Top 7 Best Dual Flush Toilets – Buyer’s Guide and Review

Many people today are interested in doing what they can to help preserve our environment.

This may seem like a big corporation problem, but there are actually many things an individual can do as well.

In addition to the standard recycling, reusing and reducing that many of us already do, you can easily make changes at home.

One easy step you can take at home and office is to install the best dual flush toilet.

best dual flush toilet

This is a toilet that is designed to save water. The idea is simple: there are 2 handles for flushing. One handle is for solid waste and the other is for liquid. Then, the user can choose the appropriate handle and the right amount of water is used.

Let’s take a look at some dual flush toilet reviews.

The 7 Best Dual Flush Toilets Reviews

1. American Standard H2Option Dual Flush Toilet – Best for Small Spaces

American Standard H2Option Dual Flush Toilet


If you live in a small space, then you know size does matter. The American Standard H2Option is a nice option if your bathroom or home is small.

American Standard is a well-known name in the bathroom industry and their top dual flushing toilets are designed to use 37.5% less water. This toilet is capable of getting rid of more waste while using less water to do so.

You will be happy to know that this dual flush toilet meets the EPA water sense criteria. As the user, you have the choice of using either the 1.6-gallon flush for solids or the 1-gallon flush for liquid waste.

Another feature of the H2Option that you will appreciate, is the pressurized rim. This means that water is collected and specifically dispensed at certain points under the rim to make sure the toilet is completely clean when you flush.

This toilet is also constructed with an EverClean surface. This feature is applied to the surface of the toilet and guarantees it will remain free of mold, mildew, algae, and fungus. Your toilet will look great for years.


  • Jet-powered siphon cleans the bowl with every flush
  • Speed-Connect system cuts installation time by up to 30%
  • The elongated bowl fits nicely in smaller spaces
  • A fully glazed bowl looks nice for years


  • Defective float cup needs replacing on some units
  • The flusher breaks easily and thus needs replacing
  • Customer service is not great

The American Standard H2Option Dual Flush toilet is a nice option if your bathroom is short on space.

2. WoodBridge T-0001 One Piece Toilet – Best for Easy Installation

WoodBridge T0001 one piece toilet


If you want a water-saving toilet that is relatively easy to install by yourself, the Woodbridge T-0001 is a nice option. This well-designed toilet is a nice buy.

A nice thing about this toilet is that it complements many different styles of decor. So, if you are renovating your bathroom, this toilet will fit right in.

A nice feature of the T-0001 is that it does not have any corners. This makes it very easy to clean. It is also known for its quiet, yet powerful flushing.

This toilet comes with a soft seat that is attached with stainless steel hinges. You will find that this toilet bowl is fully glazed and easy to keep clean. The company has included everything you will need for installation, including a special hand wrench tool needed for working the bolts in narrow spaces.


  • Pre-Installed toilet seat makes installation easy
  • Designed to go with many different interior styles
  • Easy to clean without any corners or edges
  • Soft seat is comfortable to sit on


  • The toilet height is not ideal
  • Buttons tend to break easily
  • Hard to find replacement parts

The Woodbridge T-0001 is a nice choice for a dual flush toilet if you prefer a soft seat.

3. TOTO CST416M#03 Aquia II 2-Piece Toilet – Best for Modern Design

TOTO CST416M03 Aquia II 2-piece toilet


TOTO is the originator of the two-flush toilet, so they know how to make a quality piece. If your house or living area runs toward a modern aesthetic, this toilet will fit right in.

TOTO CST416M#03 has water conserving design that allows using only as much water as you need to get a good flush. Their Dual Max flushing system ensures that it is right every single time.

You will notice the push button style of flushing, which is integrated very nicely into the system. This toilet is sleek. You also have the option to upgrade to a softer seat if you prefer.


  • Dual Max Flushing system is water-efficient
  • A soft seat upgrade is a nice option
  • Modern design is complementary


  • Lower water level makes it difficult to flush all the waste away
  • Must be cleaned with a toilet brush constantly to keep stains at bay

TOTO is a good choice if you have a modern bathroom design and want a sleek toilet to complete the look.

4. KOHLER K-3987-0 Wellworth Dual-Flush Toilet – Best for Non-clogging

KOHLER K-3987-0 dual-flush toilet


Kohler is another well-known name in the bathroom industry. They apply the same great thought and design of their regular toilets to their dual flush ones, too.

This toilet makes use of Kohler’s Class Five Flushing Technology. If you think this sounds pretty impressive, it truly is. This system guarantees that the toilet has amazing bulk flushing abilities. And since some dual flush toilets are known to clog with more solid waste, this is a nice feature to have.

This toilet is designed to allow water to come in from all sides. When this happens, the pressure increases and guarantees a perfect flush every time.

Another nice design feature to the Kohler is the use of the universal red seal. This is important because when the seal needs replacing, it will be easy for you to find in just about any hardware store.

Many users are happy to note that the toilet has a green and chrome lever. These are the indicators showing which flush to use for solids or liquids. The green lever is for liquids and the chrome for solids.


  • This toilet is easy to install with a few bolts
  • Class Five Flush Technology ensures a great flush every time
  • The seat is designed to help improve aim, helping to keep a bowl clean


  • The toilet is shipped in 2 pieces in different boxes
  • You need to hold the lever down for a complete flush

Overall, this toilet by Kohler is a good deal since it is not likely to clog with waste.

5. Convenient Height 20 inch Extra Tall Toilet – Best for Those with Mobility Issues

convenient height two-piece toilet


Everyone needs to use the bathroom. And if you have knee or other mobility issues, it can be hard to bend and sit and then get back up again.

This toilet will be a real help for those with mobility issues as it is made taller than normal. The 20” seat height is designed to be easier on those who need assistance, this toilet may qualify as a medical expense when doing your taxes, so be sure to check with your tax preparer.

In addition to being extra tall, the toilet is dual flushing and elongated. It is accepted by the California Energy Commission and the Board of Registration of Plumbers GPF.

The extra tall toilet means you don’t need to add extra seats to the one coming in the box; so, all members of the house can use the toilet easily.


  • Extra tall height is easier for those with mobility issues
  • May qualify as a medical deduction
  • Uses lower water levels for solid and liquid waste
  • Everyone in the house can use this toilet


  • Children may need a step stool to reach the toilet
  • Directions for installation are confusing

This Convenient Height-Extra Tall toilet is a nice consideration for those with knee issues.

6. Swiss Madison SM-1T254 – Best for Customer Service

Swiss Madison SM-1T254


If you are looking for a nicely designed dual flushing toilet that goes with any bathroom style, the Swiss Miss is a great choice.

This toilet is designed to go the distance. A modern design of this toilet gives it clean lines. It is also able to fit nicely into many different spaces.

Since it is also a dual flushing design, you can be sure that the environment is being cared for. This design ensures that you only use the water you need.

This toilet has a soft seat, which some people prefer over a hard one. Since the design is so sleek, there are special holes incorporated into the design to allow you to reach the bolts.


  • Great customer service to help you every step of the way
  • Toilets are designed to last
  • Includes bolt caps and wax ring


    • Sometimes you need to flush twice to clean out the bowl
    • Can be complicated to install

The Swiss Madison is a nicely designed dual flushing toilet with great customer service, which is good since installation can be tricky.

7. HOROW HWMT-8733 – Best for Compact Toilets

HOROW HWMT-8733 small toilet


If you are looking for a compact toilet to fit in a small space, look no further. The HORROW is intentionally designed for small spaces without sacrificing quality.

This toilet tank is engineered to be powerful, yet quiet. The flush is very efficient and has dual options depending on your waste. The toilet is easy to install and has a glazed, self-cleaning surface.

Another nice feature is that this toilet is a one-piece design. This makes it easier to install. The chrome buttons add a nice touch, too.

The HORROW is designed to be quiet, yet powerful; soft, yet easy to clean. If you have a small bathroom or a tiny home, this dual flushing toilet will fit very nicely.


  • Soft seat is easily removed for cleaning
  • Bolt covers are included
  • Customer service is very helpful
  • This toilet is very quiet


  • It can be hard to find replacement seats
  • Delivery of the toilet is slow

Buyer’s Guide to the Best Dual Flush Toilet

Since most people today are interested in doing their part to help the environment, this guide is a helpful resource in choosing the best dual flushing toilets. This is also a great opportunity to conserve water and it is an easy switch for any household to make.

How Dual Flush Toilets Work

A dual flush toilet is designed to regulate the amount of water used when flushing solid or liquid waste. There are two types of dual flush systems available. The first type is called a toilet syphon, which works by using a toilet handle. The other is a dual flush drop valve, which works by pushing a button or lever handle on top.

Since liquid waste needs less water to exit the toilet, a liquid flush uses a small amount of water. Most of the time it will use less than a gallon of water. A solid waste flush will need about twice the amount of water to flush effectively. Most dual flush toilets are designed with a larger trap way, so it will still use less water than traditional models.

Do dual flush toilets save water?

Yes, they do. In fact, since liquid waste can be flushed with less than a gallon of water, this will save thousands of gallons of water a year. And solid waste also uses less water than traditional toilets which also saves thousands of gallons every year.

Which is better: single or dual flush toilets?

Although dual flush toilets save water, they can take a while to get used to them. For some, it’s an adjustment to remember how to use levers or buttons. These toilets are also more expensive than traditional ones. Some users also find that dual flush toilets need to be cleaned more frequently, too.

If you are looking for ways to reduce your footprint and be more environmentally aware, the dual flush toilet is a nice option. Not only are you helping to conserve water, but you might also notice that your water bills go down as well.

How to choose the best dual flush toilet

Once you have decided to switch your traditional toilet for a dual flush one, it is important to know what you should look for when shopping for one. There are many brands to choose from. Here are a few points to keep in mind.

    • The flush technology

It doesn’t do much good if the toilet does not have a good flush technology. It is important to look for a toilet that has a powerful flush mode. If you are flushing solid waste and some of it remains and you have to flush again, you are defeating the purpose of a dual flush toilet.

    • Water Conservation

When looking for a toilet, try choosing one with the best conservation. Toilets that are optimized for dual flushing will have a seal stating the fact. This way, you can be sure you are doing the best for water conservation.

    • Bowl Shape

This is an important consideration. The design of some toilets makes it harder for some people to eliminate completely in the toilet. This can lead to more frequent flushing and cleaning.


Although dual flushing toilets can be a bit more expensive than traditional, stock toilets, they can also benefit your checkbook. Over time you may find that your water bill decreases. And some states may have tax incentives for using such toilets and other appliances designed to help the environment.

Take your time and pick out the right dual flush toilet for your home and family. It is an appliance that will do a lot for the environment.