Best Dual Flush Toilets – 2021 Best Options Reviewed

| Last Updated: December 27, 2021

A dual flush toilet is just like a normal flushing toilet; however, they give the user the option of two different flushing levels. A normal flush is used for solid waste, while a lighter flush that uses less water is intended for flushing away liquid waste. 

Having the option to choose how much water is released in your toilet’s flushing system helps cut down on household water consumption, which saves you money and helps protect the environment.

To help you choose the best option, we are going to review what we think are the best dual flush toilets on the market today. 

Comparison of the Best Dual Flush Toilets

IMAGEPRODUCT
  • Equipped with automatic air deodorizer
  • Gallons Per Flush: 1.0 / 0.8
  • Style: Two-Piece
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  • Sleek, modern one-piece design
  • Gallons Per Flush: 1.0 / 1.6
  • Style: One-Piece
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  • Best for the Money
  • Gallons Per Flush: 1.0 / 0.8
  • Style: Two-Piece
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  • Best Dual Flush One-Piece Toilet
  • Gallons Per Flush: 0.8 / 1.28
  • Style: One-Piece
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  • Best Kohler Dual Flush Toilet
  • Gallons Per Flush: 1.1 / 1.6
  • Style: Two-Piece
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  • Best American Standard Dual Flush Toilet
  • Gallons Per Flush: 1.0 / 1.6
  • Style: Two-Piece
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  • Best Toto Dual Flush Toilet
  • Gallons Per Flush: 1.0 / 0.8
  • Style: One-Piece
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Factors to Consider Before Buying a Dual Flush Toilet

If you are in the market for a new dual flush toilet, there are some important factors you should take into consideration. By considering the following factors, you will be able to find the perfect dual flush model for your needs:

Style

Just because your new toilet was designed to save water, does not mean it has to be ugly. Many of the latest dual flush toilets have really sophisticated designs that can complement the décor in your bathroom. Make sure you are choosing a dual flush toilet that matches your personal style!

Ease of Installation 

While installing a new toilet may seem like a complicated task, there are plenty of toilets that come with everything you need for installation, including detailed instructions. If you can install your new dual flush toilet yourself, you can save a significant amount of money.

Water Conservation Rating

One of the main reasons why people choose dual flush toilets over traditional flushing toilets is the fact that they help conserve water. Make sure that the new toilet you are purchasing actually has a good water conservation rating. The manufacturer should list how much water the toilet uses per flush. Some will even estimate how much water you will save in a year over a traditional toilet right on the packaging. Make sure you know how much each type of flush uses!

How Easy the Toilet is to Clean

Cleaning your toilet on a regular basis is really important. Not only do you need to clean a toilet regularly for sanitary reasons, regular cleanings will also prevent discoloration and premature fading. The best dual flush toilets have easy-clean surfaces, which can be wiped clean with any commercial cleaning product. Their smooth surfaces are also less susceptible to mold and the spread of bacteria than toilets with rougher surfaces.

Placement of the Flushing Buttons

Dual flush toilets tend to use buttons, rather than flushing levers. You should choose a toilet where the buttons are placed somewhere that is convenient to you. If you prefer more prominent top-mounted buttons, you should choose this type of toilet. If you would rather the buttons were more discreet, look for a dual flushing toilet where the buttons are located on the side of the water tank.

Key Terms to Know

To help compare products in this review, we have included a few key specifications for each. Here is a quick summary of what they mean.

  • Gallons Per Flush (GPF): How much water is used when the toilet is flushed. This can be a single metric or include two metrics in the case of a dual flushing toilet (which flushes differently depending on whether you are flushing liquids only or solids, as well).

  • Installation Method: Whether the unit attaches to the floor or the wall. 

  • One-Piece or Two-Piece: This is whether the toilet is molded as one unit or the tank and base are separate. 

  • Dimensions and Weight: The height, length, width, and physical weight of the toilet.

  • Material: The main material(s) the toilet is made of.

  • Seat Shape (round or elongated): The compatible seat shape.

Reviews of the Best Dual Flush Toilets

Now that you are aware of some of the factors that you should keep in mind when shopping for a new dual flush toilet, we can go over some of our top picks for the best dual flush toilets on the market today. Each of the following dual flush toilets was chosen because we believe they are outstanding options:

Best Overall

TOTO Aquia IV

TOTO MW4463046CUMG#01 WASHLET+ Aquia IV 1G Two-Piece Elongated Dual Flush 1.0 and 0.8 GPF Toilet with S500e Electric Bidet Seat, Cotton White

Specifications

Gallons Per Flush (GPF): 1.0 / 0.8

Installation Method: Seamless

One-Piece or Two-Piece: Two-Piece

Dimensions and Weight: 27.56 x 15.56 x 29.56″; ‎101.8 lbs

Material: ‎Vitreous China

Seat Shape: Elongated

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Review

The TOTO Aquia IV Dual Flush Toilet takes our top spot for the best overall dual flush toilet because it really has everything. Not only does it have two, water-saving flushes, it comes with everything else you could ever want from a modern toilet.

For starters, the built-in bidet works exceptionally well and is incredibly discreet. The innovative Wonder Wave technology provides a strong, yet gentle stream of water for sanitary purposes. The seat is also heated, which is great if you live in a cold climate and don’t like dealing with the shock of a cold toilet. One of the things we liked the most is the integrated deodorizer, which helps freshen the air around your toilet.

Bottom Line

The bottom line is this is one of the best toilets out there today. It offers absolutely everything you would want out of a dual flush toilet. The only issue is the price is a bit steep, but if you want the best, you cannot go wrong with the TOTO Aquia IV Dual Flush Toilet!

Pros

Heated seat for a more comfortable experience

Comes with a discreet bidet toilet seat with cordless integration

Luxurious modern styling compliments the look of any bathroom

Built-in air deodorizing keeps the toilet and your bathroom smelling fresh

1.0 and 0.8-gallon flushing options help conserve a significant amount of water over the duration of a year

Cons

It is considered a luxury-grade toilet, so it is fairly expensive

Runner-up

WOODBRIDGE T-0019

WOODBRIDGE Cotton White T-0019 Toilet

Specifications

Gallons Per Flush (GPF): 1.0/1.6

Installation Method: Floor Mounted

One-Piece or Two-Piece: One-Piece

Dimensions and Weight: 31 x 18 x 28″; ‎119.7 lbs

Material: ‎Porcelain

Seat Shape: Elongated

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Review

Woodbridge designs and manufactures all of its kitchen and bathroom products in California. Their toilets tend to have sleek and modern designs, which is certainly the case with their T-0019 Dual Flush Toilet.

The option between a 1.0-gallon flush and a 1.6-gallon flush allows you to save water, but the flushes are still powerful enough that you will not have to worry about clogging issues. We found the toilet is also really comfortable. If you are looking for a stylish dual flush toilet that is really easy to clean, we certainly recommend this unit from Woodbridge.

Bottom Line

If you are looking to cut down on water usage and install a modern-looking toilet that is both comfortable and stylish, you cannot go wrong with the Woodbridge T-0019 Dual Flushing Toilet. Its minimalist design is great for anyone that would like a modern-looking dual flush toilet.

Pros

Incredibly comfortable

Dual flush design helps conserve water

Luxurious and modern design catches the eye

Concealed trap-way and one-piece design makes it really easy to clean

Smooth surface is easy to clean and does not trap dust, dirt, mold, or bacteria

Cons

The primary flush is fairly loud

Best for the Money

TOTO Drake CST746CUMFRG#01

TOTO CST746CUMFRG#01 Drake Two-Piece Elongated Dual Flush 1.0 and 0.8 GPF Universal Height DYNAMAX TORNADO FLUSH Toilet with CEFIONTECT and Right-Hand Trip Lever, Cotton White

Specifications

Gallons Per Flush (GPF): 1.0 and 0.8

Installation Method: Floor Mounted

One-Piece or Two-Piece: Two-Piece

Dimensions and Weight: 27.38 x 17.31″; 105.8 lbs

Material: Vitreous China

Seat Shape: Elongated

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Review

The new Drake Two-Piece Dual Flush Toilet from TOTO is one of the most budget-friendly dual flush toilets we have ever seen. Given that TOTO has a reputation for selling the highest quality toilets on the market, it is really nice to see that they also offer an affordable option for those that are on a tighter budget.

Not only is it a great price, but this toilet also has some really useful features. The DynaMax Tornado Flush is really effective at eliminating waste and keeping the bowl clean. The option to only use a single gallon of water per flush is also really useful if you are looking to cut down on water usage.

Bottom Line

This classically-styled dual flush toilet from TOTO is a really great option for anyone that is looking for a dual flush toilet on a budget. It has a really powerful flush when you need it, or a lower pressure flush when you are looking to save water. The side-mounted lever gives it a traditional look and the slim, elongated design means it fits into even the most crowded bathrooms. Overall, it is an excellent option!

Pros

Very affordable price

Dual flush design helps conserve water

Patented DynaMax Tornado Flush swirls around the entire bowl

Has a traditional, two-piece look, which means it fits into any type of bathroom

Unique bowl design reduces water flow resistance and turbulence, which means a quieter flush

Cons

Does not include a toilet seat

Best Dual Flush One-Piece Toilet

Swiss Madison SM-1T254

Swiss Madison Well Made Forever SM-1T254 St. Tropez One Piece Toilet, 26.6 x 15 x 31 inches, Glossy White

Specifications

Gallons Per Flush (GPF): 0.8 / 1.28

Installation Method: Floor Mounted

One-Piece or Two-Piece: One-Piece

Dimensions and Weight: 26.6 x 15 x 31″; 120 lbs

Material: Ceramic

Seat Shape: Elongated

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Review

This stylish dual flush toilet from Swiss Madison is an excellent choice for anyone that prefers the look of a one-piece toilet. The seamless design means that it has a modern appearance and it is much easier to clean than a traditional two-piece toilet. The quick-release lid and seat also help with cleaning, while the slow close design stops the seat from slamming. The glazed trap-way also helps make the toilet easier to clean than most.

The choice between a 0.8 or a 1.28-gallon flush helps you conserve water. The top-mounted, chrome flush buttons also look great. We think the sleek design looks really nice and think it is the perfect toilet for anyone interested in contemporary design. To give the toilet an even more modern look, all of the bolts are held in small holes and covered with caps. While this is a great feature, it can make installation a little bit more difficult.

Bottom Line

One-piece toilets are not for everyone, but if you like the sleek appearance of an all-in-one unit, the Swiss Madison SM-1T254 St. Tropez One Piece Toilet is an excellent choice. You can even choose between three different colors, which lets you match the toilet to your existing fixtures and décor. Overall, it is an excellent one-piece, dual flush toilet that is available at a very reasonable price.

Pros

Available in three stylish colors

Dual ‘Tornado Flush’ 0.8 and 1.28 GPF options

Fully skirted trap-way makes it easier to clean

Includes a quick-release, soft closing seat and lid

Modern one-piece design looks great and is easier to clean than a two-piece toilet

Cons

Somewhat difficult to install

Best Kohler Dual Flush Toilet

KOHLER K-3987-0 WellWorth

KOHLER K-3987-0 Wellworth Two-Piece Round-Front Dual-Flush Toilet with Class Five Flush System and Left-Hand Trip Lever, White

Specifications

Gallons Per Flush (GPF): 1.1 / 1.6

Installation Method: Floor Mounted

One-Piece or Two-Piece: Two-Piece

Dimensions and Weight: 27-3/4 x 18 x 29-1/4″; ‎86.3 lbs

Material: Ceramic

Seat Shape: Elongated

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Review

KOHLER is known for making high-quality toilets at reasonable prices. The Two-Piece WellWorth Dual Flush Toilet is a great example of what KOHLER does best. It has a classic design and the two flushes are even controlled by a classic side-mounted lever, rather than buttons. The rounded design of the bowl means that the toilet has a smaller profile than an elongated toilet, so it is a great option if you are looking to save space.

Despite the fact that it uses relatively little water with each type of flush, the unique design means that the water actually generates a fairly significant amount of force, which helps remove waste very effectively. While it would have been nice if they had included a seat and lid, the fact that it is offered at such a great price more than makes up for it.

Bottom Line

KOHLER is one of the most well-known brands in the toilet industry, which is not a surprise when you consider how reasonably priced their products are. For a dual flush toilet, the KOHLER WellWorth offers outstanding value. If you like the classic look of a rounded, two-piece toilet, but you still want the water-saving benefits of a dual flush toilet, this is an outstanding option.

Pros

Choice of a 1.1 or 1.6-gallon flush

Available in three different colors

Backed by a one-year warranty from KOHLER

Class Five Flushing Technology’ uses gravity to create more flushing force with less water

Rounded bowl cuts down on the length of the toilet, which is ideal for smaller bathrooms

Cons

Does not include a toilet seat

Best American Standard Dual Flush Toilet

American Standard H2Option

American Standard 2887216.020 H2Option Dual Flush Elongated 1.0/1.6 gpf Toilet, White

Specifications

Gallons Per Flush (GPF): 1.0 / 1.6

Installation Method: Floor Mounted

One-Piece or Two-Piece: Two-Piece

Dimensions and Weight: 29.75 x 15 x 29.5″; 91 lbs

Material: Vitreous China

Seat Shape: Elongated

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Review

American Standard is one of the largest toilet manufacturers in North America. Their toilets usually feature traditional designs that are complemented with the most modern features. This elongated two-piece toilet features top-mounted flushing buttons, so you can decide how much water should be released with each flush.

We really like how easy it is to keep this toilet clean, as the smooth surface wipes clean with any commercial bathroom cleaning product. The patented ‘PowerWash’ interior stays cleaner for longer than you would find with other types of toilets. A built-in sanitary dam inside the bowl also helps keep it clean.

Bottom Line

If you are looking for a simple, yet effective dual flush toilet from one of the most well-respected toilet manufacturers in the world, you cannot go wrong with the American Standard H2Option Dual Flush Toilet. While the flapper is not the best, you can upgrade it to a higher quality option for under $20, so it should not be seen as a deal-breaker.

Pros

Color-matched bolt caps and hardware

Chrome plated, top-mounted flushing buttons

‘PowerWash’ rim and bowl scrub clean with every single flush

Sanitary dam inside the bowl helps cut down on mold and mildew

Much lighter than most dual flush toilets, which makes it easier to install

Cons

Flimsy toilet flapper needs to be replaced after about a year of use

Best Toto Dual Flush Toilet

TOTO Neorest 700H

TOTO MS988CUMFG#01 NEOREST RH Dual Flush 1.0 or 0.8 GPF Toilet with Intergeated Bidet Seat and EWATER White-MS988CUMFG, Cotton White

Specifications

Gallons Per Flush (GPF): 1.0 / 0.8

Installation Method: Floor Mounted

One-Piece or Two-Piece: One-Piece

Dimensions and Weight: 27.13 x 15.19 x 21.06″; 18.7 lbs

Material: Vitreous China

Seat Shape: ‎Elongated

Maximum Weight Limit: 123.6 lbs

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Review

This is one of the most unique toilets you will find anywhere. It has an extremely low profile, which gives it a very modern appearance. Despite its small size, it offers a wide variety of advanced features, including a built-in bidet seat. The bidet has plenty of different spray modes, including oscillating, pulsating, and solid sprays.

It has dual flush modes and it can conserve over 1 gallon of water per flush when compared to a traditional toilet. It even has an auto open and close lid and seat, which can be really beneficial to seniors and those with mobility issues. A gentle night light helps you navigate the bathroom at night. Hands-free flushing technology is another nice feature that makes it seem like a toilet from the future.

Bottom Line

If you are the type of person that enjoys buying the latest technology, the TOTO Neorest 700H Dual Flush Toilet and Bidet could be just what you are looking for. It offers just about anything you could ever want from a toilet, including water-saving dual flush options. Overall, it is an incredible toilet, just remember that it can be somewhat difficult to install.

Pros

Auto open and close lid

Incredibly lightweight compared to a traditional toilet

Tankless, low-profile design looks very unique and modern

Built-in bidet seat offers a variety of spray and temperature modes

TOTO’s unique ‘Cefiontect’ ceramic glaze keeps the exterior and interior surfaces clean

Cons

Unique design means it is more difficult to install than a traditional toilet

What is a Dual Flush Toilet and How Does a Dual Flush Toilet Work?

A dual flush toilet is a toilet that offers two separate flushing modes. They are intended to save water, as the user can opt to use a flush that releases less water when they are getting rid of liquid waste. When the user wants to get rid of solid waste, they can choose the flushing button or lever that releases more water. Over the course of a year, the simple act of using less water per flush when it is an option can save thousands of gallons of water!

How Do They Work?

A dual flush toilet uses a unique flushing mechanism that regulates water used in each type of flush. The dual flush valve is also called a toilet siphon and it can be controlled with a lever or a set of buttons. While it is possible to buy a dual flush valve for a traditional single flush toilet, most people prefer to just buy a dual flush toilet, as it tends to look better and be more cost-effective. 

While it may sound fairly complicated, dual flush toilets are actually fairly simple, which is why they are becoming so popular. In fact, some toilet manufacturers have started exclusively selling dual flush toilets, as they are far more eco-friendly than traditional single flush toilets.

How Do Dual Flush Toilets Compare to Other Toilet Types?

Here are some helpful comparisons when considering a dual-flush toilet.

Single Flush vs Dual Flush Toilets

Single flush and dual flush toilets are the two most common types, which is why it makes sense to compare the two. As the names suggest, the primary difference is the number of flush options for each toilet.

A single flush toilet only has one flushing type, which is almost always controlled with a traditional side-mounted lever. A dual flush toilet lets the user choose how much water they want to be released when they flush the toilet. They can be controlled with a lever, but most tend to have top-mounted buttons for the two flush types.

Dual Flush Toilet vs High Efficiency Toilets

Given that they are both designed to conserve water and save money on monthly utility bills, it makes sense to compare dual flush toilets to high efficiency toilets. The truth is, a toilet can get a high efficiency rating if it uses 1.26 gallons per flush or less.

This means both single flush and dual flush toilets can be considered high efficiency toilets. Most of the dual flush toilets you will see are also considered to be high efficiency toilets. This includes all of the toilets we reviewed above!

Top Brands in the Dual Flush Toilet Space

To help you become a more informed consumer, we are going to go over some of the top brands that manufacture dual flush toilets:

American Standard

American Standard is one of North America’s leading plumbing supply brands. They also manufacture a wide range of high-performance dual flush toilets. Their toilets range from traditional styles, to the most modern designs. The fact that the American Standard brand has been making toilets and plumbing supplies for over 140 years is a testament to the brand’s enduring quality. Most of their dual flush toilets have simple designs, but they work exceptionally well!

KOHLER 

KOHLER is known for making stylish and modern kitchen and bathroom products. Their dual flush toilets are usually made with eye-catching designs and they are usually made with eco-friendly, water-saving features. They are widely recognized for having some of the highest quality dual flush toilets on the market. Some of them even feature built-in bidets!

TOTO

TOTO toilets are known for their lasting quality. This is because the brand makes sure all of their bathroom and kitchen products are designed to be as durable as possible. When it comes to dual flush toilets, the brand also focuses on comfort and water efficiency, so they tend to have comfortable seats and use less water per flush than other brands. If you like the modern look, you will probably like what TOTO has to offer.

TOTO Neorest 700H

Price Points of a Dual Flush Toilet

To help you budget properly, we are going to go over some of the main price ranges for a new dual flush toilet:

$100 – $300

Dual flush toilets in this price range are considered to be entry-level options. They usually have a really basic design and do not have any of the extra features you would get with a higher-end dual flush toilet. It is also common for dual flush toilets in this price range to lack a seat and lid, so make sure you are aware of what your toilet comes with before you make a purchasing decision.

$300 – $450

This is considered to be the mid-range level for dual flush toilets. Typically, these toilets are made to a better standard and have useful features, like bacteria-resistant surfaces and powerful flushing forces. You can also find some really stylish dual flush toilets in this price range.

$450 +

Once you get over $400, you are into the high-end dual flush toilet category. These toilets usually have some of the more luxurious features, like extra-quiet flushes, built-in bidets, quiet-close seats, and more. They also tend to have the latest designs, so they look more stylish in a modern bathroom.

Conclusion

Buying a dual flush toilet can actually end up saving you a significant amount of money over the toilet’s lifespan. The fact that they can save you money on your monthly water bills and help you do your part for the environment makes them a worthwhile purchase. By choosing one of the dual flush toilets we reviewed above, you will know that you are buying a high-quality product that will continue to work great for many years to come.

Photo credit: familyhandyman.com

People Also Ask

Here are questions you may have.

How Much Water Does a Dual Flush Toilet Use?

In most cases, a dual flush toilet will use about 1.26 gallons per flush when you choose the higher volume flushing option. The lower volume flush will use about 0.8 gallons per flush. Given that some of the older toilets used over 2 gallons per flush, you end up saving a significant amount of water over the duration of a year.

Are Dual Flush Toilets Harder to Fix?

While dual flush. Toilets are slightly more complicated than traditional single flush toilets, they are not overly difficult to repair. In most cases, you should be able to fix any basic issues on your own. If you run into a larger issue, you can check on the warranty status of your toilet, or reach out to a plumber.

Are Dual Flush Toilets Harder to Maintain?

No, dual flush toilets are not any more difficult to maintain than any other type of toilet. As long as you are cleaning the toilet on a regular basis with the appropriate cleaning products, your toilet should stay in excellent shape for many years to come.

How Much Does a Dual Flush Toilet Cost?

Prices vary quite a bit with dual flush toilets. If you are just looking for a basic dual flush toilet that gets the job done, you can usually get a decent toilet for about $250. However, if you are interested in some of the more modern and luxurious features, like a built in bidet, you might need to spend closer to $500.

Welcome! We hope you’ll find the job costs of home improvement projects useful when you’re deciding whether to do a job yourself vs. hire a contractor. We’re the authors of 20 home improvement books, most notably Home Improvement for Dummies©, Bathroom Remodeling for Dummies©, Carpentry for Dummies©, Plumbing for Dummies©, and Painting and Wallpapering for Dummies©. Our most recent book Fix It and Flip It is in its second edition. We’ve appeared as home improvement experts on television programs such as CNN, Dateline, the Today Show, HGTV and many others.