Best Toilet Fill Valves For Your Bathroom

Gary Johnson
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Toilet fill valves are perhaps one of the most overlooked aspects of modern bathroom renovations.

If they are not working properly, the entire bathroom design could be grossly affected.

For example, if the toilet is filling too slowly or slowly, you might have a fantasy of the main bathroom faucet dripping incessantly, which may effectively remove any sense of relaxation or pleasure you just dreamed of.

I have found there are a variety of fill valves available on the market. Some of these include the following:

NameCategoryProduct
TOTO TSU99A.X Adjustable Replacement Fill Valve AssemblyBest OverallTOTO TSU99A.X Adjustable Replacement Fill Valve Assembly
Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill ValveBudget PickFluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve
Zurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 GallonUpgrade PickZurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 Gallon

1. TOTO TSU99A.X Adjustable Replacement Fill Valve Assembly

Our rating: 9 / 10

TOTO TSU99A.X Adjustable Replacement Fill Valve Assembly

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Pros:

  • Solid construction
  • Great price
  • The handle is less likely to break off

Toilets are one of the most expensive plumbing items in the home to fix or replace, so it’s always best to do it right the first time. Buying the best toilet fill valve for your bathroom is a great way to prevent leaks and save money.

You can expect a replacement for the existing Toto fill valve to last for around 3 to 5 years (– we recommend that you install a Toto Fill Valve every 10 to 12 years when you replace your toilet tank and bowl). Installation is easy; for most models, the old part just pulls out and the new one just snaps in.

The great thing about these fill valves is the replaceable seat and spud that can be replaced when worn. Although they’re not available now, we anticipate that they will be available in the future. By comparison, replacement fill valves for Kohler toilets, another popular brand, are mostly sold assembled rather than dissembled for parts.

2. American Standard 3174.105-0070A Champion Universal Replacement Flush Valve

Our rating: 9 / 10

American Standard 3174.105-0070A Champion Universal Replacement Flush Valve

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Pros:

  • Fast and convenient
  • Easy to install
  • Compatible with most major brands
  • Premium quality with a budget-friendly price
  • Smooth flushing mechanism
  • Keeps water in the tank even when the tank is full so that the tank can be flushed multiple times

Our pick for the best toilet fill valve online is the American Standard 3174.105-0070A. This high-quality valve includes a premium ceramic flapper, a metal flapper chain, and a brass trip lever. These are some of the most important parts of a good toilet fill valve, so you’re guaranteed to get a high-performing product for a very reasonable price.

Installing this valve is a quick and easy process as long as it’s done correctly. In fact, American Standard’s customer service team is also very helpful if you need some extra guidance.With that said, if you do end up having to replace the flapper at a later date, this is usually because it wasn’t installed correctly in the first place.

3. Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve

Our rating: 8 / 10

Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve

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Pros:

  • One of the most affordable toilet fill valves
  • Durable construction
  • Works with almost any type of toilet
  • Quick and easy installation
  • T6 Technology gives you smooth flushing every single time
  • Low maintenance
  • High water savings
  • Doesn’t require special training
  • Receives high marks for customer service
  • Universal fit

Flush’n with technology…what a great way to describe this universal toilet fill valve from Fluidmaster.

Like a few other brands on our list, Fluidmaster have been in the toilet fill valve business for a while now. In fact, their products are used by professional plumbers, homeowners, contractors, and installers (who are frequently homeowners themselves!).

This is a great all-around option for most people. It’ll look nice with any type of toilet and it’s one of the more affordable universal fill valves on the market.

4. Kohler Genuine Part Gp1138930 Silent Fill Toilet Fill Valve Kit

Our rating: 8 / 10

Kohler Genuine Part Gp1138930 Silent Fill Toilet Fill Valve Kit

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Pros:

  • Easy-to-install
  • Sleek design with brushed chrome finish that looks lovely in any bathroom
  • Durable; expected to last well over a decade
  • Minimal complaints regarding any water leakage

Cons:

  • Expensive for what you get
  • Limited warranty; only covers defects

If you have a Kohler toilet, then I recommend the Genuine Part GP-1138930 Silent Fill Toilet Fill Valve Kit. It’s a solid product with an impressive lifespan, and it’s easy to install.

It’s not a cheap product; you’re getting what you pay for. Kohler is a reputable brand, and the product has a solid history of positive reviews. It’s a good value.

In terms of installation, it’s a piece of cake. User instructions are clear and easy to follow, and the entire process should only take you around 10-15 minutes.

5. Zurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 Gallon

Our rating: 8 / 10

Zurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 Gallon

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Pros:

  • The chromed plastic parts look a lot better than the cheap products available in home improvement stores
  • Installation is a breeze.

Polished Chrome.

It’s tough to find a toilet fill valve that gives you more bang for your buck than the Zurn Z6003-WS1-YB-YC Aquaflush. It comes with a cast wall flange and brass body, polished chrome finish, and a nice ergonomic operation lever.

Most importantly, this valve works like a charm. The water flows precisely and is guaranteed to last you for years to come. The installation process is a breeze too … so easy that anyone can do it.

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

Our rating: 8 / 10

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

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Pros:

  • Adjustable to fit any toilet fill valve hole
  • Suitable even for toilets with low water pressure
  • Protective cover keeps the seat dry and bacteria-free
  • Can be set to allow water at any flow rate
  • Convenient lever for easy access
  • Ideal for preventing clogging
  • Prevents harmful unwanted gases from seeping out
  • Works independently of supply lines and may be used with existing water supply lines
  • Made from 100% tested and certified materials
  • Guaranteed for 5-years

7. Next by Danco HC660 Toilet Fill Valve Repair Kit

Our rating: 7 / 10

Next by Danco HC660 Toilet Fill Valve Repair Kit

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Pros:

  • Great price
  • Fits most popular toilets
  • Easy to install
  • Works well

Cons:

  • You might have to turn off the water to the toilet in order to get this fill valve to work
  • A bit bulky with a lot of exposed hardware

If you’re looking for an inexpensive, yet reliable toilet fill valve replacement, you might want to consider investing in the Next by Danco universal toilet fill valve.

This product is constructed from brass and is meant to be an easy-to-install upgrade to your existing fill valve. It comes with a chrome cap so that it matches the finish of your existing toilet handle.

According to reviews, this fill valve is quite reliable and does everything it’s supposed to. The only trouble is that you might have to turn off the water to your toilet and turn it back on again in order for it to work. However, according to the reviews, once it gets going, it’s quite consistent and you shouldn’t have any further problems.

8. Korky 818BP QuietFILL Universal Toilet Fill Valve and Premium Flapper Easy to Install and Quiet

Our rating: 6 / 10

Korky 818BP QuietFILL Universal Toilet Fill Valve and Premium Flapper Easy to Install and Quiet

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Pros:

  • Premium quality
  • Quiet operation
  • Budget-friendly price
  • Quick and easy installation

Do you spend too much of your life on the toilet? While I’m not entirely sure that that’s something to strive for, a comfortable toilet seat is a necessity for all those trips you make to the bathroom. One of the ways to ensure that you have the most comfortable toilet seat is to invest in one of the best toilet fill valve and flapper sets.

The toilet fill valve you choose is what determines how the water flows from the tank to the bowl, and there are a few different types of fill valves that you can go for. A toilet fill valve with a metal chain is the most common type of fill valve you’ll see on the majority of toilet bowls. What’s great about metal chain fill valves is that they’re super easy and convenient to install. Replacement is also quick and simple.

If you choose to invest in a set instead of just a replacement fill valve, you can purchase a toilet fill valve and flapper set from Korky.

Frequently Asked Questions (FAQ)

Are toilet fill valves universal?

In general, most toilet fill valves are designed to be universal. This means that you can buy a cheap replacement part off of Amazon and install it yourself. There are minor exceptions depending on what type of toilet you have, and sometimes replacing more than one part is required. Check your manufacturer's instructions and the model number of your fill valve before you make your purchase. You should also look for compatible brand names.

There are a few other factors to consider. The first is whether or not you want a toilet fill valve assembly that conserves water. When water conservation is your goal, you can get a fill valve that is equipped with a sensor that turns off the water supply when the tank reaches an appropriate level. Also, some toilet fill valves are equipped with a remote control for easy adjustment by the user. Both of these features can be useful if water conservation is your primary goal.

What toilets do plumbers recommend?

Plumbers generally have a recommendation as to which toilet models are better than others, although it’s important to keep in mind that it’s all based on their own hands-on experience. For instance, an older plumber may have used AquaPis terribly in his youth, so if he recommends a certain brand, it’s worth remembering that he may have a personal bias.

What is the quietest toilet fill valve?

The best and most quiet fill valves are actually the easiest. There are several vents on the side of the fill valve that can be opened and closed to adjust the flow of water to the tank. All you have to do is close off some of these vents to make the water flow at a slower rate. In other words, the less the vent is open, the slower the water flows.

The problem is that it can often be hard to see and feel which vent is open and which ones are closed. If you're like us, you'll be adjusting the fill valve until you find the sweet spot.

It's still usually a better idea to not drill any additional holes in the tank than it is to use a loud fill valve. If you want the silent one, we've chosen the one described above as the most silent.

How do I know if my fill valve is bad?

The most obvious sign you need to replace your fill valve is that your toilet keeps running after you flush. While this one should be a dead giveaway, sometimes the valve gradually becomes less and less efficient at filling the tank so the water may not be running water for a few additional seconds than normal. If your toilet always run, you should consider a replacement.

Other signs that it is time for a replacement valve include:

  • Your toilet runs more often than it used to
  • The valve constantly runs without using the flush handle
  • When you flush, you hear a buzzing or clicking noise before water is dispensed

Water leaks from the tank into the toilet bowl after shutting off the valve.

None of the above symptoms mean you need a new one right away, but it pays to call in the professional and get the issue checked out anyway at your next opportunity.

Conclusion

The best time to replace your bathroom sink fill valve is when the sink starts to leak or when a toilet tank fills slowly. Check your toilet tank water pressure and water flow with a meter to ensure the fill valve is functioning correctly. If your bathroom sink has a water conserving feature that you don’t like or end up using, you can replace it. Save your money by installing the new fill valve yourself to stop the water flow from the supply pipe.

Our Recommendation

NameCategoryProduct
TOTO TSU99A.X Adjustable Replacement Fill Valve AssemblyBest OverallTOTO TSU99A.X Adjustable Replacement Fill Valve Assembly
Fluidmaster 400AH PerforMAX Universal High Performance Toilet Fill ValveBudget PickFluidmaster 400AH PerforMAX Universal High Performance Toilet Fill Valve
Zurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 GallonUpgrade PickZurn Z6003-WS1-YB-YC Aquaflush Flush Valve 1.0 Gallon