Choosing the Top 8 Best Dual Flush Toilet

A Dual flush toilet is a toilet that uses two buttons or two different user-controlled operations for flushing away the toilet waste.

Before the assessments of the Top 8 best dual flush toilets, take a look at need-to-know things when choosing to avoid making any mistakes!

Bowl Height And Shape

The height and shape of the toilet bowl are among the first factors that we need to consider when choosing flush toilets. Do you know the reason why?

Because they affect directly the sitting posture and your coziness when using the toilet. Undoubtedly, you have to use the toilet thousands of times, and an unsuitable one will discomfort you a lot.

As usual, the standard American height of the toilet bowl is about 15 inches. However, many people suppose that a 16 to 17-inch tall bowl is the more surpassed choice as it will be better for the spine and more convenient for people with osteoarthritis, limited mobility, or the elderly.

The toilet seats have many shapes such as O-shape(round toilet), V-shape(elongated toilet), U-shape, and Square shape. Among them, round-front toilets and elongated toilets are the most popular.

The round front toilet fits small spaces and is less expensive than the elongated one. On the other hand, the elongated toilet makes the user feel more comfortable when using it and has an easy-to-clean design.

Choosing the toilet bowl’s height and shape depends on the needs and preferences of each person. Sitting on them is an excellent method to make sure they are appropriate and worth buying.

Water Usage

Water savings is an issue that everyone cares about, as squandered water consumption can set your family’s monthly water bill to skyrocket!

They are called dual flush toilet because it integrates two ways to flush water to help you control the gallon of water of each use. You can choose to use 0.84 gallons or 1.68 gallons per flush (3 or 6 liters per flush).

Also, there is some lasted model; their amount of water per flush is reduced to 0.728 gallons (2.6 liters) or 1.12 gallons (4 liters).

Mount Type

How many designs of toilets can you choose? Hundreds of different designs!

However, toilets dual flush is categorized into three mount types: a one-piece toilet, a two-piece toilet, and a wall-mount toilet.

A two-piece toilet is the most popular in the USA. It has a traditional design with two separate parts: the bowl and the tank. They will be attached when installed.

One-piece and wall-mount toilets have one part only and fit well in small spaces. Mainly, the wall-mount toilet includes two forms: the back-to-wall and the wall-hung toilet.

Flushing Mechanism

Dual toilets use a system call as a siphonic booth to increase the water pressure. There are two main types of flushing structures: gravity flush and pressure-assisted flush.

The sooner uses a large water weight and discharges rapidly, which creates pressure to push waste into pipes and out-this structure pretty much little noise.

The latter is more modern. In addition to water, it includes compressed air in the tank. When you press the flush button, the water weight and air pressure push the waste out.

Top 8 Rated Best Dual Flush Toilet

TOTO MS992CUMFG#01 dual flush toilet

TOTO is one of the oldest brands in the US and is extremely famous for its high-end segment sanitary devices.

TOTO MS992CUMFG#01 Dual flush toilet is a specific product for the integration of modern technology. If you prefer automation, modernity, and luxury, this product won’t disappoint you.

This smart toilet has an automatic opening and closing mechanism, thanks to the proximity sensor. When you go to the toilet, the toilet lid will turn on, and there are LEDs at night.

It also has a mode to help you wash and dry after each use. Furthermore, it automatically flushes and cleans after you stand up and finish the use process. This makes users extremely excited because it helps deodorize effectively!

Last but not least, this TOTO single-piece toilet’s skirted design saves you a lot of time scrubbing and keeping it clean.

Conversely, because of its advanced technology and modern design, its price is relatively high compared to the conventional standard. Anyway, you’ll get what you pay for!


  • Advanced technology
  • Luxurious and modern design
  • Automatic operation
  • Saving water (1 gallon per flush)
  • Easy to clean and deodorize


  • Need to be connected to the power source
  • A little pricey


KOHLER K-3987-0 dual flush toilet

If you don’t have too much space for a toilet, then KOHLER K-3987-0 will be the option that makes you satisfied. As although it is a two-piece toilet, it is designed to take up the least space with a round-front bowl.

KOHLER K-3987-0 possesses a technology called Class Five flushing that helps water be discharged into tanks from multiple sides with faster speed and higher thrust.

Its advantages contribute to optimally cleaning up waste and limit the situation of being clogged effectively.

Another characteristic of this product is the lever. Other products on the market often have dual buttons for you to choose the amount of water, but it can be a challenge for someone who has problems with the finger joints or is not familiar with using them.

With the lever design with two different water levels, you can drain water more conveniently. That makes life easier!

Despite its outstanding features, somebody complain about the bowl height – just from 14.5 to 15 inches, which is difficult for the elder or disabled to use.


  • Suitable for small space
  • Prevent being clogged
  • Convenient lever design
  • Strong water flow


  • Uncomfortable bowl height
  • Non-skirted design


American Standard 2887.216.020

This is another two-piece toilet designed with advanced flushing technology, and it comes from the American Standard brand.

American Standard 2887.216.020 flushing system has been innovated to save more water and better fulfill its duty in each flush. The water weight creates a huge thrust thanks to the robust engine, and the sides of the bowl are steep.

Furthermore, the siphonic flush system with a dual exhaust valve formed by H2Option technology will significantly reduce your monthly bill. Namely, you only use 1 to 1.6 gallons of water for a single discharge of liquid or solid waste.

If you only have a small area and not too big a budget for a toilet, then considering this product is what you should do. Although it is a two-piece toilet, American Standard 2887.216.020 has a relatively neat design.

Compared to KOHLER K-3987-0, this product features an elongated bowl design that will make you more comfortable sitting.

Sometimes, you may have a problem with the flush button because it is relatively easy to get stuck, and you may have to press it twice.


  • Siphonic system
  • Powerful flow
  • Save water
  • Elongated bowl
  • Neat design


  • Buttons are easy to stick.


Swiss Madison SM-1T254 dual flush toilet

best dual flush toiletCompared to other water-saving products in the same segment, this Swiss-brand toilet uses even less water. You only need to spend 0.8 or 1.28 GPF.

Belonging to the one-piece toilet, the Swiss Madison SM-1T254 has an elegant, simple but sophisticated design. That allows you to place it in your toilet no matter what your toilet’s style is.

Skirted designs reduce your cleaning time and make everything easier. With toilet cleaner liquid and tools, you can remove the stain from the bowl’s surface like a piece of cake.

The seat of this product can be installed and removed incredibly simply. You just need to press and hold the button at the joint of a seat and bowl to finish.

It will be a challenge if you install it on your own. We recommend that you ask a skilled plumber to install it for you to save time and avoid errors.


  • Best of water-saving
  • Elegant design
  • Easy to clean
  • Soft and easy-to-remove seat


  • Difficult and need space to install


TOTO MS446124CEMG#01 dual flush toilet

Cefiontect pottery is the pride of this product. Made of high-quality material, TOTO MS446124CEMG ​​#01 minimizes surface contamination, reducing the number of clean-up times required.

With the elongated bowl design and the ideal height of the bowl (17 inches with a seat), you will feel comfortable and satisfied when using it.

Besides, it has a robust monolithic design, which means you don’t have to replace another one after a use period as this product ensures a long life span.

It consumes as little water as the Swiss Madison SM-1T254 is 0.8 and 1.28 GPF. However, it didn’t seem to have enough strong water force. Many users are quite dissatisfied with this product’s weak water force which makes them press the button twice.


  • Easy to clean and limit dirt sticking
  • Elongated bowl
  • Solid monolithic design
  • Water-saving


  • Weak water flow


American Standard 2889218.020

The height of 16-1/2″ of American Standard 2889218.020 is appreciated as the best and most ideal bowl height for a sense of comfort.

It’s also suitable for your home if there is anyone who has to struggle with knee arthropathy, who is elder and disabled.

The flush force of this product is relatively robust, so you can eliminate all waste after one press thanks to the towel flush valve and EverClean bowl.

Porcelain parts and components are warranted for a lifetime, and machine parts are warranted from manufacturers for up to 5 years. You will not have to worry about tar exchange or repair if there are any problems with the toilet

You don’t need to worry about the harmony of the toilet’s color and your bathroom as you have diverse options when buying this product. Three colors: white, bone, and linen will fit perfectly with your home wall color.

Besides, do you prefer a round or elongated bowl? No matter which type you like, it can meet your requirement!

This product is sold without a seat. That means you have to pay extra to buy a seat and attach it to the bowl.


  • Comfort height
  • Powerful flow
  • Various options
  • Long time Warranty


  • The seat is sold separately.


WoodBridge T-0020 dual flush toilet

We bet you will be impressed and surprised by the design of this product the first time you see it! It has a luxurious, elegant, and modern look that can make you feel it’s the toilet of the future.

If you are keen on a spacious and comfortable toilet, why don’t you learn more about this WoodBridge square toilet?

The high-end closing seat of this toilet contributes to its high class and is much more worthwhile. Additionally, it’s more and more popular thanks to the comfortable feeling it brings to the user.

As usual, noise is probably something that no one likes. Then we believe that you will be satisfied and there is no need to worry about the noisy sound of water flush because it works smoothly and silently.

Because of its unusual and uncommon design, you need a plumber to install it and remember to check it carefully. We make sure that no one likes sitting on an unbalanced toilet like a seesaw.


  • Luxurious and stylish design
  • Large and soft-close seat
  • Operate smoothly and silently


  • Difficult to install

Swiss Madison SM-1T106

best dual flush toilet

Apart from the popular round or elongated bowl, what do you think about a square toilet? The purchase of a square bowl can give your toilet a more eye-catching and novel look.

Undoubtedly, seamless porcelain materials and skirted design will save you a lot of time and money on cleaning up. And yes, making an effort to clean is unnecessary.

Being among the top toilets that use less water, but its water force is big enough that there will not be any plaque on the bowl after a flush.

Many users have commented that instead of being 17 inches tall, its actual height is only 15 inches a bit more. It’s standard, but you may not be satisfied with this height if you’re tall or have knee problems.


  • Square toilet with a larger bowl
  • Seamless porcelain materials
  • Don’t need to spend much time cleaning
  • Powerful flow


  • Hard to install
  • Not an ideal height


What Is The Dual Flush Toilet?

A dual-flush toilet is an upgrade compared to conventional toilets. It comprises two dual flush buttons with different amounts of water to use, which are contingent on discharging the liquid or solid waste to save water.

What Is The Right Size Of A Dual Flush Toilet?

Firstly, you should consider the bowl height. The bowl will be about 15 to 17 inches above the floor. However, it varies slightly depending on the design of each product or user object.

For example, toilet bowls for the elderly disabled, or wheelchair user is 17-19 inches high to help them use them more conveniently and easily. Or toilet bowls customized for kids are usually under 15 inches.

Next, check the bowl size: width, and length. As mentioned above, the two most common types of dual flush toilet bowls are round and elongated toilets. Do you know what their differences are?

The round bowl’s dimension is about 14 to 15 inches wide and from 16 to 17 inches long. Compared to the round bowl, the elongated bowl has the same width. However, it is slightly longer. Specifically, the length of the elongated bowl ranges from 18 to 19 inches.

There is not much difference between the two most common types. Many people judge that the elongated bowl will make you more comfortable when using it.

Anyway, try sitting on them when buying to get the most factual experience.

Should I Choose One-piece Or Two-piece Toilets?

The answer to this question is contingent on your toilet and your budget.

If you have ample space for your toilet and your budget is not too big, then two-piece toilets are the most appropriate choice. Because it is a bit bulky in size, but the price is lower than other types.

On the contrary, a one-piece toilet is suitable for small spaces. It has the advantage of a compact and easy-to-clean one, so it costs a bit higher.

Why Switch To Dual Flush Toilets?

A significant benefit it brings is saving money! You are wondering if its price is higher than the regular toilet, how it saves money? Don’t be hurried; keep reading to know why!

The extraordinary thing about dual flush toilets is that two flush modes help to save water. That will significantly reduce your monthly water bill!

Moreover, the dual flush toilet is structurally improved; its operation is upgraded to become more flexible and less damaged. Therefore, you don’t have to spend too much on repairs and warranties.

Are Dual Flush Toilets Easy To Install?

The installation is complicated a little, which will take relatively time and effort of an amateur.

To install a new dual-flush toilet, you need to consider the following main steps:

  • Measure the toilet area
  • Disconnect the plumbing and disassemble the old toilet
  • Install the new dual-flush toilet
  • Connect the water supply to the new toilet and check

That’s not all! There are many details and other small steps you must do. Hence, we highly recommend that you find a professional plumber to help you complete this work.

Which Dual Flush Toilet Is Easy To Clean?

In general, one-piece and wall-mount toilets have compact designs to make them easier to clean. But if you want to choose a two-piece toilet?

No matter which type of toilet you choose, consider choosing the skirted design bowls. The bowl’s surface will be flat and easily cleaned with toilet cleaners, pool cleaners, or other conventional detergents.

Final Verdict

Have you chosen the best dual flush toilets for your home? We hope the answer is yes!

When choosing toilets, pay attention to the bowl height and shape, which directly affects your feeling and satisfaction. One more thing to consider, if you don’t want to spend too much effort cleaning your toilet, a skirted design, and one-piece are the most appropriate choices.

Last but not least, try sitting on it before making a decision to buy!