The Best Low-Flow Water Saving Toilets With Power Flushing

Low-flow toilets are water-efficient toilets that provide waste flushing operation without consuming high volumes of water. While old-model standard toilets use as much as 3.5 gallons (≈13 liters) of water per flush, low-flow water toilets can consume as little as 0.8 gallons of water to clean the toilet bowl.

Looking for the best water-saving toilet flushes for your bathroom? We’ve got you covered!

Since low-flow toilets consume fewer volumes of water per flush, so beware of poor quality toilets in the market. They may consume low gpf, but they may fail in pushing solid waste from the bowl down into the drain lines. As a result, multiple flushes could be required for proper waste disposal, thus negating the real water-saving benefits.

But worry not…

With deep research, hands-on testing and thoroughly sifting through hundreds of user reviews against different products – we have rounded up a list of the best water-efficient toilet flushes for your household.

These top-rated models not only address the problem of high water consumption but also provide extremely powerful flushing on a gpf ranging as low as 0.6 to a max of 1.6. The result is the proper handling of solid waste and a 100% guarantee of a clean toilet bowl in just ONE FLUSH!

The Best 0.5 GPF to 0.6 GPF Toilets

  The World’s Most Advanced Water-Efficient Toilet Class  

A toilet operating on an average of 0.5 gpf is the lowest water consumption ever for any residential toilet. Here’s our roundup of the best 0.5 to 0.6 GPF toilets of 2020-2021.

Niagara Nano 0.5 GPF Elongated Toilet with Tank

The Niagara Nano is the world’s no.1 water-efficient toilet with a powerful flushing mechanism.

The toilet uses a fraction of water when compared to 99% of other toilets available in the market – consuming mere 0.5 gallons (1.8 liters) of water per flush. That is something TRULY INCREDIBLY water savings from a toilet!

Despite being too low on water consumption, there’s no way that Niagra Nano lacks in terms of performance. It’s 0.5 gpf partial flush is delivered by advanced vacuum-assist technology. A single flush sends solid waste down the drain lines in an instant and deep cleans the bowl every time… such is the power of the Niagara Nano.

Apart from its exceptional performance and water savings, we also have our two thumbs up for Niagara Nano’s design and functionality. This two-piece toilet fits perfectly against all bathroom motifs while its compact elongated shape offers more comfort than a round bowl. And if you think the solid waste is higher in amount, you can always go with Niagara Nano’s full 0.8 gpf flushing option.

What Customers Say About This Product?

The product has a 5-star rating on the company’s official website, with up to 99.99% of positive customer reviews. Customers say that by mounting this toilet in their bathrooms, they aren’t only saving water but have also saved themselves from several hassles that include clogging and repeated flushes for disposal of solid feces.

By consuming just 0.5 gpf (1.8 liters of water), this toilet delivers outstanding flushing performance. Its economical price range is also a big positive point factor to be considered.

Customers say that the Niagara Nano can do even better if it introduces a lever-style flushing valve (instead of the push buttons) in the next models – as that allows for easy flushing by kids, adults, and disabled individuals.

The Good
  • The world’s low volume toilet
  • Consumes only 0.5 gallons of water per flush
  • Vacuum Assist strong flushing mechanism
  • Removes solid waste + thoroughly cleans the toilet bowl in just one flush
  • Compact and modern design
  • Dual flushing option
  • Economical price
The Bad
  • The flushing buttons mounted on the tank’s top need more force to press than a lever, which can be complicated for small kids or elderly people.

Kohler 3901-NPR-0 Numi

Though this option is impracticable for a majority of us, if you are as rich as Bill Gates or Jeff Bezos, you can consider choosing this $7000 toilet for your bathroom. It is one of the world’s most water-efficient toilets, consuming only 0.6 gallons of water per flush.

But the list of its wonders does not end here!

In addition, the product combines the world’s most technologically-advanced cleaning technology with a top-notch infotainment system.

In terms of cleansing, it features a dual flush cleansing functionality with a self-cleaning wand, precision air dryer, and deodorizing filter all in one. Other perks included with this toilet are – heated seat and foot warmer, motion-activated hands-free seat opening/closing, built-in speakers for songs, FM radio, 8-color ambient lighting, and touch-screen remote control.

What Customers Say About This Product?

There’s not much to know about the user experiences with Kohler Numi. This is because the product is heavily priced and only a few trillionaires amongst us can pay top dollar for this technologically-advanced product.

However, from a few product reviews, we have concluded that this product is undoubtedly the world’s No.1 toilet in terms of functionalities, efficiency, flushing performance, and innovative characteristics.

The Good
  • Water-efficient
  • Consumes only 0.6 gpf – huge water savings
  • World’s best technologically-advanced deep cleansing mechanism
  • Lots of added functionalities
The Bad
  • $7000 price makes it almost impossible to purchase

The Best 0.7 GPF to 0.8 GPF Toilets

The 0.7 to 0.8 GPF is the second most low water consuming toilet range combining design, efficiency, and phenomenal flushing performance.

Caroma’s Sydney Smart Point 8 Toilet

Consuming an average of 0.7 gallons per flush, Caroma’s Sydney Smart Point-8 is one of the lowest consumption high-efficiency toilets (HET) of 2020. It features a strong flushing mechanism with dual flush technology, a 1.0 gpf full flush, and a 0.7 gpf partial flush.

The toilet has a trapway about twice the size of the industry average, ensuring you never have to deal with a plunger again. With an emphasis on shape, structure, and versatility, the Smart Point 8 Toilet adds outstanding elegance and water efficiency to the industry.

The tank features a high-performance outlet valve that has been specially designed to ensure maximum flushing performance for this circular front bowl. The toilet is ideal for multi-purpose applications where water efficiency is significant, due to the considerable water conservation benefits achieved by the 1.0/0.7 gpf dual flush system.

What Customers Say About This Product?

Caroma USA Point 8 has a good overall rating on different platforms, with 95% of positive feedback from clients mostly located in the States and Canada.

Customers are all praises for this product saying it helps them save thousands of gallons of water every year. The toilet is claimed to be excellent in terms of flushing performance. Customers have highly recommended this product to other users as well, terming it an excellent option for households that want to play their part in water conservation as well as want a clog-free low-flow toilet.

The Good
  • Saves water
  • Consumes as low as 0.7 gallons of water per flush
  • Classic design
  • Matches all bathroom themes
  • Partial and full flushing option
  • High-performance outlet valve for strong flushing
The Bad
  • Very limited stock is available in the market.


Talk about water efficiency and advanced cleaning mechanism… and we have the TOTO ST746CEMG#01 as the best option. The toilet combines water-saving with 360-degree toilet bowl cleansing. The result is a reliable waste evacuation and a sparkling clean toilet bowl in just a single 0.8 gpf flush.

Apart from being a water-saving toilet, the product has made A-Z cleaning of toilet bowl possible on low water usage – all thanks to its DYNAMAX TORNADO flushing technology. When flushed, not only the waste is pushed down into the drain lines but also the toilet’s inner bowl is firmly rinsed through all the corners. This makes this product ideal for those who don’t want to deal with disgusting poop stains on the bowl’s wall.

In addition, the inner bowl is CEFIONTECT ceramic glazed – a special coating that inhibits stains, debris, and mold from attaching to the ceramic surfaces.

And Yes! this item also features a dual flushing mechanism. A full 1.28 gpf flush option can be triggered for cleaning a higher amount of solid waste.

What Customers Say About This Product?

TOTO CST746CEMG#01 has an impressive 4.6-star rating on Amazon and is currently featured in Amazon’s Best Choice category.

Up to 95% of buyers are all praises for this product. Customers say that this toilet has got enough power to clear solid waste from the bowl with its pressure-assisted flushing and that too by consuming only 0.8 gallons of water per flush. What grants this product an even more impressive characteristic, is its 360-degree cleansing that makes sure the complete surface area of the toilet bowl is rinsed with water.

The Good
  • Conserves water
  • Uses only 0.8 gallons of water per flush
  • Strong flushing power
  • Rinses complete toilet bowl in one flush
  • Dual flushing option
  • 360-degree cleaning
  • Ceramic glaze coating
The Bad
  • The seat needs to be purchased separately.
  • The size is small. Could be tight for medium to fat people.

The Best 0.9 GPF to 1 GPF Toilets

Have a look at the third most water-conserving toilets, consuming only between 0.9 to 1 gallons of water per flush.

American Standard 2887218.021 H2Option Dual Flush Elongated 0.92/1.28 gpf Toilet

Talk about power flushing and water efficiency… and we have the American Standard H2Option has the BEST OVERALL low-flow toilet.

The toilet features Dual Flush functionality which allows the user to select either a 0.92 gpf or 1.28 gpf option when they use the toilet. This allows for advanced water-saving as you can go with the partial flushing option for liquid or minor solid waste, thus avoiding the use of a full flush option where it is not needed.

And since the toilet operates on low water usage, the product is integrated with Siphon Jet Bowl Technology + PowerWash Rim that allows for proper disposal of solid waste as well as a shimmering clean toilet bowl in just one water-efficient flush.

To ensure much more effective cleaning, the entire toilet bowl is coated with “EverClean” – a special coating that inhibits the growth of stains, odor-causing bacteria, mold, and mildew on the surface of the toilet bowl.

Apart from its efficient flushing operation, there’s no compromise made on the toilet’s look either. Chrome-plated flushing buttons, two-piece elongated bowl design, optimal seating height, and color-matched bolts – make this toilet seat fit all bathroom motifs.

What Customers Say About This Product?

The American Standard 2887218.021 has a pretty good overall rating of 4.3-stars on Amazon. Up to 90% of buyers have expressed deep satisfaction with the purchase of this toilet.

Customers have their two thumbs up for this product, saying it manages brilliantly to flush out solid feces in an instant. Its strong mechanism ensures the toilet stays free of clogging and you never have to use the plunger again. Plus, you are getting powerful flushing on low water usage. And the toilet has further been made water-efficient with the dual flush option. The only downside mentioned is the additional purchase required for the seat.

The Good
  • Advanced water efficiency
  • Dual flush options
  • Strong flushing power
  • Flushes away poop on low water usage
  • EverClean coated surface prevents stains + ensures crystal clean bowl every time
  • Comfortable chair height seating
  • 5-year warranty on all mechanical parts
The Bad
  • Seat needs to be purchased additionally.
  • You’ve got to keep the flush-button down a little longer than you would for a traditional push lever.

TOTO CST243EF#12 Entrada Two-Piece Round

The TOTO CST243EF is a round two-piece toilet that combines water-efficiency with power flushing. The toilet features an E-Max Flushing Technology, creating a strong flush by only consuming 1.28 gallons of water. As a result, you get a superbly clean and clog-free water bowl with no stains and mold build-up.

The Toto Entrada is built ‘really’ well and is professionally engineered to do a fantastic job. If your old toilet uses more water and gets clogged frequently, or if you have kids in your home who forget to keep the flush lever pushed for several seconds for proper solid waste disposal – this product is one of the better options because it produces a strong flush by pressing the level gently and delivers performance without consuming a lot of water.

What Customers Say About This Product?

The TOTO CST Entrada has a 4.3-star rating on Amazon with up to 90% positive user reviews. The product offers unprecedented performance, longevity, and reliability, reflecting the finest in customer satisfaction.

Customers say that the product offers everything one could expect from a quality toilet. Its ability to powerfully flush away solid waste in a jiffy makes it a true masterpiece. The only problem reported with the purchase is the exclusion of the seat (that needs to be purchased separately).

The Good
  • Consumes only 1.28 GPF
  • Clean and modern round design
  • E-max flushing system
  • Universal height
  • Affordable
The Bad
  • Toilet seat not included. Needs to be purchased separately.
  • Though a single flush removes everything from the bowl, the water does not scrub the complete inner toilet bowl surface area.

Kohler K3946-RA0 Adair Toilet

The Kohler K3946 is a combo of water efficiency, pressure-assisted powerful flushing, modern design, and ultra-comfortability. It’s a complete package for your bathroom and offers much more than you can expect from an affordable low-flow toilet!

Kohler’s one-piece single toilet features a unibody design that gives a very nice feel to the look of the bathroom. However, the product’s main specialty lies in its water-conserving and powerful flushing abilities. This toilet is capable of flushing poop on a mere 1.28 gallons of water consumption. It’s Aqua Piston Flushing System helps pressurized water to flow inside the toilet bowl from all directions. The result is effective flushing and a clean bowl.

Other specialties of this water-saving toilet seat are a one-piece design with less exposed seal material, a quiet-closing seat, and a chair-height seating.

What Customers Say About This Product?

The Kohler K3946-RA0 has a 4.3-star rating on Amazon and 93% positive client testimonials.

Customers have expressed satisfaction with the purchase of this product. A majority of the buyers are happy with the powerful 1.28 gpf flushing ability of this toilet. Customers say that this product is okay in their books as long as they don’t have to deal with a plunger. Plus, the one-piece design and quick unlatch seat provides for excellent cleaning.

The Good
  • Water-saving flushing mechanism
  • Consumes only 1.28 gallons of water per flush
  • Comfortable chair-height seating
  • Seat quiets closely
  • AquaPiston Flushing Technology allows for toilet bowl flushing from all sides
  • Durable one-piece design with 90% less exposed seal material
  • Longer maintenance-free life
  • Eliminates clog without wasting water
The Bad
  • Some customers have complained that the inside of the toilet bowl has been designed somewhat flatter, which causes the toilet paper to sit on the surface. A second flush might be needed so that the paper slips away into the drain.

🌟Pick Of The Season

The Best Heavy Duty Water-Efficient Toilet for Commercial Applications

TOTO CST743S#11 Drake Round

If you are looking for a power-flushing toilet for high traffic bathrooms such as those located in shops, offices, malls, and restaurants, or simply the one that tends to get lots of visitors – the TOTO’s CST743S#11 Drake model stands as the No.1 heavy-duty water-efficient toilet.

The toilet features TOTO’s famous G-Max Flushing system and a classic high-profile style that is efficient and robust enough to handle large quantities of waste, by just consuming 1.6 gallons of water per flushing.

This high performance 1.6 gpf G-max flushing system is further combined with a 3” wide flush valve (a 125% wider flush valve than the standard), extra-large siphon jet (for increased water flow, drawing water in quickly and drawing water out forcefully), and a large trapway (for better flushing) so that even the toughest of solid poops is quickly disposed of down the drain line in just one water-saving flush.

Why Is It The Best?

The team @thebestflushingtoilet got a chance to hands-on experience the TOTO CST743S#11 Drake and was astounded by its performance. This toilet succeeds against all types of stools.

The “greater mass stool”, such as one may get from eating lots of roughage, is the most problematic stool for nearly all toilets. The concern with this sort of stool is that the stool tightly covers the bottom portion of the toilet bowl like a plug. Most toilets (even pricey ones) have a hard time dealing with such stool. It would often take a plunger to help stuff along, several flushes, or even a huge bucket of water to be poured directly.

The TOTO CST743S#11 is built such that as the flush happens, there is a heavy pulse that emerges from below the stool plug and raises the whole mass slightly such that the usual flush process can continue unhindered.

Secondly, enough water stays in the bowl to keep the stool from leaving streaks. In most bowls, there is always little water in the underneath rim, and streaking and moving of stools is often a concern. Even certain bowls are not engineered well to hold the stool suspended in water. With this in mind, this toilet was made. Individuals who don’t like to clean streaks can welcome this design in their bathrooms.

What Customers Say About This Product?

The TOTO CST743S#11 is an excellent choice for both homes and high-traffic commercial spaces. The product has a 4.6-star rating on Amazon with 96% of positive reviews testifying about the robust functionality, durability, and reliability of it.

Customers are all praises for this toilet, terming TOTO’s Drake line one of the best productions of this century so far. Users say that it is an extremely efficient easy flush 1.6 toilet that disposes of large deposits in a jiffy. Customers say that it can easily flush a full bowl and a lot of toilet paper. Some also say that it’s been several months with this toilet and they are yet to see this toilet struggling!

The Good
  • Heavy-duty, water-saving toilet
  • Handles tough solid waste without struggling
  • Clog-free
  • Prevents poop streaks
  • Ideal for high-traffic bathrooms
The Bad
  • You have to pay a little extra for this model.

How do low-flow toilets work on low-water consumption?

Low-flow toilets are engineered well to deliver powerful flushing on low water consumption. This is made possible through their pressure-assisted mechanism that combines both water and air pressure to push solid waste down the drain lines. Other features like wider flush valves, large trapways, and unique design also contribute to creating a powerful flush on low-water usage as well as resisting drain clogs.

How much yearly water savings can I expect from low-flow toilets?

The 90’s toilets use 3.5 to 7 gallons of water per flush, as compared to today’s high-efficient toilets that use between 0.5 to 1.6 gallons of water per flush. On an average calculation, a household can expect at least 50% less water consumption and 50% less yearly water bills by investing in today’s low-flow water-efficient toilets.


Buying a water-efficient toilet is the best purchase decision for your bathroom. Not only do these toilets consume less water, but they also provide powerful flushing for all waste types. Extremely water conscious individuals can go with a dual-flush toilet like the Niagara Nano or Kohler 3901. And those looking for something truly exceptional in terms of flushing, especially for high-traffic bathrooms, can go with the TOTO CST743S#11 or the American Standard 2887218.021 H2Option. All the toilet models listed here have made it to the “top best” list after hands-on testing and sifting through hundreds of testimonials. Therefore, you are guaranteed to get the best value on your money.