10 Best Toilet Fill Valve for Hard Water [2023]-Reviews & Buying Guide

You can find many best toilet fill valve for hard water in the market but is it easy to find the right and reliable one? No need to worry, we are here to help you with a simple guide to the neonatal level for the best toilet filling valve.

Toilet fill valves generally last almost four or five years without causing any issues. But if you face problems with your toilet valves, you might notice some signs such as leakage, noises, and weak flushing power, indicating that you need to replace the valve.

In this article, We have discussed everything that you need to know about toilet fill valves. So, stay tuned and read it thoroughly.

What is The Best Toilet Fill Valve for High Pressure?

If you’re looking for the best toilet fill valve for high pressure, you’ve come to the right place.

In this post, we’ll take a look at the different types of valves available and how they work, so that you can find the perfect one for your needs.

We’ll also provide some tips on installation and care to ensure that your new valve lasts as long as possible.

So, whether you’re upgrading an older model or just want a little extra peace of mind, read on for everything you need to know about choosing and installing a high-pressure toilet fill valve!

Our Top pick On Best Toilet Fill Valve for Hard Water

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Top 10 Best Toilet Fill Valve for Hard Water

User-friendly portable and standard quality flush installations are getting popular day by day. If your toilet fill valve is not working correctly, you should replace it with a new and modern portable one.

We have discussed everything about choosing the best toilet fill valve to help you choose the best one for your toilet. Now, let’s see the short reviews on the top best toilet fill valves. Then, you can select one that is matched your choice and budget.

 01.Kohler Genuine Part Gp1083167–The Quietest Toilet Fill Valve

Kohler Genuine Part Gp1083167–Quietest Toilet Fill Valve

Kohler is one of the most famous and old brands that brings high-quality sanitary equipment, engines, and many more things. As this company has been working for more than 140 years, there is nothing to say about their product quality. 

For premium quality parts of your toilet, you can take their product without any hesitation. For example, take the Kohler toilet fill valve and ensure excellent performance for a long time. Not only is the product good, but also its installation process is easy.

Within only 30 minutes, you can install this valve to the toilet tank. Then, with your household tools, easily install the valve. And with a serial number of model capability, you can check if the toilet model is suitable for it. 

If you want a toilet tank that keeps the silence of the toilet, this option is best for you. As a versatile product, most of the bathrooms are suitable for it. Besides, the height is easily adjustable. Get an average of 20 years of longevity! That is amazing!

The performance is optimized because of the multiple fill rate. Determine the correct part from the shank color.

Kohler Genuine Part Gp1083167 Pros

  • The genuine part of Kohler company
  • Silent fill technology keeps toilet quiet
  • Five fill rate adjustments available
  • Easy installation
  • Flexible product

Kohler Genuine Part Gp1083167 Cons

  • Not usable for all types of toilets
  • Slightly expensive

02. Fluidmaster 400AH–Best Toilet Valve Replacement Part

Fluidmaster 400AH-Best Toilet Valve For Hard Water

If you are searching for a mid-budget toilet valve, then the Fluidmaster is the best toilet fill valve for high pressure. This longest-lasting toilet filling valve provides you heavy-duty performance. So, replace your old, leaky, noisy one with this model. It can tolerate high pressure for years.

As the model is universal, don’t be tensed about your toilet model. It might fit with any toilet but is for hard water, not for mild conditions. Also, you will be amazed at the warranty coverage of the product. It comes with a seven years warranty!

The easy installation feature allows you to install the valve quickly. You can adjust the height from 10 to 15 inches. This powerful model also minimizes the noise of the toilet tank. Roller-clamp control helps you to control water usage easily. 

Its high efficiency is 1.28, 1.6 gallons of water per flush toilet. You can also use a dual flush of 3.5 gallons. 

Fluidmaster 400AH Pros

  • Provides faster refill
  • Fastest toilet fill valve
  • Suitable for most of the giant toilet models
  • Comes with 7 years warranty
  • It is the quietest one
  • Has dual flush feature

Fluidmaster 400AH Cons

  • Some consumers complain about its durability, but they are very few.

03. American Standard 3174105-0070A-Champion Universal Replacement Toilet Fill Valve

American Standard Toilet Flush Valve-American Standard 3174105-0070A

American Standard brings hardware products and parts durable, reliable, and come with better engineering technology. For everyday use, their products provide the best service. However, if you like beautiful products with outstanding performance, try this universal toilet fill valve.

This one is suitable for your two-piece toilet. Replace champion 4 flushing system with this part. The height of the tube is 7 inches. Install it easily. Your user experience may be better with this one.

American Standard 3174105 Pros

  • Durable one.
  • Easy installable
  • Satisfactory performance
  • Affordable price
  • An excellent choice for a 2- piece toilet.

American Standard 3174105 Cons

  • After a long time of use, the ring may not work well.

04. TOTO TSU99A.X – Best Toilet Flush System with Adjustable Height

TOTO TSU99AX-Replacement Fill Valve

This TOTO adjustable height fill valve is compatible with most of the current models of TOTO toilets. You can easily adjust the height according to the toilet tank.

However, TOTO is a well-known brand for toilet fittings. It is a Japan-based manufacturer that is a famous one with a great success history of more than 100 years in the international market. So, there is nothing to say about their product quality.

Replace your faulty toilet fill valve with this model and enjoy optimal performance. It comes with a valve, a refill tube, cone washer, and nuts with a 7/8 inch connection.

We find that it is effortless to install by following the instruction guide because it is simple. Enjoy the best water-efficient performance quietly. Though they give you a short warranty, you can use it for 12 to 13 years without a problem.


  • Hard construction
  • Comes with an easy installation manual
  • Refills quickly
  • Compatible for most of the toilet models


  • The warranty time is short
  • Little bit expensive

05. Fluidmaster 400CR – Great Toilet Tank Fill Valve Repair Kit

Fluidmaster 400CRP14-Universal Toilet Fill Valve

Fuildmaster’s parts are always the best. This one is an excellent model that can be the best choice to replace your previous one. The height is customizable from 9 to 14 inches. For smooth and hassle-free operation, you can purchase this one with a 5 years warranty.

The best side of this part is its flexible height adjustment feature. In addition, the discharge water amount is 3.5-gallons which is excellent.

A microban coating covers the flapper and prevents bacteria that can destroy rubber. It also prevents leaking because it is chlorine resistant. Within only 19 minutes, install this fill valve.

Fluidmaster 400CR Pros

  • A great one at a reasonable price with 5 years warranty
  • The flapper part also included
  • It is mostly compatible with 2” flush valves toilets
  • Easily adjustable height
  • Corrosion-resistant

Fluidmaster 400CR Cons

  • You cannot adjust the water usage for every flush.

06. Korky 528 – Top Budget Adjustable Fill Valve

Korky 528 Toilet Fill Valve-Universal Toilet Fill Valve

Korky is a US brand. If you are searching for an easy-to-install fill valve for your toilet, this one can be a good choice. This dedicated brand has many years of experience in toilet parts manufacturing. 

Most of the toilet sizes are suitable for it because it is easily adjustable from 7.75 inches to 13.5 inches. If your toilet flush does not work properly or works slowly and produces noise, then this one is the best choice for you. 

Another good news is that this one is fitted to other standard brands such as Kohler, Glacier, American Standard, etc. of new or old models.

Korky 528 is popular because of its simplicity. So, for your 2-piece or 1- piece toilet, you can take this universally. In addition, Chlorazone makes it a durable one.

Korky 528 Fill Valve Pros

  • It is a cheaper option with a great warranty
  • Compatible for most the toilet
  • Chlorazone protection increases durability
  • Compatible with other brands

Korky 528 Fill Valve Cons

  • Can be noisy

07. Fluidmaster 400LS – Best Toilet Fill Valve for Hard Water

Fluidmaster 400LS-Fluidmaster Fill Valve

Fluidmaster is always the best choice for toilet fitting parts. Among many models, this one is another best toilet valve and flapper model for hard water. If you want a reliable filling valve at mid-budget, this one is highly recommended.

The product is designed in such a way that it can tolerate high pressure for many years. It fits most of the toilets and fixes noise, and increases the flushing efficiency. Like other fluid master models, do not use it for mild conditions.

This one is similar to the 400A model. However, it comes with water-saving and leaks prevention features. The flushing volume is between 7 to 3.5 gallons for every flush. If your toilet tank has any problem like a faulty flapper, the leak prevention system of the valve stops automatic refill.

Besides, the roller clamp regulates the proper amount of water refilling with maximum efficiency. So, replace your leaky and inefficient toilet valve with this great one.

Fluidmaster 400LS Pros

  • Comes with a leak protection feature
  • Not noisy
  • Simple and fast-filling design
  • Suitable for a high-pressure system
  • Overall duration is 13 years

Fluidmaster 400LS Cons

  • Little bit expensive

08. Korky 528PRO – Best Toilet Fill Valve for High Pressure

Korky 528PRO

This universal model has been suitable for most toilets since 1994. The height is adjustable from 4 to 7.8 inches of the bathroom. It is an excellent solution for slow filling noisy toilets. It prevents the waste of water because of its twist-lock adjustment.

The design of this part is suitable for solid fitting and quiet operation. In addition, it is ideal for high pressure and is fitted to most Kohler, Gerber, TOTO, etc. Though the size is a little bit small, it provides you a great user experience.

As a USA-made product, its quality is standard. The main target of this design is to lower water consumption and increase durability. Additionally, 7 years warranty is fantastic.

Korky 528PRO Fill Valve Pros

  • Standard one for hard water
  • Suitable for most of the toilets
  • Comes with a chlorzoxazone gasket
  • Easy installation
  • An incredible time of warranty

Korky 528PRO Fill Valve Cons

  • Slightly costly

09. Next by Danco HC660 – Excellent Water-Saving Fill Valve

Next by Danco HC660

Danco is another well-known brand for plumbing repair and replacement. Their products are affordable, standard, and elegant. The company targets to bring out products that are easy to install without the help of professionals.

However, this one is the right solution for searching for water-saving and leak prevention models.

This one can easily adjust to using the right amount of water and refills quickly. This extraordinary one comes with some extra features. It keeps the water tank clean with its cleaning jets. If there is any leak, the valve provides signals because of its leak detection feature.

It is not a smaller one. You can fit it into your 11 to 13.8 inches toilet tank. Without any tool, install the part easily.

Next by Danco HC660 Pros

  • Reasonable price
  • Best features such as leak detection, tank cleaning technology
  • Comes with adjustable height
  • Water-saving one

Next by Danco HC660 Cons

  • A little bit louder

10. Sloan C-100500-K-Toilet Fill Valve Cartridge Assembly Kit


Solan is also a USA-based brand. It is a small but efficient tool. You can try it for your faulty water tank.

If you try it, you may find that it is beneficial to solve some common flushing problems. Most of the current tanks are suitable for this model.

This cartridge kit comes with a flush valve, duckbill valve, intel supply screen.

Sloan C-100500-K Toilet Fill Valve Pros

  • Made of durable plastic
  • Fits most of the modern toilet tanks
  • Affordable price range
  • Compatible with most of the models

Sloan C-100500-K Toilet Fill Valve Cons

  • A little bit hard to install

What Is Best Toilet Fill Valve?

There is a lot of debate over what is the best toilet fill valve. Some people swear by ballcocks, while others prefer dual flush valves.

So, which one is really the best? The answer to that question depends on your personal preferences and needs.

In this blog post, we’ll take a closer look at some best types of valves and help you decide which one is right for you.

In the home, there are many different types of toilet fill valves that can be installed to help conserve water.

The type you should install for your specific needs depends on the age and style of your toilet as well as how often it is flushed.

The latest technology in toilets has made installation easier than ever before with a variety of options available to suit any budget or need.

Read below we wrote some types of best toilet fill valves to find out more about what features are best for you and why every single household should have a new high-efficiency toilet!

Which is the Top Rated Toilet Fill Valve?

When it comes to toilets, there are many important parts that work together to make sure everything goes smoothly.

One of the most important is the fill valve. This post will explain what a fill valve is and how to find the best one for your needs. Stay tuned!

If you’re in the market for a new toilet fill valve, it can be difficult to decide which one is the best fit for your needs.

There are a variety of factors to consider, from price to performance.

In this blog post, we’ll take a look at some of the top-rated toilet fill valves on the market and help you decide which one is right for you.

So, whether you’re looking for a budget-friendly option or something that offers more features, we’ve got you covered in this article!

Which is Quietest Toilet Fill Valve?

The quietest toilet fill valve is one that minimizes noise while still having enough water pressure to do the job. But what makes a toilet fill valve so noisy in the first place?

Toilets are designed with an overflow pipe, which creates sound when it fills up and empties over time. There’s also some other factors that can contribute to loudness like water pipes running under your house or any plumbing fixtures nearby.

 Luckily there are ways you can minimize this noise including reducing the flow of water into the toilet, installing low-flow toilets, or replacing noisy valves with quieter ones!

What Is Fastest Toilet Fill Valve?

Anyone who has ever had to use a public restroom knows the urgency of a toilet that’s filling up too quickly.

It seems like every time you need to go, the toilet is taking forever to fill up. You start to wonder if there’s something wrong with it.

Is there some sort of faster toilet fill valve out there that you don’t know about? As it turns out, there is – and it can make all the difference when you’re in a hurry.

When it comes time to replace your toilet fill valve, you may be wondering what the best option is.

There are a few different types of fill valves available, and each one has its own advantages and disadvantages.

In this post above, you can take a look at what the fastest toilet fill valve is and how it works. We’ll also be discussing some of the benefits of using one in your home bathroom. So read on to learn more!

How To Replace a Toilet Fill Valve?

The toilet fill valve controls the freshwater flow into the toilet tank. So, the toilet’s flush button When it gets leaked, water will come all the time. However, we cannot go with a faulty valve. So, purchase a new one and replace the older one.

Let’s see the best way to replace the toilet fill valve.

Remove the older toilet filling valve.

First, you have to remove the older valve. To do this, turn off the water supply of your toilet. Then, find and remove the water valve that is added to the tank directly. Alternatively, you can turn off the main water supply. It might be outside of your home.

Drain your toilet tank

Now, it is time to drain the tank. To do this step, press the toilet’s flush button and hold it down to drain all the water. After draining the water, use a vacuum or a dry towel to remove the small amount from the tank’s bottom.

Find out the toilet fill valve and detach it.

Now find out the fill valve. Carefully remove the lid of the tank. You may find the fill valve inside it. It contains a plastic column with an on-off lever. The valve also includes a tube connected to an overflow pipe.

Now, detach it. Take out the supporting nuts. Take out the supply line from the valve.  

Add the new toilet fill valve.

Unpack your new toilet fill valve. Now, you have to put it in the correct place. First, read the manual. However, this part comes fully assembled. So just put it in the toilet tank straight.

Carefully put all the parts in the appropriate place, such as washers, nuts, etc. For example, washers are on the inside and outside of the toilet tank. Use a water-tight seal to seal appropriately around the connections.

Now tighten all the nuts carefully. Then you have to attach the water supply again. Use a wrench to tighten it. After that, you can turn on the water supply.

Toilet Fill Valve Replacement Cost

Toilet fill valve replacement cost depends on several matters. If you want to replace it yourself, you just need to spend money to purchase the part. It can cost you from 50$ to 190$. But if you call a plumber, the cost will increase between $130 and $310. 

Toilet Fill Valve Types

Toilet fill valves are the most important part of a flush toilet. It fills the toilet tank and controls water flow. There are the most common five types of the toilet fill valve. They are:

Ballcock Fill Valve

It is also known as a piston fill valve. Generally, this type is metal-made and the most common type.

Fluidmaster 400A series valves are this type.

Float-cup Fill Valve

It is an older model of the fill valve. Instead of floating balls, it contains a floating cup.

Floatless Fill Valves

This technology does not use floating parts. It is a newer type and suitable for low-flow toilets. Besides, the price of this valve is lower.

Metal Diaphragm Fill Valve

This type is similar to piston valves.

Plastic Diaphragm Fill Valve

This type is made of PVC plastic. But it is a durable and moisture resistant one.

What Is Most Reliable Toilet Fill Valve?

There is nothing more frustrating than when your toilet fills slowly or stops completely.

This can be caused by a faulty fill valve that needs to be replaced with one of the best in the industry. 

It’s important to know that there are many different types of valves on the market and not all will suit your specific needs.

A few key points to consider include type of toilet (1 piece vs 2 pieces), water pressure in your home, and if you have an older model toilet where you need to replace both tanks at once. 

When purchasing this vital part for your plumbing system it pays off to do some research before making any purchases!

We’ve done our homework for you and found out which brands are most reliable based on customer reviews, pricing. which is listed below!

  • 1. Ballcock Fill Valve
  • 2. Float-cup Fill Valve
  • 3. Floatless Fill Valves
  • 4. Metal Diaphragm Fill Valve
  • 5. Plastic Diaphragm Fill Valve

Toilet fill valve parts

When you face a problem with toilet fill valves, check the valve and replace the damaged parts. However, the small parts of the fill valve are shank nut, coupling nut, plungers, ballcock cup, Ballcock top assembly, etc. Most of the parts are available in the market.

Toilet fill valve problems

Toilet fill valve controls water flow into the tank. You may face problems with this part for various reasons. The most common issues are float adjustment and clogged valves, flush valves, running toilet problems, etc.

Frequently Asked Questions

Q. What is a toilet fill valve?

Ans: A toilet fill valve is an essential part of a toilet. It is located inside of the toilet tank and controls the water flow for every flush and fill the tank.

Q. How does a toilet fill valve work?

Ans: A toilet fill valve contains a handle, flapper, and float valve. When you press the button, it flushes water. The main work of this part is to control water flow for every flush and fill the tank.

Q. How long does a toilet fill valve last?

Ans: It depends on the quality of the valve. Most of the reliable valves work for an average of 10-14 years.

Q. What does a toilet fill valve look like?

Ans: A fill valve looks like a piston with some other parts. For a little Knowledge See the below Image.

What does look

Q. Which toilet fill valve to buy?

Ans: There are many models and brands in the market. You can buy any one that is fitted to your toilet model and lasts for a long time. 


I hope this guide on the best toilet fill valve for hard water has given you enough Infos and options. Then, you can choose the most promising and compatible one among them. 

So, why are you tolerating the problem with your toilet tank, buddy? Just keep a budget, choose the product and take the right model. 

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