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Dual flush toilets are those that have one button for changing the amount of water used per flush. These buttons usually have two pieces that use more or less water based on which one you press. The models generally look like traditional products and will fit in the space used by your old one.
Our top pick is the WoodBridge T-0001, Dual Flush Elongated One Piece Toilet, which uses just one piece and has a very streamlined and modern design.
It has a chrome push button on top that includes one much larger button and one smaller button that correspond with the amount of water you want to use. It comes with an S-trap and a soft closing seat.
Top 10 Dual Flush Toilets Reviews For 2019
The T-0001 has a modern design with a soft or bright white finish and push buttons on the top that come in a bright chrome finish. You can save more water or ensure that more waste leaves the bowl based on the button that you choose to push. Those buttons can stick, but this is a common problem found on most of these models.
A fully glazed trapway creates a smooth surface that debris cannot stick to and allows the waste to move right down the drain. It also has a skirted design that is easy to wipe clean and a siphon that reduces the risk of clogs and leaks. You also get mounting hardware and installation instructions with this model.
This model proves that you can get a great buy on one that uses two different amounts of water and still save on the space that you need in your bathroom. As it is a corner model, it comes with a tank that has a triangle shape that touches two walls and gives you access to the tank via an open space on the back. It comes with a matching seat but no bolts or other mounting hardware.
Made from a china material, this model has a bowl that extends out less from the tank and wall to give you even more room. That china is resistant to all types of scratches and most of the common bathroom stains too.
This model is a ultra low flow and highly efficient model that uses just 0.8 gallons when you press one button and 1.6 gallons when you press the other. Both buttons are part of a chrome piece that sits on top of the tank, and one button is significantly larger to correspond with the higher water setting. It uses a single piece, which gives it a contemporary look.
An S-trap hidden inside the base squeezes the waste down into a more compact shape to keep clogs from forming. This trap is fully glazed too, which keeps the waste from sticking to the sides and reduces the risk of that waste leaving behind stains.
One of the more contemporary models we spotted is this one from KOHLER, which qualifies for rebates in some areas and meets the guidelines for admission in the WaterSense certification EPA program. It has a highly modern design with a square base and a lid that matches that base. Though it comes with a seat, this seat uses plastic nuts and bolts that may make it wobbly.
Push buttons on the lid of the tank correspond to either 0.9 gallons of 1.6 gallons of water, but those buttons can stick when the humidity level is high. It also comes with a one-year warranty from the manufacturer.
Sleek and modern, this Ivy from Swiss Madison has a chrome push button mechanism on the top with two buttons that let you use either 0.8 or 1.28 gallons of water to clear out the bowl. The elongated bowl is longer than others and slightly wider on the sides to support your entire weight and all of your body. It comes with a matching seat with a soft close design.
This model also has a comfort height that helps you sit without feeling like you need to squat. You may like that it has a full skirt surrounding the sides that hides all the parts of the base because this makes the exterior easier to clean.
The first model from American Standard to make our list is this one, which is smaller in size and similar to those found in tiny studio apartments. It has a round seat on the front that provides more support for your lower body and a comfort height that is the right height for adults. The manufacturer made this one compatible with bidets and other attachments too.
The vitreous china used in its construction is strong enough for daily use and for years of use too. It comes with a smooth trapway that keeps debris from sticking to the sides. All waste and water moves smoothly through this trap.
If you need a product that you can keep clean without a lot of hassles, this American Standard option is the right one for you. Its power wash system features holes equally spaced around the rim that let water come down when you flush to rinse off the inside of the bowl. It also comes with an EverClear surface coating that is resistant to stains and reduces some of the odors in the room too.
The chrome button on the lid has one button that uses 0.92 gallons and a second button that uses 1.28 gallons. It also comes with siphons that increase the pressure of the water used.
The H2Option technology used on this American Standard model uses a small amount of water and more power to keep the bowl looking cleaner. It also comes with the power wash feature that pushes water down through a series of holes around the rim to wash all areas of the bowl each time that you flush. The larger push buttons on the top of the tank are easy to see too.
Capable of using 1.28 or 0.92 gallons per flush, this model also comes with the EverClean system that American Standard designed. This system prevents the build up of germs on the surface of the bowl and can also keep mold and mildew from growing too.
A round push button on the top of the Aquia has two sections that let you choose between using 1.6 gallons of 0.9 gallons of water, but using less water may require that you press the button multiple times to eliminate everything from the bowl. That bowl has an elongated shape and comes with a lid that has a small brace on the back, which turns the seat into a rest that supports your back. It also has a skirted design that gives the entire product a clean look.
Another benefit of this model is that it has a bowl that sits closer to the tank, which significantly reduces its overall size. It also comes with the manufacturer’s patented dual flush max technology.
Made from a single molded piece, the construction on this model gives it a streamlined look that will fit in any modern bathroom, but it is significantly heavier than similar models made from one piece. It has push buttons on the top in a stainless steel finish that matches the finish on the seat hinge. Each button uses more or less water and help pull debris down the trap with one flush.
It also comes with a soft close seat that gently drops down on the bowl with one touch without crashing into place. You get a wax ring that stops leaks and the bolts that let you mount it to the floor.
Verdict: Our Top Pick
The WoodBridge T-0001, Dual Flush Elongated One Piece Toilet is a good choice for those who want something less traditional and more modern because it has a streamlined design made from a single piece. A chrome button on top has one larger button and one smaller button for using 0.8 or 1.6 gallons of water when you press that button. It also has a seat height of more than 17 inches, which is more comfortable for many people.
An S-trap inside is fully glazed to keep debris from sticking to the trap and to minimize the risk of clogs. It comes with a soft closing seat to prevent loud noises too.
Dual Flush Toilet Buying Guide and Tips
What is the Minimum and Maximum Flush Rating?
Dual flush models use one setting to flush smaller chunks of waste and for liquids and a second for solid forms of waste. You should check the minimum and maximum settings to ensure the product has enough power to keep up with those living in your home.
A minimum setting is usually around 0.9 to one gallon of water. When looking at the maximum rating, you might see a figure of around 1.28 to 1.6 gallons. A larger setting will offer more flushing power, especially when paired with siphon technology or a canister bowl that moves the water faster.
You may want to look at those with a gravity design too that combines the flapper with the trapway. When the flapper lifts, gravity forces water straight down from the tank and into the bowl. A smaller water setting may not remove all the visible waste in the bowl.
Where is the Flushing Mechanism?
The flushing mechanism found on these products is different from a flushing handle or lever. It typically looks like a large button with two buttons built inside. Some place this button on the top of the tank, but others place it closer to the base.
Having a button on the top is more convenient for those who cannot or do not want to bend down and lets you flush from a standing position. Some prefer leaning down slightly and pressing the button right before standing up. Manufacturers sometimes make one of the two buttons slightly larger to let you easily see which one produces a larger flow of water.
Does it Use One or Two Pieces?
Some models use just one piece and have a molded design that incorporates the bowl with the tank, but others come with two pieces that separate those parts. A molded design is a good choice for those who want a cleaner look because these models lack any seams that can collect and attract dirt. Those that use two pieces let plumbers take away and repair or replace one piece and let you more easily carry the parts into your home via the shipping boxes.