The 5 Best Dual Flush Toilets To Save Water of 2024

Are you interested in finding the best dual flush toilet?

Dual flush toilets can save water by giving you the option of a light flush which is usually around 30% less water.

In this product review guide, I will go over...

  • My #1 top pick for the best dual flush toilet.
  • How to install a dual flush toilet
  • Important features of these high efficiency toilets
  • How dual flush toilets compare to other toilet types

Let's get started with this guide!

best dual flush toilets (1)

My Overall #1 Rated Pick

Convenient Height
  • Dual flushing so you can save water (1.28 gallons for full and 0.9 gallon for light)
  • Extra height of 5" above ADA so it is easier to sit and helps prevent falls
  • A more powerful flush because of the extra height (and gravity)

My overall top pick for the best dual flush toilet goes to the Convenient Height brand. The full flush uses 1.28 gallons of water and the light flush only uses 0.9 gallon --- saving a significant amount of water over the year. This extra tall toilet makes it easier to sit for most and will help prevent falls. The extra 5 inches of height also makes for a more powerful flush.

Top 5 Best Dual Flush Toilets

Only have a minute? Check out our top 5 dual flush toilets! Keep reading to see our full reviews of each pick.

  1. Convenient Height Extra Tall Dual Flush Toilet
  2. Woodbridge Dual Flush Elongated Toilet
  3. American Standard H2Option Dual Flush Toilet
  4. Toto Aquia Elongated Dual Flush Toilet
  5. Woodbridge Square Design Dual Flush Toilet

What Is  A Dual Flush Toilet?

A dual flush toilet is a special type of toilet that has a full flush and a light flush. The main benefit of a dual flush toilet is to save water over the year.

Dual flush toilet brands have been popular in Europe for decades and are becoming increasingly popular in the U.S.

Toilets can use up to 26% of the water usage over a single year. With a dual flush toilet, you will save around 35% water on each light flush compared to the full flush. However, with modern toilets, even the full flush will save a lot of water compared to older toilets.

Older grandfathered in toilets can use up to 3.5 gallons per flush, more than twice as much as a full flush of a modern high efficiency toilet.

The typical full flush of a modern dual flush uses 1.3 to 1.6 gallons, while the partial or light flush uses around 0.8 to 1 gallon per flush. In fact, federal regulations now state that toilets cannot exceed 1.6 gallons per flush.

A non-dual flush toilet uses a simple rubber flapper which drains the entire toilet tank.

The dual flush toilet uses a dual flush cylindrical valve that that will release two different amounts of water --- basically it is an engineered valve rather than a simple flap.

Read Also: What Is Polybutylene Piping? (Defective Plumbing)

How Does A Dual Flush Toilet Work?

A dual flush toilet works by using a special cylindrical flush valve that can precisely release two different amounts of water.

Most dual flush toilets will have two buttons for the flush. The smaller button is for liquids and the larger button is for solids. Some dual flush toilets also have handles, usually down on the handle is partial flush, and up is for the full flush.

The light or partial flush generally flushes around 0.8 to 1 gallon, and the full flush is around 1.25 to 1.6 gallon.

The engineered flush valve replaces the simple rubber flapper for the standard single flush toilet.

Read Also: The Best Water Pressure Booster Pumps (Fix Low Water Pressure)

best dual flush toilet (save water)

How To Pick The Best Dual Flush Toilet?

There are many different designs for dual flush toilets just like single flush toilets. But here are few features you may want to consider...

Buttons Vs Handle

With dual flush toilets, the most common way to flush is actually with buttons rather than a single handle. 

Most of the time, the buttons are on the tank, but they are also sometimes on the side. The smaller button is for liquids and the larger button is for solids.

However, if you like to put extra toilet paper on top of the tank, you may want to opt for a single handle. You pull down on the handle for partial flush, and you raise the handle for the full flush.

Toilet Height

Dual flush toilets also come in a range of heights, usually between 15" to 20".

I personally would choose a taller toilet, but it is a personal preference. If you are short, buying a toilet for a guest bath, or for kids bath you may want to opt for a shorter toilet.

Elongated Versus Round

Elongated toilets tend to be easier to sit down and use, since they protrude out more from the wall. However, round-shaped toilets are generally easier to install, cheaper, and replacement parts are easier to find such as lid replacements.

Read Also: The Best Point-Of-Use Tankless Water Heaters (Instant Hot Water)

The Best Dual Flush Toilet Brands On The Market

Here are my top choices of the best dual flush toilets with their pros and cons...

My overall #1 top pick is the Convenient Height brand dual flush premium high efficiency toilet.

The full flush is 1.28 gallons while the light flush is only 0.9 gallons --- saving a lot of water.

The extra tall toilet design (5 inches above ADA height) makes it easier to sit down and flushes more powerfully for preventing clogs.

The taller toilet makes it safer to sit down with and helps prevent falls.

  • Dual flush toilet and highly efficient
  • Extra tall toilet makes it easier to sit down
  • More powerful flush due to height
  • Cheap toilet seat
  • Water tank reservoir is loose and only uses two screws

The Woodbridge Dual Flush Toilet is a premium high efficiency toilet with dual flushing capability.

The skirted tramway (bottom of toilet) makes it much easier to clean and gives it a unique look.

The soft closing lid and dual flushing of this luxury porcelain toilet is quiet and powerful. It comes with everything you need for install: wax ring, bolts, wrench tool for tight spaces, and install manual.

  • Dual flush ability that is quiet and powerful
  • Skirted tramway makes cleaning easier
  • Includes wrench tool, wax ring, and bolts for install
  • Poor quality flush buttons (paint wearing off)
  • Difficult install if obstructions on both sides

The American Standard H2Option Toilet is a great toilet with a dual flush.

This toilet uses a water jet push to power the siphon pull in order to give you a very strong flush.

The H2Option is also coated with an  EverClean surface which is a permanent stain fighting material.

The mirror-like finish of EverClean will help prevent mold, mildew, and stains from ever forming on the toilet.

  • Dual flush toilet with full and light flushing capability
  • Powerful flushing with jetted siphonic technology
  • EverClean coating so you can keep your toilet sparkling clean
  • Toilet seat & lid must be purchased separately
  • Poor instructions

The Toto Aquia is a premium model dual flush toilet for extra water usage control.

The full flush is 1.28 gallons and the light flush is 0.8 gallons. 

This two piece toilet uses dynamax tornado technology for a full 360 degree flush for a complete clean.

It includes a soft close lid and is glazed with a ceramic cefiontect in order to prevent staining.

  • Dual flush capabilities (low flush is only 0.8 gallons)
  • Dynamax tornado flush technology for a 360 degree flush
  • Ceramic cefiontect glazing to keep your toilet clean
  • Complaints of fecal residue sticking to bowl having to scrub

The Woodbridge Square Design Toilet is a luxury dual flush toilet to save water.

The full flush is 1.6 gallons and the light flush is 1.0 gallons. The skirted trap makes for easy cleaning because there aren't corners and grooves.

The sleek and contemporary square design will take any bathroom into the 21st century. The toilet comes with a soft closing lid, wax ring, bolts, and a wrench tool

  • Dual flush capability (1.6 full & 1.0 light)
  • Modern square design for a contemporary look
  • Easy install (comes with wax ring, bolts, and wrench)
  • Difficult to reach bolts if obstructions on both sides

My #1 Top Pick: Convenient Height Extra Tall Dual Flush Toilet

My overall top pick for the best dual flush toilet goes to the Convenient Height brand. Here's why...

1. Dual Flush

The dual flush capability of this toilet is 1.28 gallon for the full flush and 0.9 for the partial flush --- helping you save a lot of water.

2. Extra Height

The 5 inches above the ADA "comfort height" means that it is easier to sit down for most adults, and will help prevent falls.

3. More Powerful Flush

Since there is an extra height to this dual flush toilet --- there is more gravity --- which creates a more powerful flush. Weak flushing with dual flush toilets is one of the top customer complaints.

Read Also: The Best Bidet Toilet Seats (Wash & Dry Technology)

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