Image: MomJunction Design Team
Going to the toilet should be a seamless experience, and the best toilet flush valves can help you make it one. These valves are positioned within your flush tank and are available in various sizes. Not every size is compatible with your toilet tank, so you need to be careful about what you buy.
The typical rule of thumb here is that the bigger the valve, the better the flow of water. The options we have listed here use much less water than traditional valves, which means you can save gallons, reduce your water bill, and be kind to the environment. Here are some time-tested picks that we recommend for your bathroom.
Top Picks
11 Best Toilet Flush Valves
1. Best With Solid Frame Flapper: Fluid master Flush Valves
Image: Fluidmaster 
Why We Think It's Worth Buying
The product boasts 29,383 reviews on Amazon, and many buyers have said they would purchase the product again.
This is the ideal solution to repair a noisy toilet. You can use Fluid master valves in 3.5 per gallon toilet flush or larger capacity. The tried-and-tested kit includes the most commonly used 400A fill valve. It contains a solid frame flapper that aligns with the tank drain and allows consistent power flush. Here’s a review video that explores a tester’s experience and demonstrates exactly how easy it is to install and use this product every day.
Pros
- Chlorine-resistant flapper
- Easy to use
- Highly durable
Cons
- Installation may not be easy
"Installing the fill valve was simple, following the easy instructions without using any tool. The performance is quite impressive, with a quiet refill and zero leakage. Also, the essentials included make fixing potential drips quite simple."
Quick tip2. Best Durable: American Standard Flush Valve
Image: American Standard Why We Think It's Worth Buying
More than 3,631 independent reviewers on Amazon have acknowledged the product's durability and functionality.
The American Standard replacement flush valve is a reliable option that consists of a seven-inch tube and a 3.4-inch chain and is a universal replacement for any Champion 4 flushing system. It is made of plastic and metal material and weighs one pound.
Pros
- Long-lasting
- Certified frustration-free
- Easy to use
Cons
- Instructions may not be clear
"I found this flush valve effective in reducing the non-stop water leakage in my toilet. I love how it fits and keeps the toilet functioning again without a fuss. A great product overall."
3. Best Compatible: Kohler Flush Valve
This canister toilet cistern valve is compatible with the K-4634 model of the Kohler Cimarron tank. It is Kohler’s original replacement part. The canister measures three inches with a three-inch outlet. The flush valve helps maintain Kohler toilets’ actual product performance. The item weighs 1.2 pounds. Watch this video to learn how to install the valve.
Pros
- Long-lasting
- Fully assembled
- One-year warranty
Cons
- Not suitable for one-piece toilets
"While I felt some parts were unnecessary, this Kohler's kit was handy for repairing my toilet. Installation was easy, offering a nice, snug fitting. I am also impressed by the durability of the material. Overall, a decent purchase."
Fluid master Flush Valves Best With Solid Frame Flapper | American Standard Flush Valve Best Durable | Kohler Flush Valve Best Compatible | |
|---|---|---|---|
| Material | Multi | - | Brass |
| Color | Multicolor | - | Original version |
| Dimensions | 3.71 x 6 x 15.76 inches | - | 10.8 x 3.5 x 3.5 inches |
| Weight | 9.6 ounces | 1.12 pounds | 1.2 pounds |
| Rating | |||
| Reviews | 29,383 | 3,631 | 3,598 |
| Price | $10.97 | $33.97 | $21 |
4. Best for Repairing Leaking Toilets: Next by Danco Flush Valve
Image: Danco Why We Think It's Worth Buying
The 1,133 positive customer reviews on Amazon are a testament to its quality and reliability.
Next by Dancois designed to accommodate standard flush valves from 2.5inches to 10.5 inches high. The pack includes a split handle with a powerful flush activator, but it is not compatible with Mansfield brand toilets. The dual water-saving flush valve converts a standard toilet into a two-button, dual-flush toilet. It offers a choice of full or low flush requirements. Suitable for all standard water closets, this flush valve repairs faulty toilet flapper, flapper chain, and toilet handle problems. Check out this review video that explores a reviewer installing and testing the valve.
Pros
- Easy-installation
- Durable construction
- Fits standard toilets
Cons
- Does not fit Toto ST454E
"Though installation is slightly tricky, the dual flush converter's effectiveness in water saving is worth the hassle, especially for my high-volume toilet model. Just be mindful of the adjustment for a proper fitting. Regardless, this efficient, eco-friendly option is worthwhile."
Did you know?5. Best Water-Efficient: Mansfield Flush Valve
Image: Mansfield The Mansfield flush valve is made of polypropylene and ABS material, which will not rust and corrode. The product weighs 0.4 pounds. You can use the flush valve to repair leaky toilets. This water-efficient flush valve replaces 208 and 209 models and allows you to stop the flushing mechanism midway to prevent potential overflow of water. The lightweight and overflow-preventing valve is easy to install.
Pros
- Energy-saver
- Instant shut-off
- One-year warranty
Cons
- May not last very long
"Replacing my previous worn-out flush valve with this new one was such a relief. It offered a solid seal with powerful flushing, making my toilet more efficient. Clearer guidance and a handy tank-bowl gasket could have improved its installation process."
6. Best For Flush Accuracy: Sloan Valve Flush Valve
Image: Sloan Valve Sloan flush valve is an exposed manual water closet flushometer valve, which uses para-flow technology to ensure low-consumption flush accuracy. This manual flush valve is made of copper and brass castings with a chrome finish. The flush volume starts with as low as 1.6 gallons of water to improve water efficiency.
Pros
- ADA compliant
- Adjustable tail-piece
- Three-year warranty
Cons
- May not be durable
"This durable, well-crafted flush valve has become an efficient replacement option for my toilet by saving water and tackling new buildups. Despite the initial instruction hurdles, it has served me well. Overall, a reliable choice that I would recommend."
7. Best For Hard Water: Korky Flush Valve
Image: Korky This is a universal toilet flush valve, compatible with most three-inch flush valves, and is easily adjustable with Toto, Mansfield, and other brands. The adjustable flapper adopts a flexible rubber design to achieve a tight seal on most flush valves. It solves problems such as toilet leaks, noise, or water refilling.
Pros
- Long-lasting
- Adjustable design
- Chlorine-resistant rubber
- Works with hard water
Cons
- May not work with American Standard toilet
"The kit is user-friendly enough for me to install it quickly. It offers a quieter fill, more powerful flushing, and reduces leakage and water wastage. Although the gasket seating needs time to settle, its effectiveness and compatibility make it worth it."
Quick tip8. Best For One-piece Closet Toilets: BQLZR Flush Valve
The BQLZR Flush Valve is only compatible with toilet tank holes measuring 2.56to 2.95inches. The valve has dimensions of 10.24x 10.63inches. Its design has a good sealing effect, adjusts the tank’s water levels, and is suitable for one-piece closet toilets.
Pros
- Water-saver
- Prevents leakage
- Durable construction
Cons
- May be difficult to install
"With some extra tightening and fixing, it took me only a few minutes to install this new valve unit in my toilet. So far, it's been working pretty well. Hence, I will recommend this as a reliable replacement option."
9. Best Easy-To-Install: WDI Technology Flush Valve
Image: Wdi WDI Technology replacement toilet flush valve has a two-piece toilet design to prevent leakage, and the flapper valve assembly is compatible with all three-inch flush holes. The flush valve comes in blue, green, and orange. The product weighs approximately 0.4 pounds.
Pros
- Provides ease of installation
- Lightweight
- Durable
- Long-lasting
Cons
- Not suitable for one-piece toilets
"This flush valve helped relieve the constant water running in my toilet. It perfectly snapped in, offering a proper fitting, exactly how I expected. I am pleased to see the reduced water bills."
10. Best With Adjustable Height: Plumb Pak Flush Valve
Plumb flush valve has 40 percent more efficient flushing using the same amount of water. This flush valve replacement can transform any poor flush toilet into an efficient toilet and is compatible with most standard toilets with a two-inch flush valve. Plus, this plastic flush valve supports height adjustments.
Pros
- Long-lasting
- Saves water
- Easy to install
Cons
- The chain may not be durable
"This valve's easy adjustability and universal fitting met my needs, offering a clog-free toilet with zero water wastage. However, for some models, a slight modification will be needed to get the desired performance."
11. Best with Sleek Look: EZ-FLO Flush Valve
The white toilet flush is made of high-quality plastic to ensure durability. EZ-FLO’s flush valve is designed for use in Eljer toilets. This commercial flush valve has a chrome finish, corrosion-, and rust-free handle and adds a touch of modern and sleek look to your toilet. The package includes flushing system components such as a plastic handle, a rubber float, and a flush valve.
Pros
- Durable
- Easy-to-install
Cons
- The chain is too small
"My new valve replacement is a reliable find with its precise fittings and hassle-free installation. It comes with additional pieces, which I will keep handy for future repair. I would recommend this."
Things To Consider When Choosing A Toilet Flush Valve
Before buying the best toilet flush valve, pay attention to the following points.
- Compatibility: Choose a toilet flush compatible with your toilet. There are many valves on the market that have a universal design. Before replacing, be sure to measure the size of the valve.
- Water saver: Most toilets are economical and use less than one gallon of water per flush. Choose flush valves with water-saving functions to minimize water usage and expenses.
- Installation: Replacing a flush valve can be a difficult task. Therefore, choose a product with easy-to-install features.
- Durability: When purchasing a flush valve, always pay attention to its construction. Ensure the valve is made of robust and high-quality materials that can withstand the test of time. The product should comply with ADA standards to avoid corrosion or rust.
Frequently Asked Questions
1. Does a toilet flush valve size matter?
A flush valve is a crucial part of the toilet as it moves the water from the toilet tank to the toilet bowl. The bigger the flush valve, the stronger the water pressure when a toilet is flushed.
2. How do I know if my toilet uses a two-inch or three-inch flush valve?
The size of a toilet flush valve may be determined by the inner diameter of the drain. If the measuring tape gives a reading of 1.8-2 inches, the toilet may have a two-inch valve. On the other hand, if the tape gives a reading closer to three inches, the toilet may have a three-inch valve.
3. Do most toilets have two-inch flush valves?
Yes, the standard size of a flush valve is two inches. However, toilets manufactured in recent years may have flush valves that are wider than two inches.
Why Trust MomJunction?
We bring you this list of the best toilet flush valves to improve your washroom experience. These consumer-tested valves have been chosen to help you save water, reduce your water bill, and ensure a clean toilet. To curate this list, we referred to numerous customer reviews and product ratings, and only those with the highest customer satisfaction have been listed here. We have also put together a buying guide to help you make an informed choice.
The Bottom Line
Now that you’ve scrolled through the above list, choosing the best toilet flush valve for your washroom shouldn’t be a hassle. The top time-tested options from the list include the Fluidmaster Flush Valve with chlorine-resistant flapper, the long-lasting Kohler Flush Valve, and the Sloan Valve Flush Valve with advanced para-flow technology. We recommend that you check their compatibility with the product in the toilet. Make sure the one you pick requires only a reasonable amount of water. It must have a smooth installation process and be comfortable to use. More importantly, the valve should be made from durable material so that it can be used for a more extended period without any issues.
Infographic: How To Install A Flush Valve?
A leaky flush valve can drain your water supply in no time. However, changing a flush valve can be pretty easy if you have simple tools like a wrench and a spanner. So gather a towel, a pair of gloves, and a new valve, and follow the infographic to change the flush valve without calling a plumber.
Illustration: Momjunction Design Team
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