Best Toilet Fill Valves for an Effortless Flushing System

You don’t really think about the fill valve in your toilet unless your toilet suddenly stops flushing one day and you can’t decide whether to call in a plumber or run to the nearest store and replace it yourself!

The good news is replacing your old fill valve is easy. You just need to find out the toilet fill valve from myriads of choices that fits your tank!

Our pro plumbers reviewed today’s top fill valve units so you can easily make your choice!

10 of the Best Toilet Fill Valves Ranked and Reviewed

01 TOTO TSU99A.X (Our Top Choice)

Let’s start from the peak of the Olympus– the TOTO TSU99A.X. Well, we must confess that the name isn’t that attractive, but it definitely is a performer when it comes to the performance! If you ever dealt with toilet flush tank fill valve problems, you must have heard of TOTO and this model represents the brands in a brilliant way.

The valve is simple to install, but once it’s in place, you can just forget about it. It’ll take care of your toilet’s flushing flawlessly day in and day out.

This top rated valve is a universally adjustable, and versatile fill valve. It comes with adjustable height positions so that it can perfectly fit all toilet tanks made by TOTO (and probably many other types as well, but the manufacturer guarantees suitability for their own products).

Therefore, if you have a TOTO toilet tank, don’t worry. Just get this model without a second thought and you’ve solved your problem. Moreover, it will definitely fit your installations, as it comes with the universal, classic inlet connection measuring 7/8 inch.

In addition, one of the strongest assets of this water fill kit is that it enhances the performance of your tank, in all terms. Namely, your tank will re-fill itself in no time. The valve is sensitive, so water will stop pouring as soon as the required amount of water is there. There is no trickling, nor incomplete re-fill problem. Also, you won’t hear that annoying sound anymore!

What do you get in the package? There is the body of the kit, the clamp, and a toilet fill tube, as well as the nut and cone washer. We also want to point out that this model, like all other TOTO products, is very easy to install. You don’t need a handyman – it is a DIY installation process!

Specifications

Pros

• Height is adjustable
• Easy, DIY installation
• Fits all TOTO toilet tank models
• Hydrotect technology reduces pollution
• EcoPower technology self-generates the hydropower

Cons

• Cannot be shipped worldwide, but only within the USA and other selected countries

Final Verdict

Adjustability and universal fittings are the strongest assets of this amazing, versatile, high-quality toilet water control valve. It will solve all your tank re-fill problems. No more water leakage, quick fill toilet valve, an adequate amount of water for your tank type, and no annoying sound!

These were the reasons that made us choose this product as the top on the market.  Sounds good? You can have it all with the universal TOTO TSU99A.X valve which is on our list.

02 Kohler Genuine Part gp1138930 (Top Silent Performer)

KOHLER is a brand existing for more than 150 years. Users trust them for their exceptional quality, good warranties, and superb materials. We tested several KOHLER products and chose the GP1138930 model as a fantastic noiseless performer.

If you are sick and tired of hearing that squeaky and piercing toilet tank filling noise, look no more. Get this silent fill valve and enjoy the silence of your toilet!

Moreover, this kit comes with a very handy feature. There are different fill rates, as it is a versatile and flexible product good for many different types of toilets. Also, it optimizes water consumption.

This product is flexible and versatile from another point of view as well. Namely, you can easily adjust its height. Therefore, it suits various toilet tanks from this brand. All you have to do before buying this product is to check the color on your shank. It can be grey or black. This model is suitable for grey color labeled ones.

Community-based reviews have provided an amazing insight into the longevity of KOHLER toilet tank re-fill valves. The average longevity of these kits, as per the worldwide user report, is 20 years! Moreover, users say that these valves are easy to install, easy to adjust and expand to even 14 inches! You don’t need any special tools, only the regular ones found in any household would do.

We highly recommend this quality model to anyone who owns a KOHLER tank. Also, if you have a re-fill noise problem, just check the compatibility of your tank and inlets with this product and we guarantee that you will be satisfied.

Specifications

Pros

• Adjustable height
• Made from quality materials
• Flexible and versatile product

Cons

• Slightly more expensive than the average valve on the market

Final Verdict

If you are dealing with annoying toilet tank re-fill noises, it is time to finally solve your problem. Get the KOHLER Genuine Part GP1138930 and forget about the toilet noises. This amazing product is adjustable, both in height and expansion. It is a superbly quiet kit that we have tested so far and will suit most KOHLER tanks and some tanks by other manufacturers.

The average lifespan of KOHLER products is 20 years. Therefore, invest some money in this superb product and enjoy the effortless maintenance of your toilet for decades.

03 Fluidmaster 400CRP14 (Top Flapper Repair Kit)

Are you looking for a quality flapper repair kit? Fluidmaster 400CRP14 is a superb choice that we tested. Its key advantages include easy installation, universal design, and adjustability.

Namely, this product will fit most toilet tanks, regardless of the brand. You can adjust so many things about this product, such as height and water flow. It is good for anything between 9 and 14 inches. This is amazing flexibility that any homeowner will appreciate.

Moreover, we liked this product because it will optimize water consumption. Namely, you can pick the water amount settings according to the size of your tank.

Fluidmaster 400CRP14 comes with a 5-year warranty. It is a very good warranty since majority of other similar products come with a 1-year warranty.

In addition, we must point out that this pack does not contain only the kit body, but also the repair kit and a flapper! It is good for repairing running toilets, fixing cracks, and flappers! The flapper is good for 2-inch valves. The kit is very easy to use, with straightforward instructions. You don’t need a handyman. This is a DIY project! It will take you only 10 to 15 minutes for the repair and installation, depending on your skills.

Fluidmaster 400CRP14 is suitable for tanks with 3.5 gallons of water capacity or larger. It solves the noise problem, leakage problem, and incomplete and slow filling problem.

Specifications

Pros

• Simple design for easy installation
• Highly adjustable
• Comes with a 5-year warranty
• Affordable
• Comes with a repair kit

Cons

• Does not comply with the Proposition 65 warning (refers to California)

Final Verdict

If you are looking for a 3-in-1 product – the tank valve, the flapper, and a repair kit, we highly recommend the Fluidmaster 400CRP14. It is an adjustable, durable, and easy to install with a quality flapper and a DIY repair kit. It is good for 3.5-gallon tanks. It is an amazing package coming at a great price point.

04 Korky 528gt

Do you have a TOTO toilet? Are you dealing with tank fill valve issues? If yes, stay with us and consider this amazing product: Korky 528GT. It is an ideal solution for your TOTO  one piece toilet CST 854. It is a great alternative to fight toilet noise problems, running toilet, as well as slow re-fill process. Let’s learn more about this quality product.

First of all, this product is made in the USA. It is compliant with all underground storage tank valve regulation standards. It aims to control and lower your water consumption. Moreover, it is a durable kit that prevents leakage.

In addition, it is very easy to install and handle. Adjusting this toilet float valve is an easy task. Namely, this valve can be adjusted from 7 inches and ¾ of an inch to 13 inches and a half! This is a very good adjustability range. Therefore, we can say that this is a versatile and flexible product that will pay off, even if you decide to change the tank.

The product comes with a 5-year warranty. You will be amazed at the durability of this product. All parts are made in their Wisconsin Factory (recently known for their ventilator manufacturing enterprise) in the USA and are very durable.

Moreover, you will notice that this valve is quieter than any other models you’ve ever used! You will hear absolutely nothing during the water re-filling process.

When it comes to the installation process, no worries. It installed in several minutes thanks to the twist-lock technology. It is an innovative solution for easy and simple adjustments.

To sum up the benefits of this product, we want to emphasize once again that it enhances your toilet tank performance, saves water, suits different types of toilet tanks, doesn’t use ballcocks which often cause problems with your tank, and is very easy to install and use.

The package includes the valve, the flappers, sensors, the refill tube, the clip, nuts, cone washer, as well as the instructions user manual.

Last but not least, you probably wonder what are the brands you can use this valve with? This product suits most tanks, but the manufacturer pointed out that these brands are 100% suitable: TOTO, Ultramax, Drake and Eco Drake. You should buy Korky 528T for G Max and Power Gravity Toilets.

Specifications

Pros

• Made in the US
• Complete package with flappers and other equipment
• Good for noise problems, running toilets, and slow re-fill issues
• Compatible with TOTO, Ultramax, Drake and Eco Drake models

Cons

• Slightly more expensive than its competition

Final Verdict

If you are looking for a top valve for your TOTO toilet and tank, Korky 528GT is the best toilet fill valve you can get. This product is 100% made in the US using quality materials maintaining all valid production standards.

It is easy to install and use. Moreover, it solves the running toilet, slow re-fill, and noise problems. It is highly adjustable, from 7 inches and ¾ to 13 inches and a half. It comes with a 5-year warranty.

05 Fluidmaster 400AH PerforMAX

If you want to buy a valve with long warranty coverage, here’s a spot on deal for you: the Fluidmaster 400AH PerforMAX comes with 7 years of warranty by the manufacturer.

You can set the height between 10 and 15 inches. Moreover, this will solve your noisy fill valve tank problem! This is one of the quietest, yet powerful models on the market.

When it comes to water usage control, this amazing product has it all covered. Namely, it comes with the roller-clamp controls which can be easily adjusted to fit your water consumption needs.

Pay attention to the PerforMAX label in its name. What does it mean? This is not just a fancy trick to make the product name look more attractive. It denotes a smart design system which is responsible for 2x better re-fill rate! At the same time, this valve saves water. You will notice the difference in your water bills.

You probably want to know which toilets are suitable for this fill kit. It is compatible with all TOTO, Kohler, and American Standard toilet models. Also, it is suitable for other models due to adjustable height settings.

Moreover, experts praise this product as it is good for the high-efficiency toilets which consume 1.28 gallons per flush. At the same time, this kit can be used with the older models, such as the 1.6-gallon and 2-inch flush valve models. It is also compatible with dual-flush systems and a good valve for hard water.

Specifications

Pros

• Suitable for HET models
• Good for dual-flush tanks
• Has adjustable height settings
• Has 2x better re-fill rate than its competition

Cons

• Not compliant with Proposition 65 on harmful substances

Final Verdict

This model by Fluidmaster is one of the most reliable toilet fill valves. It comes with 7 years warranty. Also, it doesn’t have any metal parts, so you don’t have to worry about corrosion and the nuisance of a slow filling toilet tank.

In addition, this model is one of the most compatible models on the market. It is good for HET toilets, TOTO, American Standard and KOHLER toilets, as well as Dual-flush tanks.

06 KOHLER GENUINE PART GP1083167

Here’s another great product by KOHLER. This valve is an excellent choice if you want a completely silent performer. You will not hear a thing and the tank will already be full!

It comes with several filling options. Different fill rates are enabled by separate inserts that will help you pick the right amount of water in relation to your tank and needs. This will save both water and your money.

Moreover, we liked this valve because all the adjustments can be made very easily and quickly. Another benefit of this product is endless adjustment possibilities. You can literally adjust the kit to fit any height you need. Therefore, it is suitable for most types of two-piece tanks.

This product is made from durable plastics. It weighs 9.6 ounces. It is made in the USA and according to all tank fill valve standards.

Specifications

Pros

• Made by a trusted brand
• Highly adjustable
• Saves a lot of water

Cons

• Comes without any installation tools

Final Verdict

If you are looking for a silent valve, try KOHLER GENUINE PART GP1083167 model. It is made from durable plastic. It is easy to install for high profile toilets (but doesn’t come with the tools).  If you have low-profile toilets, get Kohler 1068030 Fill Valve for a troubleless flush.

Moreover, this valve will decrease the amount of water you spend per flush. It will serve you for decades. In addition, height is highly adjustable.

07 American Standard 7381.125#400.0070A

If you are looking for a valve that will last for decades, try the American Standard 7381.125#400.0070A model. It is extremely durable, made from quality materials, and marked with quality workmanship.

It comes in a package together with the shank washer, coupling nuts, refill tube, the clip, and the lock. In addition, it is very easy to install. All the bits you need for the installation are provided in the package. It will take only 10 minutes to set everything up.

Even though it is not the cheapest solution, you can be sure that it will pay off. Since it is highly adjustable, you can set the height you want, as well as the width of the inlet connection part.

Moreover, this product comes with a 1-year warranty. However, the warranty is limited and it doesn’t cover damage caused by improper handling or unprofessional installation. It does cover all flaws and damages caused during the production and transportation process, as well as the failure of the valve to fulfill its function .

This wc fill valve is good for regulating the water level, solving the noise problem, as well as the problem of water constantly leaking from your toilet tank into the toilet.

Specifications

Pros

• Suitable for different tank models
• Durable
• Comes with a rich package containing everything you need for easy installation
• Can be adjusted

Cons

• Slightly heavier than most other models on the market
• A bit more expensive than other similar products in the market

Final Verdict

If you are looking for a quality product that will last for decades, we recommend the American Standard 7381.125#400.0070A. It is a universal toilet fill valve made from durable, quality plastic. It will regulate the water level, re-fill process, as well as provide a noise-free experience.

It is not a budget product, but it is definitely worth it. The installation is easy and the package contains everything required to install and use the product.

08 Plumbcraft 7030911

If you trust only brands with long tradition and presence on the market, you might be interested in the Plumb Craft’s 7030911 adjustable model. Plumb Craft has been present on the market for more than 50 years. Customers trust this brand due to its consistent reliable product lines sustained over a long period.

This particular product was tested by independent experts and is proven to save your money through around 38% water savings per flush! This is truly an amazing result which deserves your attention if you are looking for water and money-saving toilet tank fill kit.

How is this possible? How does this particular valve save so much water? The Plumbcraft engineers introduced the revolutionary caps that adjust the water flow, making it effective as a high flow fill valve.  As a result, there is no leakage and, with each flush, you spend less water and save your money.

Moreover, this product is equipped with a safety system which shuts off the water to prevent constant running. Therefore, you won’t pay higher bills, nor experience unpleasant situations with running water.

In addition, the engineers also replaced the old style toilet fill valve system with float balls and they used the anti-siphon technology. As a result, your drinking water is 100% safe.

Is this adjustable? Yes, it is. You can adjust it to anything from 8 to 13 inches. Is it a silent flush toilet valve? Yes! You won’t hear any noise with this valve.

Last but not least, this product will fit most toilet models. It is very easy to install and use. In addition, the product comes with a top-class repair kit including the refill tube.

Specifications

Pros

• Saves up to 38% of water per flush
• Suits all two-piece tank models
• Highly adjustable
• Durable plastic build

Cons

• Not suitable for the dual flush tanks

Final Verdict

If you are looking for a valve that is designed specially to save water, decrease your bills, and increase your drinking water safety, we highly recommend the Plumbcraft 7030911 model. It uses the toilet float valve technology, anti-siphon technology, as well as the anti-running water shutoffs.

09 Mansfield Plumbing 08-1112

This model, the 08-1112, made by Mansfield Plumbing, is a ½ fill valve. What does the ½ fill label actually mean? It means that the principle used to save water implies flushing only half of the tank. This may or may not suit your needs. Therefore, be sure to rethink your needs and preferences before buying this valve.

On the other hand, this is a very good strategy for less water consumption and lowering your water bills. This system means that if your tank has a 1.6-gallon capacity, the water released with each flush will not be more than 0.8 gallons.

Let’s point out other benefits of this valve. It is very affordable. It is significantly cheaper than the majority of other similar products on the market. However, this is a quality product, made in the USA.

It is made from quality plastic, which is a plus, as metal parts corrode due to the fact that the valves are immersed in water. This model is the inline style model, weighing 10.4 ounces.

Specifications

Pros

• Made in the US
• Affordable
• Has a water-saving feature (based on the ½ tank system)
• Made from durable plastic material

Cons

• Comes without the installation instructions

Final Verdict

If you are looking for a ½ tank capacity per flush water release valve system, this should be an ideal choice. It is affordable, water-saving, and made from durable materials.

The only flaw is the fact that there are no instructions in the package. Moreover, you should not buy this valve if you are not keen on the ½ tank release systems.

10 NEXT BY DANCO HydroClean Water-Saving (HC660)

This extraordinary product has everything a good toilet tank valve should have to satisfy our strict review value grid, plus some unique features. Namely, this valve cleans your tank! How? There are built-in cleaning jets that strongly stir up the toilet tank debris. In this way, all accumulated dirt is regularly removed and flushed down your toilet. The tank stays clean.

It also detects the leaks and calibrates it for extra efficiency. You will spend less water and pay less for the bills. How does this valve detect the leaks? It has a built-in system that activates the sound alarm to inform you of the leak. This high-tech feature is unique and rarely seen on the market.

In addition, this water-saving model has a special, additional mini-valve. It is responsible for water level adjustments.

When it comes to the standard features, this product has them all. It is highly adjustable. You can adjust the height from 11 to 13.8 inches. Also, it is very easy to install. You don’t need special tools. It comes with a smart nut that makes the installation process a piece of cake.

Specifications

Pros

• Affordable
• Features many high-tech features, such as leakage detection alarm and tank cleaning technology
• Height adjustable
• Saves water

Cons

• Does not comply with Proposition 65 on harmful substances (State of California)

Final Verdict

If you are looking for a high-tech tank re-fill valve, here’s the winning product: NEXT BY DANCO HydroClean Water-Saving Toilet Fill Valve. This is an effective water saver toilet fill valve. It has a built-in tank cleaning system and smart leakage detection alarm, as well as water saving technology.

This is an adjustable, affordable, and quality product that is very easy to install and maintain. You can conveniently replace your faulty toilet fill valve with this inexpensive option. It fits most tanks and comes with water level adjustment mini valves.

Beginners Guide to Selecting the Best Toilet Fill Valve

1. Internal parts

As fill valves are supposed to stay immersed in water, most experts agree that durable, high-quality plastic is an ideal choice. Even though metal is more durable than plastic, being immersed in water would lead to corrosion.

This is why the quality models are made from PVC, rubber or other synthetic materials and they don’t contain metal parts.

2. Types (Ballcock or Plunger or Diaphragm style)

There are different types of fill valves. If you pick the ballcock valve assembly or the plunger type, it means that the valve belongs to the older generation. It has two key parts – the brass arm and the toilet bowl float ball. If it breaks, you have to get a new part called a rubber washer.

Another popular style is the diaphragm style. It is a bit trickier to repair. However, these are very cheap and you don’t have to spend a fortune on their replacement.

3. Ease of installation & adjustment

It is very important to pick a valve that is easy to install. As this type of thing is usually DIY projects, you probably won’t call the handyman or an expert. That’s why you should look for a model that requires simple installation. However, picking a simple kit isn’t enough if you are dealing with a wall hung toilet with a in-wall flush tank set up. That requires professional help.

Today, most manufacturers provide all of the necessary tools. You can usually install the kit within 10-15 minutes. Also, there are some great models on the market that don’t require any tools for installation.

When it comes to adjustments, most valves today are easily adjustable. This, mainly, refers to the height. This is very important in terms of compatibility with different types of tanks and toilets. The tank position of a comfortable height toilet differs from that of a regular one. Also, users highly appreciate toilet tank fill kits that offer water flow rate adjustments.

4. Anti-siphon feature

This is a great feature that only some specific models come with. If you come across the anti-siphon valve, we definitely recommend you to buy it. What does the anti-siphon feature offer?

Basically, it is a feature that blocks the back-flow of water. This is important for preserving the cleanliness of drinking water system. Simply put, the anti-siphon feature allows the water to flow in only one direction.

5. The height of your tank

The height of the tank used to be the most important determinant when buying the valve. However, today, most manufacturers offer adjustable height models. This is why most valves today fit most tank models. You should pick one with adjustable height. The majority of them have several inches adjustment space, from 7.75 to 13.8 inches or within this range.

6. Your toilet’s flush type & GPF

The wrong kit might lead to incompatibility of your valve and toilet tank. Namely, there are two types of flush – the single and dual flush.

Some water fill kits do not support the dual flush feature. Actually, they won’t fit those tanks. Therefore, you should check your tank type beforehand. Look for the special “dual flush” label on the body of the kit and you’re good to go! Note: these units are usually more expensive than the regular ones.

When it comes to the GPF of your toilet, you must understand and keep in mind some regulations. Namely, GPF stands for gallons per flush. We believe that you have already understood that this story has something to do with the water consumption regulations. Correct!

The Federal law states that the maximum amount of water spent per flush shall not be over 1.6 gallons. If you want to have a high-efficiency toilet, you should go even below this limit. Why is this important for the valve type? Actually, these products are now produced in accordance with these regulations. Pay attention to the labels and you won’t have any bad experiences.

7. Price vs. quality

There are many price categories for these kits. Always remember that you won’t get too much with the cheapest model on the market. At the same time, there is no need for overpaying the valve. You should stick to the balanced, mid-range prices so that you can get a good-quality toilet fill valve at a reasonable cost.

How to spot a good price vs quality ratio? Check for the features. If your valve is made from quality materials and the manufacturer offers a decent warranty, go for it. Remember that you can always find some special offers, even by reputable brands.

Why Do You Need a Quality Fill Valve?

It’s not easy for a regular person to choose the right plumbing fixture and kit. There are so many ways a poorly designed commode fill valve kit may dysfunction , which is also true for a toilet flush tank. The most common problem many users deal with is the valve not registering the water level. Therefore, the tank does not get filled.

The second problem refers to constant re-filling when water keeps going away and therefore re-fills all the time. As a result, you spend lots of water! This is a serious problem you must address immediately.

In addition, many users complain about lots of noise when the tank is getting re-filled. This is also related to the fill valve. Some toilets are slow to fill. This slow re-filling process is another boring problem caused by a poor tank valve.

This is why you must get a quality product that will last a long time and perform in an impeccable manner. In order to pick the right valve, you should know more about its internal parts.

How to Replace A Toilet Fill Valve

Final Words

In conclusion, we hope that you have learned something new from this buying guide. We tried to cover some important points, such as the key valve parts and basic toilet tank valve problems you might have to deal with.

Moreover, remember that finding the best toilet fill valve is not easy. It is a process that requires substantial knowledge and market analysis. This is why we have come up with the top 10 valve review section.

To recap, our overall top choice is the TOTO TSU99A.X model. It has everything an ideal toilet tank fill valve should have– durability, quality materials, warranty, as well as easy installation features and convenience. On the other hand, Fluidmaster 400CRP14 is not only affordable but also a durable adjustable valve. The top silent performer is the KOHLER Genuine Part GP1138930 that comes from a reputable brand and will hush the noise of your toilet. It is the quietest fill valve on the market.

Finally, let’s remind you that there are lots of amazing products out there and you must make your own research as well to find the right kit that fits your needs.

FAQs

1. What are the most commonly replaced toilet parts?

Ans. Flapper, water supply line, fill valve, and wax seal are most common parts that need regular replacement.

2. Is the toilet fill valve repairable?

Ans. Fill valve repair often involves changing the entire valve setup. Some fill valves only need a seal cleaning or replacement to fix the issue.

3 . How do I know if my fill valve is broken?

Ans. Three things state you have a broken fill valve: 

• Poor toilet draining or no draining at all, 
• Your toilet runs all the time, and 
• Toilet tank refilling takes a long time

4. How to measure the length of toilet fill valves?

Ans. You need to measure the length between the bottom of your toilet tank and the top of your fill valve.