Top 6 Dual Flush Toilets – Your Guide to Saving Water in 2021

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Last updatedLast updated: February 09, 2021
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For many people, just having a standard toilet with the bare minimum features isn’t enough anymore. Getting a decked out toilet, which is not only comfortable, but both durable and water efficient will be more worthwhile in the long run. That’s why we have put together a list of the best dual flush toilets, to help you in your quest to search for the efficient toilet that suits you best.

Dual flush toilets save up to 68 percent of water in a light flush mode, and moreover, some of them go beyond and offer more great features than some conventional toilets do. So before you buy your throne, you should consider your needs and decide on the size and design, price range, as well as all those additional features. Luckily, we’ve already made things easier. During our research, we compared, tested and evaluated numerous toilet models and specifications. We even combed through all the available reviews to narrow down your search for the best dual flush toilet.

In accordance with our research, we’ve made a list and a comparison table of six of our top picks. They have all the features that you might consider in your ideal toilet. We’ve also given an in-depth product review alongside the pros and cons of each product with an overall rating. And finally, we have prepared a buying guide for you so that you can use it to understand the different features and also to distinguish between the best dual flush toilets available right now.

Top 6 Dual Flush Toilets Review 2021


WoodBridge Bath T-0019Editor's Choice

  • One-piece toilet
  • Elongated bowl
  • 1.0 or 1.6 gallons per flush, average at 1.28 gallons per flush
  • Meet EPA flushing guidelines
  • UPC and CSA, WaterSense certified
  • Siphon flushing design
  • Comfort height
  • Easy installation design
  • Includes pre-installed toilet seat
  • 5-year limited warranty

The T-0019, complete with a contemporary look, is modern, sleek and elegant. It’s flexible dual flush mechanism is very water efficient. It has the siphon flushing design, which not only makes for a powerful flush but it also creates minimum noise. Comparing it to the standard 3.5-gallon toilet, the T-0019 can save you up to 16,500 gallons a year.

It stands at a height of 18 inches from the top of the seat to the floor, ensuring that many adults can get on and off it without compromising their comfort. This toilet also has a narrow width which can save you some space in your bathroom. Compared to other toilet designs, the T-0019 has a skirted design and lack of nooks and crannies, making it easier to clean. To aid with the installation, the toilet comes with a special hand wrench which makes the bolts in the corner easier to tighten.

What we liked:

  • Elongated bowl allows for increased comfort
  • Modern and luxurious design
  • Fits into small, tight spaces
  • Long lasting

What could be better:

  • Tricky to install
  • Not completely flat on the bottom

American Standard 2886.216.020 H2OptionBest Flushing Power

  • Two-piece toilet
  • Elongated bowl
  • H2Option Dual-Flush System
  • 1 or 1.6 gallons per flush
  • Jet-Powered Siphon
  • 12″ rough in
  • 16-1/2″ PowerWash rim height
  • WaterSense certified
  • Meets ADA specifications
  • Pre-assembled, which cuts installation time
  • 5-year warranty

The American Standard H2Option is a compact, yet affordable throne. And with the way it’s designed, it doesn’t compromise on its flushing ability while also using minimal water. This throne also has an EverClean antimicrobial surface coating which stops stains and odors from the toilet by halting the growth of bacteria.

Its flushing power is no joke either. It is able to flush down 1000 gm of waste in its heavy flush mode and 400 gm of waste in the light flush mode. It has received the highest MaP rating in its class and guarantees that most of the waste will be disposed off. It also has an easy connect feature which reduces its installation time by approximately 30%. And, because it’s easy to set up, you don’t need to go through the hassle of hiring a contractor.

What we liked:

  • Quiet, noiseless flush
  • Sturdy and clog free for years
  • Small size, so good for bathrooms with limited space
  • Easy to set up

What could be better:

  • Not as comfortable as other models
  • Sometimes the stool sticks on the wall

TOTO AQUIA IV Easiest to Clean

  • Universal height
  • Rimless design
  • Ceramic glaze
  • SoftClose seat
  • 1.28/0.8 GPF
  • 1-year warranty

TOTO AQUIA IV is a dynamic dual flush toilet that minimizes water wastage with a 360-degree cleaning system that channels the water through the rim to wash every section of the bowl.

The DYNAMAX TORNADO FLUSH system meets the standards set by CEC, CALGreen and WaterSense, and allows owners to conserve 9 to 123 gallons of water daily, according to the manufacturer. You could even claim rebates on your water bill if you live in California, Texas and Washington and other areas with WaterSense rebate programs.

This dual flush toilet offers 2 options to select your flushing level; 1.28 or 0.8 gallons per flush. The rimless style keeps the whole pan evenly clean and the bowl’s design reduces resistance to eliminate more waste with less water. This also makes the toilet quiet.
The universal height makes this toilet a suitable choice for both private and public use because it accommodates most individuals.

It is made of CEFIONTECT ceramic glaze with an ion-barrier that prevents accumulation of mold and debris. However, a couple of users found the glaze high maintenance and would prefer a non-stick inner coating that does not require frequent cleaning. They also wish for a higher water level.

Setting the toilet up can be tricky without templates to guide you. You need to drill 6 holes into your floor beforehand to install the 12-inch Unifit Rough-In. You can also opt for rough-in of 10 or 14 inches bought separately. Users could also upgrade to an electronic WASHLET bidet seat for additional comfort.

What we liked:

  • Universal height
  • 1.28/0.8 GPF
  • SoftClose seat
  • EPA WaterSense certification
  • Tornado flush system
  • Rimless design

What could be better:

  • Low water level
  • Difficult to install

Toto Neorest 700HBest One-Piece Toilet

  • One-piece toilet
  • Elongated bowl
  • Tornado Flush flushing system
  • Dual Flush: 0.8 or 1.0 gallons per flush
  • Automatic lid opening and closing & automatic flush
  • ewater+
  • CeFiONtect glaze
  • Air deodorizer & heated seat
  • Remote control
  • Nightlight
  • Universal height
  • ADA compliant
  • 12″ rough-in
  • Warranty: 3-year limited (residential), 1-year limited (commercial)

Packed with all the latest technology, the TOTO Neorest 700H is a perfect blend between luxury and environment-friendly. Even though its water usage is lower compared to the average toilet, it flushes consistently and automatically.

It also uses its superior technology such as the ewater+ that transforms even ordinary tap water into a powerful but safe compound, which has properties similar to those of a household bleach, while flushing to keep the toilet bowl clean. This electrolyzed water even reverts itself back to normal water after 2 hours, removing the chemicals it added into the environment.

Alongside this, the Neorest 700H also has a CeFiONtect glaze – a non-porous glaze – that makes it impossible for even the tiniest of waste to stick on the toilet surface. This throne has so many features that it can baffle the user, but worry not, the owner’s manual has everything covered.

What we liked:

  • It cleans itself, so saves time and effort
  • Extremely comfortable
  • Heated seat is useful during winter
  • Adjustable water flow
  • Economical with only 0.8 GPF to 1.0 GPF

What could be better:

  • More expensive than other models

KOHLER K-3987-0 WellworthBest for Preventing Clogs

  • Two-piece toilet
  • Round-front bowl
  • 1 or 1.6 gallons per flush
  • 2-1/8-inch glazed trapway
  • Left-hand nested trip lever
  • Meet EPA flushing guidelines
  • 1-year limited warranty

KOHLER-K-3987-0 Wellworth, with a round front bowl, is compact and small enough to fit into most, if not all, bathrooms. Although it does not have comfort height, it is still pretty comfortable. You can also utilize the space at the top of the tank for more storage. Its best aspect, however, is that you will not have to use the plunger even once. Its high flush power and glazed trapway ensure that, through a quiet, quick and efficient flush, the waste is cleared for good.

This KOHLER toilet has a dual flush lever and so lets the user switch between 1.1 gallons per flush and 1.6 gallons per flush. The 1.1 gallons per flush provides huge water savings and the dual flush lever option might be better for the long term. It is the best buy for a decent budget and its affordability makes it an even better choice in comparison to other toilet models. It is even available in different colors like: white, almond, biscuit and black.

What we liked:

  • Has a flat top, can act as storage
  • Easy to install
  • Clog free design with rectangular opening

What could be better:

  • Not as comfortable due to the height
  • If clogged, a standard plunger won’t be able to unclog it

CO-Z Siphonic Dual Flush ToiletBudget Pick

  • One-piece toilet
  • Elongated bowl
  • 1 or 1.6 gallons per flush
  • Quick 5-sec flush, 20-sec tank refill
  • Siphon jet action flushing
  • high-density glaze materials to minimize bacteria
  • Low-profile dimension: 27.6” x 15.7” x 24.0”
  • 12’’ rough-in
  • Toilet cover and necessary installation parts included
  • 1-year warranty

A stylish yet elegant design, the CO-Z Siphonic Dual Flush Toilet is the best model you can get at an affordable price. Its high density glazed coat makes it very easy to clean while also minimizing residues and bacteria proliferation. This glazed coat with its sleek surface also ensures that there is minimum staining on the bowl.

Due to its siphonic technology, a full flush takes less than 5 seconds, making sure that the most water is saved while also reducing the noise as much as possible. And the toilet tank only takes 20 seconds to refill. Because of its 2.8-inch water level, it prevents odor emission by bacteria that cause these odors. The toilet is also small in comparison to others in the market, so the CO-Z Siphonic Dual Flush Toilet can help make your washroom even spacious while not compromising on your comfort as you do your business.

What we liked:

  • Easy to clean
  • Low flush volume
  • Reasonably priced compared to other similar products

What could be better:

  • Water pressure is a little bit lower compared to others
  • A bit difficult to install

Things to Consider

Everyone needs a quality toilet; there’s no two ways about it. But understanding what type of toilet is right for you can be tricky. Alongside the models, there are also numerous features you need to consider. Read on as we explain further to help you navigate your way through the confusion and eventually, make up your mind on what you really want.

What is dual flush and why do we need it?

Flush dual

First of all, let’s clarify what a dual flush toilet is and why it’s better than the traditional toilet. The dual flush toilet features two buttons, which are usually placed on top of the tank and allow you to control the amount of water being dispensed. The first button, the half flush mechanism, is for your liquid waste and, the second button, the full flush mechanism, is for your solid waste. With the dual flush function, throughout the course of the day, you can really save up a lot of water.

During a partial flush, such toilet uses 50% or less water than what it uses during a full flush. If used properly, a dual flush toilet amounts to an average 1.28 GPF (gallons per flush) and some models even go as low as 0.9 GPF. To put that into perspective, the traditional single flush toilet uses 3.5 GPF. So, by using the dual flush toilet, you’ll be reducing your water usage which will in turn reduce your hefty water bills, making your wallet happier.

However, you need to be careful while buying the dual flush toilet. Installing a lower quality toilet might require you to flush twice and sometimes even thrice. This defeats the entire purpose of installing a toilet that reduces your environmental footprint.

Type and configuration

Top 6 Dual Flush Toilets – Your Guide to Saving Water in 2021

Most toilets are in one of two types: one-piece and two-piece. The two-piece toilet is the more traditional and common design. It is in a two-piece setup so the bowl and the tank are separate and have to be joined together. The two-piece toilet design is the cheaper option. The one-piece design is quickly becoming the preferred type amongst many people these days. This is mostly due to the fact that there is no seam between the bowl and the tank so it is easier to clean (less area to trap bacteria) and looks sleeker. Because it comes in a ready to use format, unlike the two-piece setup, the one-piece toilet commode doesn’t have to be assembled and put together.

If you paid careful attention to our comparison list, you must have noticed the third type of toilet. The wall-hung/wall-mounted toilet is a recent addition in the market and has a modern twist on the traditional toilet. It comes with a separate carrier tank that has to be installed inside the wall. To implement this style of toilet, you will need to modify your plumbing system.

Shape and size

Toilet bowls often come in two shapes: round and elongated. Round bowls are circular in shape while elongated bowls are oval or rectangular shaped. Generally, toilet bowls that are circular in shape are two inches shorter than bowls that are elongated. Round-size toilet bowls are usually 16–17 inches long while elongated toilet bowls are 18–19 inches long. When measured from the floor, the bowl height is typically 14–15 inches tall. Round toilets are compact and take up less space than elongated toilets so they are suitable for small bathrooms. They are also cheaper. Elongated toilets, on the other hand, are more comfortable due to the extra inches. These days, hybrid bowls are also available which combine the best of both the toilet bowls. Hybrid bowls have a compact oval shape in order to save space and they also provide increased comfort.


Draining the toilet bowl

There are different innovations for the flushing technology. Even within all of a toilet’s components, we all know that the flushing system is the most important function. There are two standard flushing systems available: pressure assisted flush system and gravity flush system.

With the pressure assisted flush system, pressurized air forces the water into the bowl. It uses a combination of water and high-pressure air. So, when you flush, the pressurized air sucks the waste with quite a big force. This system creates quite a noisy flush and can be expensive; however, it is more efficient and uses less water.

The gravity flush system is the more common and simpler system. This system has a flush valve that relies on gravity by using the water weight to generate flushing pressure. The waste passes through an S-shaped trap way, and a siphoning action completes the flush. This system is more affordable and has a much quieter flush. Even within flushing systems, a new innovation is the dual flush system which operates on a water-saving technology. It gives the user two flushing options.

Style and design

Choice of toilet bowls

Toilets come in abundant styles and abundant materials. They can either be in the classic white porcelain design or have a modern sleek look. Although most buyers still pick white, they even come in exotic colors such as glacier blue and peach. However, we recommend picking a color that is likely to stay in style. Because toilet seats don’t come with the toilet itself and have to be purchased separately, they can be made of plastic, real wood, polypropylene and even cushioned vinyl. These days, we even have slam free or slow close toilet seats that are quieter. Some of the more modern seats also have surface heaters, warm water stream, drying and deodorizing functions, if that’s something you might be interested in.

Price range

Depending upon the type of toilet you want, the price will definitely vary. Although an average toilet costs between $200–$800, the price increases as features increase.

When you’re purchasing a toilet, you have to factor in the installation fees, shipping as well as the toilet seat. If you’re buying a wall hung toilet and don’t have the necessary fixtures, be ready to pay a few hundred dollars more to reconstruct the inner plumbing and to add an inner tank.


The best dual flush toilets not only save water and money, but also satisfy your personal needs. The comprehensive list we’ve shared contains the toilets which we truly believe every household needs. It can be quite a hassle to find the right throne for you, when you have to take into account various sizes, styles, flush systems, bowls, additional features and prices. However, we hope that our guide will be of help to you to make this process easier. Besides the information we’ve provided, we encourage you to look through customer feedback of the toilets as well as the ratings they have provided. At the end, the best toilet for you will depend on your personal taste but we hope we have at least narrowed down your search a little bit.

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