5 Best Low Flow Toilets 2020 (Less Than 1.3 GPF)

Did you know using a low flush toilet has a bigger positive effect on the environment than not using Starbuck straws?

With the invention of new flushing systems like E-Max and Dynamax Tornado the modern low flow toilets can use water much more efficiently. Using less water to flush down your shi…business, you can:

What is considered a low flush toilet?

Standard flush toilets use more than 1.6 gallons of water per flush (GPF). The low flush toilets, uniquely marked with a WaterSense label) use less than 1.3 GPF. That means that these water-saving toilets 2020 edition use at least 20% less water per flush than standard flush toilets.

We have prepared a list of 5 best low flow toilets, ranging from high efficiency 1.28 GPF toilets all the way down to the ultra low flush toilets that use as little as 0.8 GPF.

Be sure to read the individual reviews of the water-saving toilets below with some of the most frequently asked questions about how do the low flow WaterSense toilets work.

Best Low Flush Toilet Reviews (Water Saving Toilets)

Low Flow Toilet:TOTO Aquia IV KOHLER K-6669-0 Memoirs StatelyTOTO CST744EL#01 Eco Drake Swiss Madison SM-1T254 St. Tropez Niagara 77001WHCO1 Stealth
Photo:high efficent dual flash toilet by totobest american standard right height toileteco-friendly drake toilet with 1.28 gallons per flushbest toilet that uses less than 1 gallon of water per flushniagara low flow toilet in white
Flush Volume:0.8/1.28 GPF1.28 GPF1.28 GPF0.8/1.28 GPF0.8 GPF
Flush Type:Dynamax Tornado Aqua Piston 360E-Max FlushDual Tornado FlushUltra-High-Efficiency Flush
Quality:4.8 out of 5 stars5 out of 5 stars4.8 out of 5 stars4.6 out of 5 stars4.3 out of 5 stars
Rating:4.8 out of 5 stars4.6 out of 5 stars4.6 out of 5 stars4.2 out of 5 stars4 out of 5 stars
Bonus:+ WaterSense
+ SoftClose seat
+ Dual Flush
+ CeFiONtect
+ Comfort Height
+ Polished Chrome lever
+ Certificates: ADA, CALGreen, CEC
+ Best Budget
+ Unique Design
+ Dual Flush
+ SoftClose seat (included)
+ Ultra Low Flush
Availability: Check Price Check Price
Check Price Check Price Check Price

#1 TOTO MS446124CEMG#01 Aquia IV Review (Best Low Dual Flush Toilet)

When it comes to low flow toilets, the Japanese toilet maker TOTO is the #1 brand. They have developed the most highly efficient flushing system such as Dynamax Tornado and E-Max Fast flush. Naturally, the best water-saving toilet TOTO developed – the MS446124CEMG#01 Aquia IV – is also the best low flow toilet you can buy.

The TOTO Aquia IV is explicitly designed to save as much water as possible with every flush. TOTO isn’t famous for implementing a dual flush system went the extra mile with the Aqualia IV and incorporated the most eco-saving dual flush system they have. This brings down the GPF to:

  • Big flush: 1.28 GPF.
  • Small flush 0.8 GPF.

0.8 gallons is the lowest possible flush volume any toilet can have. Such a low flush in TOTO Aquia IV is possible thanks to the cutting edge Dynamax Tornado flush system. The system pours the water from 360 degrees – all around the toilet bowl – with high speed. Coupled with CeFiONtect ceramic glaze, even as little as 0.8 gallons of water can clean the toilet remarkably well.

toto has developed the best low flow toilet that uses dual flush to decrease the amount of water needed for a single flush
TOTO MS446124CEMG#01 Aquia IV is the #1 low flow toilet. It uses Dynamax Tornado flush system to clean CeFiONtect glazed ceramic and as little as 0.8 gallons of water per flush.

Even the bowl design is designed to assist the water flow during the flush. This is how a toilet can squeeze out as much water efficiency as possible. Furthermore, the design of the flow also prevents turbulences, which reduces the sound a flush makes.

The whole design of Aquia IV is magnificent. This is a contemporary 1-piece low flow toilet that incorporated the minimalistic design to create the most water-efficient toilet in the world.

On top of that you even get the Softclose seat included in the package.


  • Best dual flush water efficiency – 0.8 GPF and 1.28 GPF.
  • Dynamax Tornado 360-degree flushing system.
  • CeFiONtect ceramic glaze for high-efficiency flush and easy cleaning.
  • 1-piece minimal design that prevents turbulence and provides a quiet flush.
  • Softclose seat.
  • Made by TOTO, best low flow toilet designer in the world.


  • Only available in cotton white.
  • Small 0.8 GPF flush is not sufficent for big ‘number 2’ business.

#2 Best KOHLER Water Saving Toilet – K-6669-0 Memoirs Stately (Harnessing Gravity For Flush Efficiency)

KOHLER is the best American toilet makes for low flow toilets. Their best toilet with below 1.3 GPF is the K-6669-0 Memoirs Stately that uses gravity is a smart way to decrease the water needed for a single flush to 1.28 gallons.

The KOHLER toilet uses hydromechanics in order to achieve low flush efficiency (also known as high efficent toilets or HET toilets). The Aqua Piston canister is designed to enable the flow of water into the bowl from all sides (360 degrees).

In order for the water to gain speed during the flush, the flush valve has a decreasing 3:2 ratio. This decreases the surface area through which the water flows and hence increases its speed. By effect, it uses natural gravity to use as little water as possible to achieve the most water-saving flush.

water saving kohler toilet that uses less than 1.3 gallons per flush
KOHLER K-6669-0 Memoirs Stately uses as little as 1.28 gallons of water per flush. It uses natural gravity to speed up the water using a smart valve design.

Everybody who hates cleaning toilets (or using too much water and cleaning chemicals to do it) will love the cleanliness-friendly design of K-6669-0. The trap way, which is usually the hardest to clean in a low flow toilet, is concealed and doesn’t gather as much dirt as it would otherwise.

Even the Aqua Piston canister seal is much less exposed and therefore easier to clean. Nonetheless, this is a classic two-piece toilet with timeless design but that part where the bowl and the tank come together has to be cleaned regularly.

An additional bonus the KOHLER Memoirs Stately has is the comfort height seat. In fact, this is one only comfort height low flow toilet has is both of the list of the best low flow toilets and on the Top5er’s list of the best comfort height toilets.


  • Low flush volume – only 1.28 GPF.
  • Flushing system of Aqua Piston canister coupled with 3:2 smart valve use (uses natural gravity).
  • Comfort height (easier to sit down and stand up).
  • Polished Chrome trip lever is included.


  • Traditional 2-piece toilet design (timeless, yet not modern).
  • Seat and supply line are not included.

#3 TOTO CST744EL#01 Eco Drake (Low Flow Version Of The Most Popular TOTO Drake Toilet)

The most popular and beloved TOTO toilet is it’s iconic TOTO Drake. However, Drake has 1.6 GPF (check the list of best TOTO toilets for more) and everybody who is enough environmentally-minded wants to buy a low flush toilet to decrease the amount of water spent per flush.

That’s why TOTO designed a water-saving toilet based on Drake and named it ‘Eco Drake’. We’re, of course, talking about the CST744EL#01 model which is quickly being sold out because it has everything we love about Drake combined with the low flow 1.28 GPF flush.

The Drake is a simple and elegant toilet which is much more affordable than the usual $500 TOTO toilets. The CST744EL#01 Eco Drake is upgraded with E-Max Fast flush system that brings the GPF down to 1.28, is ADA-compliant and has the eco-friendly WaterSense badge for being a water-saving toilet.

CST744EL#01 eco drake most popular water saving toilet with watersense badge
TOTO CST744EL#01 Eco Drake fusses the popular Drake design with E-Max low flush using 1.28 GPF. It is also the most affordable water-saving toilet, costing $200 less than a standard low flow toilet.

Not every WaterSense toilet is also ADA compliant, has a CALGreen certificate and is CEC compliant. The Eco Drake check all the green regulatory marks making is the best budget low flow toilet on the market.

TOTO has special pricing discounts when it comes to their popular Drake toilets and the Eco Drake is no exception. The full price of Eco Drake is +500$; however, you can usually get it for less than $400 with the discounts.


  • Based on the best selling TOTO Drake – but with an eco-friendly 1.28 GPF water-saving system.
  • Uses simple but effective E-Max flushing system.
  • Simple and elegant design with an elongated bowl.
  • Can be equipped with SoftClose toilet seat.
  • Available in 5 colors.
  • Best budget low flush toilets on the market.


  • Two-piece low flow toilet is a bit harder to clean.
  • SoftClose toilet seat is not included.
  • Some reviewers noticed little cracks due to delivery stresses.

#4 Swiss Madison SM-1T254 St. Tropez Review (Minimalistic Design, Dual Low Flush)

If you want to stay away from the big toilet brands and use 50% less water than a standard toilet, you should look into the Swiss Madison St. Tropez toilets.

The low flow specifications of the SM-1T254 dual flush toilet are identical to the #1 TOTO toilet and that says a lot. Swiss Madison managed to create a toilet that uses only 0.8 gallons of water for the little flush and 1.28 gallons for the big flush.

While other toilets use the 360-degree water flush from all sides into the bowl, the Swiss Madison is introducing the revolutionary Dual Tornado flush. Two streams of water are pushed into the bowl under high pressure and circle the bowl to flush all the feces and urine with dual power.

The Swiss Madison also looks environment-friendly. In my option, this is the best looking low flow toilet you can find:

swiss madison toilet can save more than 100 gallons of water per week
Swiss Madison St. Tropez is the highly efficient 0.8/1.28 GPF water-saving toilet. It also has the sleekest minimalistic design.

The St. Tropez has so many great features that it landed the No. 1 place on the list of best toilets of 2019.

Due to its minimalistic design and fully skirted trapway – the toughest part of the toilet to clean – the Swiss Madison of extremely easy to clean. Even the toilet seat can be removed for easier cleaning.

It is a one-piece low flow toilet (you can read more about why 1-piece toilets are better than 2-piece toilets here) with a unique design. Additionally, it is the ADA-compliant comfort height toilet with the distance from the floor to the top of the seat higher than 17-inches (more comfortable).

The St. Tropez model has a soft closing seat and – get this – it does come with the soft closing seat included! That’s something the big brands rarely do.


  • Best unique design that beats all the generic big brand designs.
  • Extremely efficient 0.8/1.28 dual flush using Dual Tornado flush system.
  • 1-piece comfort height toilet.
  • Extremely easy to clean.
  • Soft closing seat ready (and the seat comes included in the package!).


  • Installation is difficult.
  • Seat replacement is even more difficult.

#5 Niagara 77001WHCO1 Stealth Toilet Review (Ultra Low Flush Toilet)

When it comes to the amount of water you need to flush, the main question is ‘How low can you go?’ Most of the low flush toilets have a 1.28 GPF, some dual flush toilets even touch the 0.8 GPF with the small flush.

However, the only truly ultra-low flush toilet on the market is the memorable Niagara Stealth toilet. It uses only 0.8 gallons of water per flush making it the most highly efficient water-saving toilet in the world.

It uses the ultra-high efficiency flush technology to disperse the water as much as possible throughout the bowl.

ultra low flush toilet that minimizes the amount of water needed for a flush
Niagara Stealth is the ultra low flow toilet with 0.8 GPF. However, as a toilet, it does leave much to be desired.

Niagara Stealth is incredible in minimizing the amount of water needed for a flush. It uses 50% less water with every flush and will cut your toilet-related water bill in half.

However, this is pretty much the only thing that is extraordinary about this toilet. While other toilets will have advanced ceramic glazes, shiny Chrome levers and SoftClose seats, the Niagara Stealth toilet, despite being the ultra water-saving toilet, has none of that.

It does cost a lot less than other low flow toilets but it can’t be denied that this is one of the most stoic toilets ever – everything is about conserving water and not much else.


  • Ultra low 0.8 GPF – incredible low flush volume.
  • Cheaper than most low flow toilets.
  • Great reviews as far as customer service and aesthetics are concerned.


  • Doesn’t have fancy features like SoftClose seat.
  • Doesn’t last as long as other toilets.

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