Best Flapper Toilet Flush Valves of 2026

Harry Stack Avatar
Harry Stack
Last Updated: Jan 24, 2026

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Flapper toilet flush valves are an essential component of any modern bathroom. These valves are responsible for controlling the flow of water from the toilet tank to the bowl and ensuring that waste is efficiently flushed away. Flapper valves are available in different sizes and designs, making them suitable for a variety of toilet models and configurations. They are easy to install and maintain, ensuring that your toilet remains in good working condition for years to come. With their durable construction and reliable performance, flapper toilet flush valves are a smart investment for any homeowner.

At a Glance: Our Top Picks

Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit Cover #TOP 1
Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit
ftb score rating icon 9.9
Fluidmaster 555CRP8 Toilet Flush Valve Repair Kit Cover #TOP 2
Fluidmaster 555CRP8 Toilet Flush Valve Repair Kit
ftb score rating icon 9.8
Fluidmaster Universal Toilet Flush Valve Repair Kit Cover #TOP 3
Fluidmaster Universal Toilet Flush Valve Repair Kit
ftb score rating icon 9.6

Top 5 Flapper Toilet Flush Valves

#TOP 1

Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit

K-400A-5004
Multi
2- Pack
Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit Cover
Fluidmaster K-400A-5004 Universal Toilet Fill Valve and 2 in. Toilet Flapper Repair Kit

The Fluidmaster Toilet Repair Kit is a convenient solution for fixing cracked fill valves and running toilets. With its universal design, it fits most 2" flush valve toilets, making it versatile and easy to install. The 400A toilet fill valve can be adjusted in height from 9 in. to 14 in. to accommodate different tank sizes. This kit also includes a solid frame flapper that resists twisting, ensuring a secure seal. The durable build of the kit provides peace of mind, and it comes with a 5-year warranty. With the Fluidmaster Toilet Repair Kit, you can quickly and effectively repair your toilet, saving you time and money.

What We Like
Universal design
Easy to install
Adjustable fill valve height
#TOP 2

Fluidmaster 555CRP8 Toilet Flush Valve Repair Kit

555CRP8
Black
2 In.
Fluidmaster 555CRP8 Toilet Flush Valve Repair Kit Cover
Fluidmaster 555CRP8 Universal PerforMAX 5 Minute Toilet Flush Valve Repair Kit 2 In.

The Fluidmaster 555CRP8 Universal PerforMAX 5 Minute Toilet Flush Valve Repair Kit 2 In. is a fast and easy-to-install universal design that replaces inefficient toilet flush valve designs. The Peel and Stick design eliminates messy glue, with no tank removal. The kit includes a PerforMAX Adjustable Water-Saving Flapper, which helps you save water and money. The product is durable and made with corrosive resistant materials. It can be used to fix worn, leaky toilet flapper designs and fits 2” flush valve replacement kit, from 1.28 HET to 3.5 gallon per flush designs.

What We Like
Fast and easy-to-install
Peel and Stick design eliminates messy glue, with no tank removal
PerforMAX Adjustable Water-Saving Flapper included to help save water and money
Durable build with corrosive resistant materials
Universal design to replace inefficient toilet flush valve designs
#TOP 3

Fluidmaster Universal Toilet Flush Valve Repair Kit

K-540A-015-T5
Multicolor
No Size
Fluidmaster Universal Toilet Flush Valve Repair Kit Cover
Fluidmaster K-540A-015 Universal 3-Inch Toilet Flush Valve Repair Kit with Toilet Tool Multicolor

Upgrade your toilet's performance and fix leaks with the Fluidmaster Toilet Repair Kit. This kit includes a 3-inch flush valve and a helpful toilet tool for easy installation. With its universal design, it replaces most 3-inch flush valves, including popular brands like Toto and American Standard. The adjustable flapper allows you to customize water usage, helping you save water and reduce your utility bills. Additionally, the adjustable flush valve height ensures compatibility with various tank sizes. The durable silicone seal and corrosion-resistant materials guarantee long-lasting performance. With a 5-year warranty, this kit is a reliable solution to restore your toilet's flush performance.

What We Like
Fixes leaks and restores flush performance
Universal design fits most 3-inch flush valves
Customizable water usage with adjustable flapper

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
#TOP 5

3-Inch Dual Flush Valve Replacement Kit

houpeoro
HP0020
Black and Gray
3 Inch
3-Inch Dual Flush Valve Replacement Kit Cover
3-Inch Dual Flush Valve Replacement Kit for 2-Piece Toilets, Universal Toilet Repair Kit with Push Button, Fill Valve, Gasket & Bolts,Compatible with Glacier Bay, Kohler, American Standard, and Toto

Features
[Dual Flush Valve – Eco & Powerful] Upgrade Your Toilet With This Toilet Flusher Replacement Kit Featuring Full And Half-Flush Options. Enjoy Powerful Waste Removal With The Full Flush Mode And Reduce Water Use (and Bills!) With The Half Flush Mode — Perfect For Everyday Light Flushing. Easily Adjustable Water Levels Let You Customize Performance And Maximize Efficiency For Both Solids And Liquids
[Wide Compatibility] Designed For Most 3-Inch Two-Piece Toilets (not For One-Piece Toilets). Fits Flush Valve Openings 3.2"–3.6" And The Tank Button Hole Diameter 1.9"–2.2".Please Check Our Size-Measurement Guide In The Images Before Ordering.Compatible With Glacier Bay, Compatible With Toto, WaterRidge, Kohler, American Standard, Aquasource, And More
[Restore & Boost Toilet Power — Say Goodbye To Leaks & Wobbling] Upgrade Your Toilet's Performance With This Toilet Repair Kit Inside Tank, Designed To Stop Leaks, Improve Flushing Power, And Eliminate Wobbling. Including A Toilet Flush Valve, Push Button, Toilet Fill Valve, Durable Mounting Bolts, And A Secure Tank-To-Bowl Gasket, It Quickly Fixes Common Issues Like Worn Flappers, Weak Flushes, And Unstable Tanks. This Dual-Flush Toilet Kit Restores Factory-Level Performance — Making Your Toilet Flush Like New Again Without Replacing The Entire System
[Please Note] This Toilet Parts Inside Tank Kit Fits Two-Piece Toilets With A 3-Inch Flush Outlet And Dual-Flush Button Only — Not Compatible With One-Piece Toilets. Please Refer To The Size Guide In The Product Images To Measure Your Flush Valve Before Ordering To Ensure Proper Fit. We Water-Test Every Kit To Guarantee Performance; Slight Moisture On The Parts Is Normal. Trim The Button Stem As Needed — Keep About 1/16 Inch(1mm) Of Clearance To Avoid Contact With The Flush Valve Button For Smooth, Reliable Operation
[Easy, Flexible Installation] This Toilet Tank Replacement Kit Is Designed For Fast, Easy To Install And Maximum Flexibility. The Toilet Dual Flush Valve, Fill Valve Height (adjustable From 8"–13"), Push-Button Rod Length, And Overflow Pipe Height Can All Be Customized To Match Your Tank Setup, Ensuring A Precise Fit And Smooth Flushing`.Moreover, This Toilet Fill Valve Can Also Remain Silent During The Filling Process, Making Your Life More Comfortable And Quiet
[Durable Premium Materials] This Toilet Repair Kit Is Built With High-Quality ABS Components For Superior Durability And Stable Performance Under Varying Water Pressure. The Reinforced Flush Valve And Push Button Resist Corrosion And Wear, While The Extra-Thick Rubber Seal Creates A Tight, Secure Fit To Prevent Leaks And Extend The Life Of Your Toilet System
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Are toilet flapper valves universal?

Are all toilet flappers universal? No. There are universal designs like the Fluidmaster flappers that replace most other flappers and there are specialty flappers for specific flushing systems.

2. How do I know what size flapper valve I need?

Look at the flush valve drain opening at the bottom of your tank. If the opening looks about the size of a baseball or orange, you need a 2″ flapper. If the opening looks about the size of a softball or grapefruit, you need a 3″ flapper.

3. Are all toilet flapper valves the same size?

Flappers comes in two sizes, two inch and three inch. A majority of toilets will use the two inch flapper; however three inch flappers have become popular in recent years and can be found in newer toilets manufactured since 2005.

Editor's Notes

During our flapper toilet flush valve research, we found 24 flapper toilet flush valve products and shortlisted 5 quality products. We collected and analyzed 300,636 customer reviews through our big data system to write the flapper toilet flush valves list. We found that most customers choose flapper toilet flush valves with an average price of $19.43.

The flapper toilet flush valves are available for purchase. We have researched hundreds of brands and picked the top brands of flapper toilet flush valves, including Fluidmaster, Kohler, houpeoro. The seller of top 1 product has received honest feedback from 384 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.