5 Great Low-Flow Toilets to Save Water Every Day

Last updatedLast updated: August 24, 2021
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Did you know that just by replacing an old toilet in your home with a low flow toilet, you can save up to 13,000 gallons of water per year? That’s saving over $140 each year. It used to be that with each flush, the average toilet would spend approximately 6 gallons of water, but with a low flow toilet that number is reduced to nearly 1.28 gallons per flush. Reducing your carbon footprint is as simple as replacing an old toilet with a low flow toilet; however, buying a new toilet can be overwhelming. Which low flow toilet is the best low flow toilet?

We’ve combed through the low flow toilets that meet WaterSense’s standards (a volunteer program that is sponsored by the U.S. Environmental Protection Agency (EPA) and made our picks for the best low flow toilet that will not only get the job done but waste the minimal amount of water while doing it. We’ll look at how they flush, the size of the toilet, and even their warranty information to make sure that you can feel confident when purchasing your low flow toilet that you are indeed purchasing the best low flow toilet on the market.

We’ve had a weeks’ time of research and many experts and users to give a detailed insight on pros and cons of the low flow toilet installation and usage. After analyzing all the info gathered, we present to you a full comparison table, an in-detail review of each product and a thorough buying guide with the FAQ section.

Top 5 Low Flow Toilets Review 2021


TOTO WASHLET+ Carlyle IIEditor’s Choice

  • Flush type: Tornado Flush™ single
  • Dimensions: 28.25″ x 16.5″ x 28.75”
  • Seat type: elongated
  • Rough-in: 12’’
  • Warranty: 1-year limited

More features: one-piece toilet, WASHLET® bidet seat, CEFIONTECT™ glaze, concealed supply connection, ADA compliant, CALGreen certified, comfort height

The best low flow toilet is the TOTO Washlet+ Carlyle II because of its sleek design and flush style. The TOTO Washlet+ Carlyle II uses a style of flushing called Tornado Flush, which according to TOTO is a flush consisting of “two powerful nozzles that create a centrifugal, cyclonic rinsing action which reduces waste buildup and keeps the bowl cleaner. Using only 1.28 gallons per flush, this high-efficiency system is more effective in one flush than most toilets are with multiple flushes.” The toilet comes in at 28.25 inches long, 16.5 inches wide, and 28.75 inches high. It features an elongated seat type for optimal comfort and is covered by warranty for up to one year after purchase.

While this toilet is our Editor’s Pick for the best low flow toilet, it does still come with both its pros and cons, which we’ve laid out below. Overall for the TOTO Washlet+ Carlyle II, the pros outweigh the cons in their practicality and efficiency. The cons are generally more personal preference than actual concerns with the toilet itself.

What are our favorite features?

  • Easy to install
  • High-quality materials
  • Eco-friendly
  • There is an automatic bowl spritz to help with cleanliness
  • Bidet feature makes it possible to forgo toilet paper, if desired

What could be better?

  • Might be too high for smaller family members
  • Without proper programming the toilet might automatically spray every time anyone walks past it

KOHLER Memoirs K-6669-0Best Two-Piece

  • Flush type: AquaPiston® single
  • Dimensions: 30’’ x 31’’ x 20.5’’
  • Seat type: elongated
  • Rough-in: 12’’
  • Warranty: 1-year limited

More features: comfort height, ADA compliant, concealed trap way, canister flush valves, ion-barrier surface

The best two-piece low flow toilet is the KOHLER Memoirs because of its flushing technology, concealed trapway, and affordability. According to the manufacturer, this toilet features the “elegant architectural look of the Memoirs collection with Stately design. This two-piece toilet combines water-saving flush performance with traditional style. A high-efficiency 1.28-gallon flush offers up to 16,500 gallons of water savings per year.” The KOHLER Memoirs uses the AquaPiston single flush, which means that the valve opens upwards (this gives a 360-degree space with no-obstructions for the water to flow out) to create a powerful and efficient flush. The toilet sits at 30 inches long, 31 inches wide, and 20.5 inches high. The toilet comes with a 1-year limited warranty.

Overall, this toilet has an almost equal number of valid pros and cons; however, it appears that most people who have purchased the KOHLER Memoirs toilet have been very satisfied with their purchase.

What makes it stand out?

  • Classic design
  • The sleek appearance and hidden trap make the toilet’s exterior easy to clean
  • The toilet is easy to install and sits at a “Universal Height” so it will accommodate almost anyone sitting on it

Which disadvantages must you keep in mind?

  • Users report that the flush handle feels flimsy
  • The toilet comes without a wax ring or a toilet seat, which need to be purchased separately and be compatible with the toilet

Toto Neorest 700HThe Smartest

  • Flush type: Tornado Flush™ dual
  • Dimensions: 16.3’’ x 30.5’’ x 17.25’’
  • Seat type: elongated
  • Rough-in: 12’’
  • Warranty: 1-year limited

More features: CEFIONTECT™ ceramic glaze, heat seat and air deodorizer, automatic lid opening, automatic flush, ADA compliant, EWATER+ glaze, remote control operated, universal height

The smartest low flow toilet is the TOTO Neorest which has very similar qualities to the TOTO Washlet+ Carlyle II but uses more advanced intuitive technology. The TOTO Neorest is “an integrated toilet with technologically advanced WASHLET.

Neorest is a truly remarkable combination of ecology and luxury.” Smart features for this toilet include eWater+ Technology which essentially means that the water in the toilet bowl is electrolyzed water and is therefore a safe and powerful compound that keeps the bowl clean following each flush.

Other features are that the toilet has an air deodorizer, a heated seat, can be operated by a remote control, comes with a nightlight, automatic flush, and the lid automatically lifts and closes. This toilet is truly on the front end of what all toilets have the potential to become one day.

Aside from the price of this toilet, it appears to be the toilet of all toilets.

What are our favorite features?

  • The bidet feature helps keep you clean and grants you the option to eliminate toilet paper
  • User has the option to choose the water temperature, pressure, and direction
  • The bidet feature also includes a drying option
  • The preheated seat helps keep your bum warm, especially on cold nights
  • Built-in night light makes it easy for middle of the night bathroom use
  • The toilet can sense whether a .08 gallon or a 1.0-gallon flush is needed
  • There is an automatic fan that also helps reduce odors

What could be better?

  • The automatic open/close of the lid can become an annoyance if the toilet is in the middle of the bathroom near the sink or tub. However, this feature can be disabled
  • Complicated installation
  • The toilet uses a good amount of power in order to accommodate all its futuristic features
RELATED: 8 Amazing Smart Toilets – Enjoy All The Benefits Of The Progress

Duravit Darling NewBest Wall-Mounted

  • Flush type: dual
  • Dimensions: 24.6’’ x 14.3’’ x 15.7’’
  • Seat type: elongated
  • Rough-in: 12’’
  • Warranty: 5-year limited

More features: WonderGliss coating, wall-mounted, dura-fix connection

The Duravit Darling New is the best wall-mounted low flow toilet.

Wall-mounted means that this toilet is elevated off the ground and clings to the wall. This toilet uses a dual flush type, which means that there are two options for flushing: one that uses less water and one that uses more.

The user selects which flush by pushing a button. Because this toilet does not have a stand for the floor, it is small coming in at 24.6 inches long, 14.3 inches wide, and 15.7 inches high.

Unlike the other toilets we’ve mentioned, the Duravit Darling New comes with a 5-year limited warranty after purchase.

But you should note that this type of toilets has a weight limit that for this particular toilet is around 300 lbs.

If you have a small bathroom or are simply looking to create a little bit more space, the Duravit Darling New is the toilet for you!

What stands out?

  • Space-saver
  • A soft close lid is included
  • Comfortable seat and easy potty training installment
  • Eco-friendly flushing system

What cons did we manage to find?

  • This toilet does require specific installation because it mounts directly into the wall. A wall mounting hardware kit is required
  • Weight limit is 300 lbs

American Standard Cadet 3Budget Pick

  • Flush type: single flush
  • Dimensions: 30.75’’ x 15.75’’ x 30.25’’
  • Seat type: elongated
  • Rough-in: 12’’
  • Warranty: 5-year limited

More features: EverClean® surface, concealed trap way, PowerWash™ rim, slow close seat included, 3’’ flush valve, ADA compliant, Right Height™

The toilet we chose as our budget pick is the American Standard Cadet 3, which features a single flush style, concealed trapway, PowerWash rim, and a slow close seat. According to the manufacturer, the toilets best qualities include the elongated bowl, which “is more comfortable, and a Right Height comfort height of 16-1/2 inches makes this tall toilet exceptional, and ADA compliant for handicap use. The oversized 3-inch flush valve helps to create a more powerful flush, and a generous 2-1/8-inch trapway helps to prevent against clogging.

An innovative PowerWash Rim keeps the toilet bowl clean after every flush, and the revolutionary EverClean surface inhibits the growth of stain and odor-causing bacteria, mold, and mildew on the surface.”  This toilet sizes at 30.75 inches long, 15.75 inches wide, and 30.25 inches high. The American Standard Cadet 3 also comes with a 5-year limited warranty after installation.

If you’re interested in saving water while maintaining the classic toilet look, this toilet is the one for you. Just be prepared to hold down the handle or flush twice when necessary.

Why did it make our list?

  • This toilet fits well in a small bathroom and gives the bathroom a modern look
  • It is easy to install
  • Flushes at 1.28 gallons per flush and is a huge water saver
  • ADA compliant
  • Comfort height
  • Slow-close seat
  • Inexpensive

What is not ideal about it?

  • Because it uses less water, occasionally the bowl will require two flushes in order to wash down all the matter

Things to Consider

Now that we’ve gone through each of our top picks for the best low flow toilet, its decision-making time. Of course, everyone has their own list of qualifications they are looking for in a toilet that are specific to their needs. However, there are also other things to keep in mind when purchasing a low flow toilet

Low flow toilets – pros and cons

5 Great Low-Flow Toilets to Save Water Every Day

Buying a low flow toilet can be a pretty big decision. Aside from all of the low flow options out there, is buying a low flow toilet even worth it? A low flow toilet saves between five and six gallons of water per flush. If the average person flushes six times a day, that’s 42 gallons a day that purchasing a low flow toilet could save. That, in turn is nearly 294 gallons saved in a week and 1,260 per month. Imagine what kind of cuts that would make on a water bill.

However beneficial low flow toilets are for the environment and your pocket, they do have a tendency sometimes to not flush with the same force that other toilets do, which could result in a clog or multiple flushes (which then wastes the water you’d be saving).

Price tag

Low flow toilets are not yet the “go to” when it comes to purchasing a toilet and are often priced much higher than an average, water wasting toilet. Regular toilets can cost as low as $150, whereas the cheapest low flow toilet is going to cost at least an additional $100 on top of that. Many low flow toilets even recommend having an expert install the toilet which can cost an additional couple hundred dollars. At the end of it all, the money you’ve saved in a year has likely been put back into the toilet – at least for the first 6 months to a year. Eventually though, once your water bill has dropped down from the water you’re saving, it makes financial sense to make the switch. However, if you’re interested in purchasing a low flow toilet with all the bells and whistles, those can cost up to a few thousand dollars before installation. If your goal is to have a functional toilet, help do your part to save the planet, and cut your water bill down then purchasing a basic low flow toilet is a wise financial choice to make in the long run.

Features to consider while buying the best low flow toilet

In this article, we’ve already touched on many of the great qualities that can come with a low flow toilet but what are the basic features that are imperative to consider when buying the best low flow toilet?

Type of flush

How a toilet flushes is an important thing to consider when purchasing a low flow toilet. There are a handful of different types of flushes. The Dual Flush, like in the Duravit Darling New toilet, is an ever-increasing popular choice because it is an environmentally conscious design: the more the toilet needs to flush, the more water it provides. The user chooses whether the toilet will make a “full” flush or a “partial” flush. The full flush uses approximately 1.6 gallons of water, while the partial flush uses only 1.1 gallons of water.

The Tornado Flush like in the TOTO Washlet+, releases water using two large nozzles on either side of the bowl. This flushing style only uses 1.28 gallons of water per flush.

The final type of flush is the AquaPiston single flush, which is when the toilet opens upwards to create a powerful and efficient flush. Like the Tornado Flush, this type of flush only uses 1.28 gallons of water.

Water consumption and certification

5 Great Low-Flow Toilets to Save Water Every Day

When purchasing a low flow toilet, you want to make sure that the toilet you’re purchasing is certified by WaterSense. This means that it meets all the requirements to be an environmentally friendly toilet. WaterSense looks at things like how the toilet flushes and how much water it uses per flush to evaluate whether it meets their rigorous criteria. If a toilet bears the WaterSense stamp of approval, it is guaranteed to be a good toilet option.

Bowl appearance and material

Naturally, everyone has their own personal taste, style, and preferences – even when it comes to something as seemingly simple as a toilet. Toilets are made with different material and shaped differently. Some toilets don’t even sit on the ground but are mounted on the wall. All these factors are things to be taken into consideration when buying the best low flow toilet.

One or two-piece?

A two-piece toilet is the most common toilet design and is found in most homes. Of the toilets we looked at, both the Duravit Darling New and the TOTO Neorest are one-piece toilets while the TOTO Washlet+, KOHLER Memoirs, and the American Standard Cadet 3 are all two-pieces. This doesn’t necessarily affect how the toilet works, but one-piece toilets are generally easier to clean and provide a sleeker appearance. In general, however two-piece toilets are cheaper than one-piece toilets.

Rough-in size and mounting type

5 Great Low-Flow Toilets to Save Water Every DayThe rough-in size for a toilet is the distance from the wall behind the toilet to the bolts that hold the toilet to the floor. Most toilets are between 10 and 14 inches, but every toilet can vary and it’s an important thing to take into consideration when purchasing the best low flow toilet. Additionally, if you’re purchasing a toilet, it’s important to determine whether you want a toilet that mounts to the floor or one that mounts to the wall. Mounting a toilet to a wall can save some space, but it can also be very costly to hire an expert to do the mounting.


How a toilet is cleaned is something else to consider when purchasing a low flow toilet. The TOTO Neorest automatically worked to help sterilize the toilet bowl and help create a cleaner toilet space; however, not every low flow toilet does that. How you’re going to clean your low flow toilet (on both the outside and the inside) is important to consider before buying.


It’s also imperative to think about how much noise the flush is going to make. Is the toilet going to be constantly making noises flushing and gurgling or it going to be nice and quiet and out of the way? Most people would probably prefer the quiet toilet. Especially when a toilet is using less water, like the TOTO Washlet+ that sprays automatically when it senses a person and makes noises.


It likely goes without saying that no toilet is going to last forever. However, most toilets should make it through at least a few years. Most of the toilets we discussed today have anywhere from a one-year warranty to a five-year warranty. When buying the best low flow toilet, it’s good to make a note of how long the warranty lasts for in order to take advantage of it if something were to go awry.


Unclogging a water conserving toilet is much like unclogging a regular toilet. A force flush is the best place to start, unless it’s already clearly clogged. Once it’s confirmed that the toilet is clogged, using a plunger is the most effective way to unclog a toilet. A home-remedy type of way to unclog a toilet is to pour liquid dishwashing soap into the toilet bowl with a pot of hot water. If you let that sit for about 10 minutes prior to plunging, it loosens up whatever was clogging the toilet in the first place. Additionally, baking soda and vinegar have also been known to do the trick.

As of right now, aside from a few science experiments, every toilet (by standard definition) does use water. You may want to consider composter toilets, but using them in a house is problematic, they fit more for RV.

Installing a new toilet might feel intimidating, but it is simple and can be done in eight steps.

  1. Unpack the toilet and inspect it for any damage. Ensure that all necessary parts are included.
  2. Clean the area in the bathroom and make sure that there is no additional debris on the new toilet.
  3. Flip the toilet bowl upside down (on a soft surface), peel off the protective cover on the reinforced wax ring. Press the ring into position and then lift the bowl and turn it right-side-up.
  4. Lower the toilet bowl down towards its base and position it on the T bolts.
  5. Screw in the bolts with washers and bolt caps.
  6. Thread on the nuts and tighten it until the everything is level and secure. Don’t overtighten.
  7. Double check the interior of the tank and attach the water supply line to the threaded portion of the fill-valve through the bottom of the tank.
  8. Checks for leaks, wipe up debris. Install toilet seat.

Our Verdict

Buying the best low flow toilet is a relatively simple way to make a huge impact on the planet. Overall, our Editor’s Choice for the best low flow toilet, the TOTO Washlet+ Carlyle II, is probably going to be the best choice (in our opinion). This is because it is not cheap, but it’s not tragically expensive and comes with all of the necessary bells and whistles to justify the cost. The TOTO Washlet+ Carlyle II does more than the average toilet but isn’t quite as futuristic and costly as the TOTO Neorest which has so many bells and whistles it wouldn’t be surprising if it was also a space ship.

Kohler Memoirs is our second choice for its classic design, features a comfort height design, is easy to clean due to a concealed trap way, and has an ion-barrier surface, that repells most of the bacteria off of your bathroom star.

The American Standard Cadet 3 is our third pick, primarily on affordability and practicality. However, buying a low flow toilet almost feels like the toilet should feel special and this toilet appears the same as any other toilet, from the outside at least. What is nice about the American Standard is that it comes with both the PowerWash Rim and EverClean, both of which help ensure that your toilet is the most sanitary toilet in the neighborhood.

Now that you know all things pertaining to low flow toilets, it’s time to decide. Which of the best low flow toilets will you buy?

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