey, another shortcoming is that the Hibbent ‎TFV1820PUS doesn’t come with a hose clip that secures the fill tube to the overflow. So, you would need to use the hose clip from your old fill valve.


  • Lots of adjustability from 7.8in – 13in
  • Universal fit – designed to work in most toilet tanks
  • Refills tank very quietly
  • It saves water
  • It features an internal filter that filters out sediment


  • More expensive than other fill valves
  • It doesn’t come with a clip to secure the fill tube to the overflow

3. Best Adjustable: Kohler Genuine Part Gp1083167

“A budget-friendly toilet fill valve for Kohler toilets with silent filling and adjustable height. It works great even without calling a plumber.”

Why did we pick?

Kohler Gp1083167 replacement kit is an OEM Kohler part designed for silent and smooth operations in all Kohler class-5 toilets. It comes with all necessary parts, such as a fill hose, valves, inserts, and assembly hardware.

Who It’s For?

Kohler Gp1083167 replacement kit is for anyone with the Kohler class-5 toilets. It’s suitable for those who want noiseless refilling and wants to save a lot of water.

Detailed Review

Kohler Gp1083167 is an extremely adjustable fill valve that’s compatible with a wide range of Kohler toilets, mostly Kohler class-5 toilets.

More so, it’s made of heavy-duty and high-quality plastic and won’t deteriorate over time. Kohler Gp1083167 doesn’t only refill the toilet tank quietly but also quickly.

This fill valve comes with all necessary components, such as a locknut, washer, and clip in the package. This will save you unnecessary spending during installation. It’s important to note that Kohler Gp1083167 is very similar to the Kohler Gp1138930 fill valve.

However, Kohler Gp1083167 has a black shank and is specially designed for Kohler class-5 toilets. Whereas, Kohler Gp1138930 has a grey shank and is made for older and low-profile toilets. Kohler Gp1083167 is also very similar to the Fluidmaster 400H-002 PerforMAX fill valve except for the branding.

If you’re using the newer class-5 Kohler toilets, then this Kohler Gp1083167 fill valve I best for you.

You’ll appreciate the multiple fill rate inserts for optimizing performance and conserving water.

Being an OEM Kohler part, this fill valve works flawlessly but is slightly pricier than most other third-party fill valves.


  • Made by a trusted brand – OEM Kohler part
  • The valve height is highly adjustable
  • Has low water inlet hole to save a lot of water
  • It’s designed for quiet operation
  • Fits a wide range of Kohler toilets
  • It’s very easy to install


  • It doesn’t come with any installation tools
  • It’s not a universal fill valve

4. Korky 528 Toilet Fill Valve (Best Quick Installation)

“Korky 528 has an innovative design that works great. It’s very easy to install and the price is also very affordable.”

Why did we pick?

Korky 528 comes at a very reasonable price, making it the most affordable fill valve on our list. Despite the low price, this fill valve doesn’t compromise its great performance and functionality. The inbuilt anti-siphon feature also makes this product preferable over other fill valves.

Who It’s For?

Korky 528 is for anyone who wants a quieter toilet. It’s also suitable for those that want to cut down their water bill. This is because Korky 528 uses 1.6 gallons of water or less for flushing.

Detailed Review

Just like the Hibbent ‎TFV1820PUS, this fill valve also comes with an internal float system located within the shank. This new technology is an improvement over conventional toilet fill valves with a lengthy refilling process.

Korky 528 is specially designed to fit in low-flow 1- or 2-piece toilets. It uses less water per flush – about 1.6 gallons or less. This fill valve will help you in reducing and managing your water consumption. Korky 528 is a durable and long-lasting fill valve that won’t leak.

This fill valve is pretty easy to install and use. It can be simply adjusted from 7.75in. to 13.5in to fit in different toilets – that’s a great adjustability range. Korky 528 is a flexible and versatile replacement for a leaky, old, or worn-out fill valve.

This product comes with a 5-year warranty and is worth trying. It’s not advisable to use this product in freezing cold water.


  • It features a unique internal float system
  • Compatible with most toilet brands
  • It can be easily installed
  • It comes with durable components
  • It has an innovative twist-lock adjustment
  • Very silent operation
  • It’s very affordable


  • Not suitable for use in extremely cold water
  • The locking plastic can shatter too easily

5. Danco HC660 Toilet Fill Valve Repair Kit

“A highly customizable valve with an outstanding design and excellent performance. It doesn’t only work consistently but its settings are also very accurate.”

Why did we pick?

We included Danco HC660 into our list because of its leak-detecting ability. It gives off an audible alert once it detects leakages. Any feature we love about Danco HC660 is the self-cleaning jet that keeps your tank clean and void of debris.

Who It’s For?

If you’re looking for an affordable yet powerful fill valve with amazing functionalities, Danco HC660 is your best choice. It’s also recommended for those who love clean toilets.

Detailed Review

Danco HC660 features almost everything you would love in a toilet – easy installation, adjustable water level, and adjustable shank height. You can also adjust the water discharge quantity to your toilet’s water consumption capacity. All of these work together to enable you to save water.

What more? Danco HC660 comes with a smart leak-detection alarm that gives an alert once it detects leaks. This rare technology doesn’t only save water but also prevents any possible problems and increases efficiency.

The self-cleaning jet is another amazing technology that keeps the inside of your toilet tank clean. The jet stirs up the dirt/debris under the toilet tank and flushes them down the toilet bowl.

Danco HC660 is very easy to install without tools. To prevent overtightening the locknut, Danco HC660 comes with a pressure click mechanism that alerts when tightening is enough.

Danco HC660 is made of high-quality acetal and polypropylene, which makes it very durable and long-lasting. I’ve got a Danco HC660 for about three years now and it’s functioning properly.

This fill valve doesn’t only refill fast, it also stops the water supply very precisely. Thanks to the auto-calibration, which aids full flush efficiency.

Danco HC660 is worth trying, it’ll fit most toilet tanks as the height can be adjusted from 11in. to 13.8in.


  • It’s relatively affordable
  • Features a self-cleaning jet
  • Comes with a smart leak-detecting technology to save water
  • Full flush efficiency
  • Easy and tool-free installation
  • Features and adjustable height


  • Refilling can be a bit noisy

6. Best Universal: TOTO TSU99A.X

“TOTO TSU99A.X fill valve is one of our favorites. It’s a high-quality and highly durable flush valve with a Hydrotect feature. We love the quick installation.”

Why did we pick?

TOTO TSU99A.X stands out for its hydrotect and self-generating hydropower. It comes with features and components that make it the best universal toilet fill valve out there.

Who It’s For?

This toilet fill valve is specially designed to fit all TOTO toilets and other two-piece toilets models. It’s also recommended for those that want to bring their toilet back to optimal performance.

Detailed Review

The TOTO TSU99A.X is a great performer in the world of toilet fill valves. This fill valve is a perfect fit for any TOTO toilet tank. It also works well on other toilet models – thanks to its universal 7/8in—inlet connection. The adjustable height makes it possible for this valve to fit different tank heights.

This fill valve is very sensitive. Water flows in once the tank is empty and water stops flowing once the required water level has been reached. With TOTO TSU99A.X, there’s nothing like incomplete refilling, dripping, or overflowing. The TOTO TSU99A.X also features Hydrotect coating that naturally reduces pollution.

This fill valve is very easy to install. For guidance, there is a detailed instruction manual in the pack. Installing TOTO TSU99A.X can never be difficult as long as you follow the instructions carefully.

Do you have a TOTO toilet and need a high-quality fill valve? This product is your best option. Buy one today and enjoy the one-year warranty. Though it’s the most expensive fill valve on our list, it’s worth it due to its unmatched optimal performance.

If you’re so concerned about the price, try Korky 528, it’s a replica of this TOTO TSU99A.X fill valve. Korky 528 is much cheaper, works similarly, and also comes with a four-year warranty.


  • Features an adjustable height
  • Can be easily installed
  • It’s compatible with all TOTO toilets
  • Features hydrotect technology to reduce pollution
  • Features self-generating hydropower


  • It’s relatively expensive
  • It’s ideal only for TOTO toilets

7. WDI B3260 Universal Fill Valve

 “Best toilet valve for the money. I’ve been using it for the past three years and it’s still holding up a lot better.”

Why did we pick?

We picked this fill valve because of its minimal size that can easily fit small toilet tanks. WDI B3260 also operates with two pressure settings – low and high – ranging from 15 to 120 PSI for quick refilling.

Who It’s For?

This toilet fill valve is suitable for small toilet tanks and will work in older and modern toilets tank. It’ll also serve those with a hard water supply that want to replace their slow and noisy fill valve.

Detailed Review

The small size and extremely adjustable length make WDI B3260 a perfect replacement for your old and damaged fill valves. WDI B3260 can adjust from 8.25in. to 12.25in to fit most popular fill valves like Kohler, American Standard, TOTO, and so on.

This fill valve features a self-cleaning design that makes it suitable for those with a hard water supply. The self-cleaning design makes this fill valve resistant to mineral deposits and sediment in hard water. Even without any prior plumbing skills, you should be able to install WDI B3260 easily within five to 5 minutes.

Depending on how fast you want the fill valve to fill your tank, you can adjust the pressure settings from 15 to 120 PSI. When properly inserted, this fill valve will offer a noiseless tank refill, fill your tank faster, and prevent water wastage. Otherwise, it will let out a very noisy refill.

WDI B3260 comes with a five-year warranty. This gives you enough time to try out this nice and quiet fill valve in your toilet.


Our biggest complaint about this valve is that it never seems to seal all the way. After the tank fills, we could still hear water trickling through the valve. It might not be much water, but over time, that’s adding up to a lot of wasted water.


  • Fully adjustable shank from 8.25in. to 12.25in.
  • Very easy to install
  • Universal design – will fit most modern toilets
  • Refills tank quicker
  • Long lifespan due to its simple design
  • Can fit easily into a small, shallow, or large toilet tank


  • Can be noisy if installed incorrectly
  • Doesn’t seal properly all the way

How to Pick the Right Toilet Fill Valve?

When shopping for a toilet fill valve, it is important to consider the following factors:

  • Type of valve
  • Size of the valve
  • Material of the valve
  • Features of the valve
  • Noise it makes

Type of Valve

There are three main types of toilet fill valves: diaphragm valves, flapper valves, and piston valves.

Diaphragm valves are the most common type of fill valve and are available in both manual and automatic versions. They are easy to install and are reliable and durable. However, they can be noisy when refilling the tank.

Flapper valves are similar to diaphragm valves, but they have a rubber flapper that closes off the tank when the water level drops. This prevents water from continuing to flow into the tank and keeps the noise down. However, they can be prone to leaking if not installed properly.

Piston valves are less common than the other two types and tend to be more expensive. They are very quiet and have a long lifespan, but they can be difficult to install.

Size of Valve

The size of the valve refers to the diameter of the outlet hole on the top of the tank. Most standard toilets use a ⅝” or ¾” valve, but some newer models use a ½” valve.

It is important to measure your tank before purchasing a new valve to make sure you get the right size.

You’ll find some universal fit valves as well that doesn’t require any measurement. Getting any of those will work as well.

Material Used

Toilet fill valves are made from either plastic or metal. Plastic valves are less expensive and easier to install, but they are not as durable as metal valves. Metal valves are more expensive but last longer and are less likely to leak.

However, I recommend going with a plastic valve because of the value they provide compared to the amount you spend.

Noise level Requires Attention

The noise level is an important consideration, especially if you have a small bathroom or live in an apartment. Some valves are very quiet, while others can be quite loud. If noise is a concern for you, be sure to read the reviews before purchasing a valve. 

Features You May Need

Some toilet fill valves include features such as an adjustable water level, a built-in overflow tube, or a backflow preventer. It is important to consider which features are important to you before making a purchase.

Final Words

There are many factors to consider when shopping for a toilet fill valve. However, by taking the time to do your research, you can be sure to find the best valve for your needs.

We hope this article has been helpful in your search for the perfect toilet fill valve!

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