Best Toilet Flush Valves of 2025

Harry Stack Avatar
Harry Stack
Last Updated: Jan 15, 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Toilet flush valves are essential components of any toilet system. They are responsible for controlling the flow of water from the tank into the bowl, allowing for efficient flushing of waste. Flush valves come in different types, including manual and automatic, and are made from various materials such as plastic, brass, and stainless steel. Some models also feature adjustable water volume and flushing power, allowing users to optimize their water usage and reduce their environmental impact. Overall, toilet flush valves play a crucial role in ensuring the proper functioning and sanitation of any toilet system.

At a Glance: Our Top Picks

Fluidmaster 400H-002 Universal Toilet Fill Valve Cover #TOP 1
Fluidmaster 400H-002 Universal Toilet Fill Valve
ftb score rating icon 9.9
Kohler 3" Toilet Flush Valve Kit Cover #TOP 2
Kohler 3" Toilet Flush Valve Kit
ftb score rating icon 9.8
Kohler Genuine Part GP1083167 Silent Fill Valve Kit Cover #TOP 3
Kohler Genuine Part GP1083167 Silent Fill Valve Kit
ftb score rating icon 9.6

Top 10 Toilet Flush Valves

#TOP 1

Fluidmaster 400H-002 Universal Toilet Fill Valve

400H-002-P10
Multicolor
1- Pack
Fluidmaster 400H-002 Universal Toilet Fill Valve Cover
Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor

Fix noisy or slow filling fill valves with the quietest and most powerful toilet fill valve. It is easy to install with step-by-step instructions included, and has a universal fit for most toilet models and brands. The tank and bowl water level adjustment dials help to customize the perfect flush and save water.

What We Like
Quick and easy installation
Adjustable fill settings
Quiet operation
Good value for price
Compatible with various toilets
What We Don't Like
Can be slightly loud at max fill
Thick valve housing design issue
#TOP 2

Kohler 3" Toilet Flush Valve Kit

1069722
Black
Kohler 3" Toilet Flush Valve Kit Cover
KOHLER 3" Toilet Flush Valve Kit, Black, Compatible with Kohler Wellworth toilets, 3" Canister with a 3" Outlet, GENUINE PART 1069722

The Kohler Genuine Part 1069722 3" Toilet Flush Valve Kit is a canister flush valve kit designed for Kohler Wellworth toilets. It features a 3-inch canister with a 3-inch outlet that is compatible with the Kohler Wellworth Highline Classic tank model number K 4632. The kit includes a complete assembly with a tank to bowl gasket. To ensure compatibility, users can look inside the back wall of the toilet tank to identify the tank model number.

What We Like
High-quality item
Easy installation
Includes all necessary parts
Effective leak prevention
Good instructions and support
What We Don't Like
Removing large nut can be challenging
Some parts slightly different from original
#TOP 3

Kohler Genuine Part GP1083167 Silent Fill Valve Kit

GP1083167
Black
12.5" x 3.5" x 3"
Kohler Genuine Part GP1083167 Silent Fill Valve Kit Cover
Kohler Genuine Part Gp1083167 Silent Fill Valve Kit For All Kohler Class Five Toilets,12.5" x 3.5" x 3"

The Kohler Genuine Part GP1083167 Silent Fill Valve Kit is a manual valve type that provides a quiet filling experience. With multiple fill rate inserts, it optimizes performance while conserving water. It is adjustable to accommodate any height and is designed for Kohler Class Five toilets. To ensure the correct part, confirm the shank color, and use this part for black shanks and GP1138930 for grey shanks. With its easy installation process, you can quickly upgrade your toilet's flushing system.

What We Like
Easy installation
Cost-effective replacement
Includes necessary parts
Improved performance
Quiet operation
What We Don't Like
Hose may be too short
May not fix all issues
#TOP 4

Kohler 2" Toilet Flush Valve Kit

85406
Colors may vary
Single
Kohler 2" Toilet Flush Valve Kit Cover
Kohler Part 85406 2" Toilet Flush Valve Kit, Colors may vary

The Kohler 2" Toilet Flush Valve Kit is designed to optimize the flushing performance of various Kohler toilets, including Wellworth and Highline models. The kit includes a flush valve, 2" flapper, triangle gasket, and bolts. It replaces the black flush valve with a red flapper and is a genuine Kohler part. It is easy to install and ensures efficient flushing.

What We Like
Easy installation
High-quality genuine parts
Durable and effective seal
Good instructions and diagrams
Restores toilet functionality
What We Don't Like
Expensive for what it is
Does not include screws
#TOP 5

Kohler Silent Fill Toilet Fill Valve Kit

GP1138930
Colors may vary
12.5" x 3.5" x 3"
Kohler Silent Fill Toilet Fill Valve Kit Cover
KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts

The Kohler Silent Fill Toilet Fill Valve Kit is a genuine part that fills your tank quietly and provides a gracious experience. It comes with multiple fill-rate inserts that optimize performance and conserve water. The kit is adjustable to accommodate any height and is compatible with various Kohler toilets. Just confirm the shank color to determine the correct part.

What We Like
Easy installation
Quiet operation
Adjustable float mechanism
Durable and reliable
Includes color-coded restrictors
What We Don't Like
Not completely silent
Some assembly parts may underperform
#TOP 6

Korky 528MP QuietFILL Platinum Fill Valve

528MP
Black
Korky 528MP QuietFILL Platinum Fill Valve Cover
Korky 528MP QuietFILL Platinum Fill Valve-Fits Most Toilets-Easy to Install-Made in USA, Universal 99%, Black

The Korky 528MP QuietFILL Platinum Fill Valve is a universal replacement for ballcocks and worn-down valves to keep your toilet running smoothly. It is easy to install with its twist-lock adjustment, and adjustable from 7.75'' to 13.5''. The package includes a fill valve, refill tube, metal refill tube clip, mounting nut, cone washer, refill adjuster, coupling nut, tamper-proof key, and instructions. Korky's toilet repair parts are universal and specific to both older and modern toilet models, and made from long-lasting chlorazone red rubber.

What We Like
Easy installation
Quiet operation
Fast tank filling
Space-saving design
Quality customer support
What We Don't Like
Minor leakage issues
Potential early replacement needed
#TOP 7

LASCO 04-2108 Toilet Flush Valve

04-2108
White
LASCO 04-2108 Toilet Flush Valve Cover
LASCO 04-2108 Toilet Flush Valve Mansfield 2-Inch Plastic Rounded Body with Unit Raises Up To Flush

The LASCO Toilet Flush Valve is a complete kit designed to help you easily replace worn flush valves in your toilet. This replacement unit is compatible with most 2-piece toilets featuring a 2-inch plastic thread, making it a versatile choice for many users. It effectively prevents water leaks caused by broken or old components, ensuring a more efficient toilet operation. With all necessary components included, you can quickly install the valve without hassle, saving you time and effort in your plumbing tasks.

What We Like
Increases water volume flush
Easy to install
Significant flush improvement
Cost-effective solution
What We Don't Like
Fragile parts during installation
#TOP 8

Fluidmaster 507AK PerforMAX Toilet Flush Valve Repair Kit

507AK
Black/Red
2 Inch
Fluidmaster 507AK PerforMAX Toilet Flush Valve Repair Kit Cover
Fluidmaster 507AKP7 PerforMAX Universal High Performance 2-Inch Toilet Flush Valve Repair Kit with Gasket and Bolts

The Fluidmaster 507AK PerforMAX Toilet Flush Valve Repair Kit enhances your toilet's power with its high-performance 2-inch toilet fill valve. The kit includes bolts and gasket to replace old or inefficient fill valves and optimize flush performance. The universal design replaces any two-piece toilet flush valve and is ideal for use in 3.5 gallons per flush toilets. The 502 2-inch flapper features corrosion/hard water-resistant materials. You can easily install it in 10 minutes or less to get your toilet flushing like new again.

What We Like
Complete repair kit included
Easy installation process
Sturdy materials used
Effective in stopping leaks
Good value for price
What We Don't Like
Instructions lack overflow pipe guidance
Additional tool purchase may be needed
#TOP 9

Korky 528 Toilet Fill Valve

Black
Universal
Korky 528 Toilet Fill Valve Cover
Korky 528 Toilet Fill Valve, Universal, Black

The Korky Fill Valve is a universal replacement for ballcocks and worn down valves for different types of 2-piece and 1-piece toilets. It's easy to install with a twist-lock adjustment that makes installation the easiest when doing toilet repairs. The valve is adjustable from 7.75'' to 13.5'', and it includes a refill tube, metal refill tube clip, mounting nut, cone washer, coupling nut, tamper proof key, and instructions. Korky is a high-quality brand that produces universal and specific toilet products for both older and modern toilet models. All repair parts are easy to install and made exclusively from long-lasting chlorazone red rubber. With the Korky Fill Valve, you can keep your toilet running smoothly and avoid any unnecessary repairs.

What We Like
Easy installation
Quiet operation
Fast filling
Adjustable settings
Affordable price
What We Don't Like
Potential compatibility issues
Average noise level
#TOP 10

KOHLER GENUINE PART Toilet Flush Valve Kit

1188999
Unfinished
KOHLER GENUINE PART Toilet Flush Valve Kit Cover
KOHLER 2" Toilet Canister Flush Valve Kit, GENUINE PART 1188999, Compatible with KOHLER Cimarron Tank, 3" Canister with a 2" Outlet

This KOHLER GENUINE PART 1188999 2" Toilet Canister Flush Valve Kit features a 3" canister with a 2" outlet that utilizes gravity to optimize flush performance. It is compatible with KOHLER Cimarron tank model K-4421, and the tank model number can be identified by looking inside the back wall of the toilet tank. The number printed on the canister is a component number of this kit.

What We Like
Identical to original part
Easy installation
Works effectively
Good compatibility with specific models
Cost-effective compared to retailers
What We Don't Like
May require additional tools
Potential design longevity concerns
Buying Guide Image

The Right Toilet Flush Valves for You

Introduction

Picking the right toilet flush valve for your bathroom can be a daunting task. With so many options on the market, it can be hard to know which one will be the best fit for your home. In this article, we will provide some useful tips to help you make an informed decision.

Types of Toilet Flush Valves

Before we dive into the specifics of choosing a toilet flush valve, it's important to understand the different types that are available. There are two main categories of toilet flush valves: manual and automatic.

Manual flush valves are the most common type. They are typically operated by a lever or button on the side of the toilet, and they allow the user to control the amount of water that is released into the toilet bowl.

Automatic flush valves, on the other hand, are activated by a sensor. When the user approaches the toilet, the sensor detects their presence and automatically releases a predetermined amount of water into the bowl. These types of flush valves are more expensive than manual ones, but they offer the convenience of hands-free operation.

Factors to Consider

When choosing a toilet flush valve, there are several factors you should consider. First and foremost, you need to make sure that the valve is compatible with your toilet. Different toilet models require different types of flush valves, so be sure to check the manufacturer's specifications before making a purchase.

Another important factor to consider is the water efficiency of the flush valve. Most toilets use a lot of water, so choosing a flush valve that is designed to conserve water can help reduce your utility bills and reduce your environmental impact.

You should also think about the size of the flush valve. In general, larger flush valves can handle more waste and will require fewer flushes to keep the toilet clean. However, larger flush valves can also be more expensive, so it's important to find a balance between cost and performance.

Finally, consider the durability of the flush valve. A high-quality flush valve will last longer and require fewer repairs over time, so it's worth investing in a product that is built to last.

Conclusion

In conclusion, choosing the right toilet flush valve is an important decision that can have a big impact on your bathroom. By considering the factors outlined in this article, you can make an informed decision and pick a flush valve that will meet your needs and provide years of reliable performance.

Frequently Asked Questions (FAQs)

1. How do I know what toilet flush valve I need?

To determine the size of the toilet flush valve you need, you can visually inspect the opening in the tank. If it is about the size of a baseball or orange, you need a 2-inch flapper. If it is about the size of a softball or grapefruit, you need a 3-inch flapper. This will ensure the proper fit and functioning of the flush valve.

2. What are the different types of toilet flush valves?

Toilet flush valves come in various types, including standard, 3-inch, 4-inch, tower-style (also known as canister-style), and dual flush valves. Each type has its own design and features, catering to different toilet models and requirements. It is important to choose the right type of flush valve that is compatible with your toilet for optimal performance.

3. Are toilet flush valves universal?

While there are different types of toilet flush valves available, most flush valves are interchangeable. The compatibility of a flush valve depends on the size of the flush hole in the toilet tank, which is determined by the porcelain manufacturer. It is important to ensure the proper sizing and compatibility for a successful replacement.

4. What is the life expectancy of a toilet flush valve?

The lifespan of toilet flush valves can vary depending on factors such as part quality, frequency of use, temperature changes, and maintenance. On average, toilet seals and valves can last anywhere from 5 to 10 years. Regular inspection and maintenance can help identify any issues and extend the life of the flush valve.

5. How often do you need to replace a flush valve?

The flush valve in a toilet typically lasts around 6-7 years, while the fill valve may last 4-5 years. However, it is important to note that the parts in a toilet may need replacement periodically, while the actual bowl remains in place. Regular maintenance and inspection can help determine when it is necessary to replace the flush valve.

6. Do I have a 2 inch or 3 inch flush valve?

To identify the size of your flush valve, you can look at the size of the drain opening at the bottom of the toilet tank. If the opening is approximately the size of an orange or baseball, you need a 2-inch flush valve. If it is more like the size of a grapefruit or softball, you require a jumbo 3-inch flush valve.

Editor's Notes

During our toilet flush valve research, we found 24 toilet flush valve products and shortlisted 10 quality products. We collected and analyzed 189,009 customer reviews through our big data system to write the toilet flush valves list. We found that most customers choose toilet flush valves with an average price of $20.73.

The toilet flush valves are available for purchase. We have researched hundreds of brands and picked the top brands of toilet flush valves, including Fluidmaster, KOHLER, Korky, LASCO. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Harry Stack Avatar

Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.

Toilet Flush Valves Comparison Table

#TOP1
#TOP2
#TOP3
#TOP4
#TOP5
#TOP6
#TOP7
#TOP8
#TOP9
#TOP10
Brand Fluidmaster KOHLER KOHLER KOHLER KOHLER Korky LASCO Fluidmaster Korky KOHLER
Item dimensions L x W x H 3.35 x 4.33 x 13.19 inches 14.38 x 5.75 x 5.63 inches 11.75 x 3.75 x 3 inches 11 x 6.5 x 3 inches 13 x 3.5 x 3 inches 3.25 x 5.5 x 14 inches 3.45 x 12.2 x 3.45 inches 23.5 x 5 x 14.5 inches 4 x 2.25 x 7.75 inches 5.5 x 14.35 x 5.75 inches
Inlet Connection Type Fill Barb Female Iron Pipe Barb Fill Fill Threaded Barb Fill Barb
Material Plastic, Rubber Plastic Plastic - Plastic, Metal Plastic, Rubber Plastic Plastic, Rubber Plastic -
Valve Type Toilet Fill Valve flush valve silent fill valve flush valve - - flush valve flush valve Float Valve flush valve
Inlet Connection Size 0.75 Inches - - 2 Inches 0.88 Inches 0.88 Inches 2 Inches - 0.5 Inches 2 Inches
Outlet Connection Type Compression Barb - - Fill NPT Flange - Flange Barb
Outlet Connection Size 0.75 Inches 3 Inches - - 0.88 Inches 0.88 Inches 2 Inches - 0.5 Inches 2 Inches
Exterior Finish - black brushed - White Metal,Rubber - - Metal,Rubber Plastic
Global Trade Identification Number - - 00650531688415 00040688884073 - - 00052151220219 00039961009364 00749306528022 00885612120465
Number of Ports 2 1 - - 2 2 1 - - -
FTB Score
ftb score rating icon 9.9
ftb score rating icon 9.8
ftb score rating icon 9.6
ftb score rating icon 9.5
ftb score rating icon 9.3
ftb score rating icon 9.1
ftb score rating icon 8.9
ftb score rating icon 8.7
ftb score rating icon 8.5
ftb score rating icon 8.4
Where to Buy