11 Best Toilet Fill Valves In 2021

Best Toilet Fill Valves In

A toilet fill valve is to a toilet tank what an engine is to a car. Have you ever stopped to think about what it would be like if your toilet tank could no longer refill by itself? Well, needless to stay, that’s a terrible spot to be in. If you didn’t know already, a small component called a toilet fill valve is responsible for refilling water into your toilet tank. While it might be small in size, it proves to be a crucial component.

If you’ve been having trouble with your cistern refilling water or facing other issues like a leaky cistern, it might be time to change the fill valve. While there are many fill valves to choose from, choosing the right type of fill valve is crucial. Here are the major types of fill valves.

Types Of Toilet Fill Valves

  • Ballcock toilet fill valves

The ballcock fill valve is one of the oldest types of toilet fill valves. This vintage-style fill valve consists of a ball and rod design. The ball or balloon is made up of either plastic or thin metal and goes up and down depending upon the water level inside the cistern. As soon as the ball is pushed upwards, indicating that the toilet tank is full, the fill valve stops taking in water. While these work well, they are large, heavy, and based on old technology.

  • Float cup toilet fill valves

This is an improvement in design over the tried and tested old-fashioned ball and rod fill valve. It is designed to fit numerous types of gravity-flush toilets that are floor-mounted. These float cup-type flush valves are a replacement for ballcock fill valves. Instead of a heavy, large ball, this system incorporates a float cup that drops along with a drop in the water level. As soon as the water level in the tank lowers, the float cup drops, signaling the fill valve to refill the water in the tank. As the water level rises to the predetermined shutoff level, the float cup also rises and signals the fill valve to shut off the water supply.

  • Pressure-activated and anti-siphon valves

This style of fill valve is quite different from both the ballcock and float cup designs. While it looks quite similar to gravity-fed fill valves, it deviates from them, in that it doesn’t have a cup or balloon to control the filling of water in the toilet tank. These fill valves are generally small in size and sit at the bottom of the tank. However, once spoilt, they need to be replaced. Anti-siphon valves are pressure-activated fill valves that prevent water from being sucked back into the water supply when there is low water pressure.

  • Dual-flush fill mechanics

These fill valves are quite similar to standard fill valves with the main difference being that they come with a switch that allows dual operation. In simple terms, these fill valves have a switch that allows one to alternate between a full flush and a half flush. This is beneficial in saving water during situations that may not require a full flush. Do bear in mind that standard toilets with a single flush will not support dual flush fill valves.

Since you’ve taken the time to orient yourself with the different types of fill valves, it’s time that you have a look at our list of the 11 best toilet fill valves.

11 Best Toilet Fill Valves

1. Korky 528 QuietFill Toilet Fill Valve

Korky 528 QuietFill Toilet Fill Valve

The new and improved technology implemented by Korky replaces old and slow toilet fill valves that not only take time to fill but are also worn down and ineffective. This plastic fill valve has been designed to easily fit both 1 and 2-piece toilets. It is a quick solution to leaky and running cisterns and also fills large cisterns in no time. Owing to its user-friendly design and accessories included for setup, this fill valve has emerged as a popular choice among consumers. The company has slapped a 5-year warranty on this product.


  • Quiet operation
  • Easy installation
  • Universal fit
  • An innovative twist-lock adjustment


  • It may not be suitable for use where the water is extremely cold.

2. Kohler Silent Fill Toilet Valve Kit

Kohler Silent Fill Toilet Valve Kit

This toilet flush valve with genuine Kohler parts is designed for smooth operation. It fits all Kohler class 5 toilets and is crafted from hard plastic. You can now replace your old fill valve with an OEM Kohler part for exceptional product performance. The cap comes in 5 smart colors like black, silver, white, red, and blue. It is important to keep in mind the shank color and model number while purchasing the fill valve. The silent fill feature allows the cistern to fill without any noise. To avoid scratches on the well-designed superior quality plastic, use soft material or sponge to clean the surface. This replacement kit comes with a fill hose, valves, inserts, and assembly hardware.


  • Adjustable height
  • Easy installation
  • Water-saving
  • Quick filling


  • Might get clogged with sediments

3. TOTO Adjustable Toilet Fill Valve

TOTO Adjustable Toilet Fill Valve

The TOTO assembly fill valve boasts a robust exterior that is made from high-quality plastic. It has a cutting ring inlet connection and a G-connector for an outlet connection. With its adjustable height and compact layout, it fits many toilet tanks. The height of the fill valve can be set between 7.75 inches and 13.5 inches in any TOTO cistern. This toilet valve replacement set includes a cone washer with a nut, refill tube, clamp, and valve.


  • DIY installation
  • Flexible height
  • Universal fill valve
  • Standard inlet connection


  • May not refill the tank very quickly

4. Danco 80816 Toilet Tank Fill Valve

Danco 80816 Toilet Tank Fill Valve

Restoration of a leaky or old toilet tank is made easy with the Danco toilet repair kit. The repair kit consists of a flapper with an adapter, float with a rod, ballcock with refill tube, and spring to install new life into your old cistern. The total height of the brass rod once threaded through the fill valve and float sums to 11.75 inches. The toilet flapper is designed to fit 2-inch toilet flush valves. The overall height of the fill valve is 8.5 inches. This product is available for purchase in 2 shades of white.


  • Durable plastic design
  • Universal fit
  • Single-flush application
  • Easy installation


  • The float rod might be too long for some toilet tank

5. Hibbent Adjustable Universal Fill Valve

Hibbent Adjustable Universal Fill Valve

The Hibbent toilet fill valve is not only designed to fix leaky or noisy toilets but also to improve the flow of water in the cistern. The easy-to-adjust valve height between 7.8 inches to 13 inches makes it a universal and well-designed plastic fill valve that fits brands like Kohler, Toto, and American Standard toilets. The water level adjustment is a unique feature allowing the levels to range from 4.7-inch to 10.2-inch.


  • Tool-free installation
  • Universal valve design
  • Prevent wastage of water
  • Inbuilt filter


  • The valve may not shut off immediately.

6. Next By Danco HC660 Toilet Flush Valve

Next By Danco HC660 Toilet Flush Valve

Constructed with superior quality acetal and polypropylene, Next by Danco is an advanced fill valve repair kit with an adjustable height of 11 to 13.8 inches. A built-in mini-valve to adjust water levels and an audible alert to notify a leak in the cistern ensure that no water is wasted. Its self-cleaning jets stir up dirt on the tank bed, allowing it to be flushed, keeping the cistern clean. Repairing a tank with this adjustable toilet valve is made easy thanks to its float lock that shuts off the water inside the tank.


  • Quick refill
  • Automatic tank cleaning
  • Tool-free installation
  • Full flush efficiency


  • It may get a little noisy.

7. American Standard Fluid Fill Valve

American Standard Fluid Fill Valve

This well-crafted fill valve by American Standard is made of hard plastic that will stand the test of time. The fill valve is relatively lightweight and compact. Owing to its 10-inch height, it will easily fit in small as well as large-sized cisterns. It is designed to refill water in your cistern as quickly as possible without resulting in any leaks. The company bundles with the unit all necessary accessories like the shank washer, refill tube, coupling washer, coupling nuts, refill tube, and refill clips.


  • Fits most toilets
  • Quick installation
  • High water fill rate
  • Adjustable design


  • It may get clogged if there is high mineral content in the water.

8. Fluidmaster 400H-002 High-Performance Fill Valve

Fluidmaster 400H-002 High-Performance Fill Valve

This fill valve by Fluidmaster is a work of sheer brilliance. The fill valve is built from plastic and designed to operate efficiently and effectively while producing minimum noise. The company has ingeniously designed the fill valve with a quick height adjustment between 9 and 14 inches. This makes it easy to fit in almost all cisterns. This fill valve is a perfect replacement for noisy, old, or leaky fill valves. Included with the fill valve are the required accessories for installation and a step-by-step instructional manual. The company provides a 7-year warranty of its Fluidmaster 400H-002 model.


  • Adjustable water level dials
  • 2x greater bowl refill
  • Powerful flush
  • Universal fit


  • Some may find that the quality of the rubber washer is not up to the mark.

9. Cosybreeze 400AH High-Performance Toilet Fill Valve

Cosybreeze 400AH High-Performance Toilet Fill Valve

The Cosybreeze fill valve looks as good as it functions. The build quality of this fill valve is phenomenal because of its ability to withstand debris and sediments. The fill valve fills the toilet tank as soon as the water is released. Thanks to its state-of-the-art design and functionality, it serves as a replacement for fill valves that are outdated and inefficient. The PerforMAX technology incorporated into this flush valve allows the water to flow out of the cistern at a desirable force. To ensure that it fits most cisterns, the company has equipped it with an adjustable height, ranging between 10 inches and 15 inches.


  • Quick and easy installation
  • 2x greater fill rate
  • Water-saving roller clamp
  • Quiet operation


  • Some may find installation slightly tricky.

10. RDEXP White Inlet Fill Valve

RDEXP White Inlet Fill Valve

This water-saving flush valve is ideal for most toilets. This fill valve can control the amount of water flushed into the toilet through a quick switch. Since it fits most cisterns, it is used to easily replace aging or noisy fill valves. The entire body is crafted from hard plastic that is resistant to water stains. This highly functional flush valve is lightweight and compact.


  • 2-piece float
  • Leak-free design
  • Momentary shutoff
  • Easy installation


  • It may not be the best fit for a 3-inch toilet bowl.

11. Plumb Pak Anti-Siphon Toilet Valve

Plumb Pak Anti-Siphon Toilet Valve

The flush valve by Plumb Pak is designed to fit standard 2-piece toilets. Its compact size makes it a replacement for flush valves that are using outdated technology like ballcocks. The plastic shell is connected to the water inlet pipe to allow for continuous and seamless water flow into the cistern. While this may not have all the bells and whistles like other fill valves, it is easy to install, use, and maintain


  • Space-saving layout
  • Gravity controlled
  • Water level control knob
  • Quiet operation


  • The flush pressure might be a little less.

Now that you’ve had a look at our list of the 11 best fill valves, it’s time for the next step. Before choosing one for your toilet tank, you need to know what to keep an eye out for. Lucky for you, we’ve outlined some of the main considerations to bear in mind when choosing a toilet fill valve.

How To Choose The Best Toilet Fill Valve

  • Type and model

The kind of fill valve that you will need will be determined by the toilet tank you have. Replacing your fill valve includes identifying the old one to know which type of fill valve to purchase. While there are different types of flush valves to choose from, you might be limited by your toilet tank. So, do check carefully before purchasing a toilet fill valve.

  • Material

While plastic might not always be as durable as metal, when it comes to a flush valve, it is the better choice. Plastic fill valves are more durable than their metal counterparts because they are not subject to rust and corrosion. Corrosion of metal fill valves often leads to leaks and malfunction.

  • Noise level

There is a considerable amount of noise while emptying and refilling the toilet tank and that can be quite annoying. If noise bothers you to the extent and gets on your nerves, it is advisable to purchase a fill valve that provides quiet operation.

  • Fill and flush rate

While it may seem like the only factor to consider would be how fast it fills and flush, it isn’t so. The fill valve of the toilet tank depends on the inlet through which the water passes. The inlet of the toilet flush valve should be able to handle the water pressure that the fill valve supports for the valve to be most effective. The flush rate of the fill valve is directly related to the toilet’s flush cycle. You must choose one that matches the flush cycle of your toilet. Most older toilets support a 2-inch flush valve, while most modern ones require a 3 or 4-inch flush valve.

  • Other features

Some other features to look out for include whether the flush valve has an adjustable height, a switch to change between half and full flush, and ease of installation. Having a fill valve with an adjustable height ensures that the size of your cistern will not prove to be a restriction. Having the ability to switch between half and full flush results in saving water, and a toolless installation will avoid the need for a plumber.

Frequently Asked Questions

1. Can a toilet fill valve be repaired?

The answer to this lies in the model of the fill valve used in the toilet tank. Certain brands like Fluidmaster allow for quick replacement by replacing the seal inside the unit. However, other brands may not be so repair-friendly. If the toilet flush valve cannot be repaired, the only option left would be to replace the entire unit.

2. How do I clean a toilet flush valve?

Fill valves often get clogged with debris and sediments. Thankfully, cleaning them is easy. Once the cap of the fill valve is removed, carefully inspect for debris that might be stuck in and around the body of the fill valve. Use an inverted mug over the opened fill valve and turn on the water supply. This will force the water to circulate through the body of the fill valve and release the debris or sediments. Repeat this process at least twice to clean the fill valve.

A toilet fill valve is an integral part of any toilet system. It must be purchased after careful consideration and maintained regularly. One’s worst nightmare would be to wake up in the morning only to find that the flush no longer works. This inexpensive little machine can save you from a world of trouble. Unfortunately, like any machine, it too is prone to failure at some point in time. You should not only clean the fill valve but also check for signs of possible failure. If you feel like your fill valve is on its last legs, it’s best to get it changed before it completely fails. If you’re on the hunt to choose a fill value, make sure to revisit our list of the 11 best toilet fill valves