We know a thing or two about finding the best low flow toilets after testing 25 unique models over 7 months. We’ve done all the legwork to help narrow down your purchasing decision and here is the complete guide to follow:
Here are the best low flow toilets you can buy in 2021:
- Best Overall: 20-inch Extra Tall Toilet
- Most Efficient: KOHLER K-3987-96 Toilet
- Best Budget Option: KOHLER K-3609-0 Toilet
- Best Overall: WOODBRIDGE T-0019
- Best Budget Option: HOROW HWMT-8733
- Best For Tight Places: Saniflo 023 Toilet
|Top 6 Best Low Flow Toilets|
|20-inch Extra Tall Toilet||Read Our Review|
|KOHLER K-3987-96 Toilet||Read Our Review|
Best Budget Option
|KOHLER K-3609-0 Toilet||Read Our Review|
|WOODBRIDGE T-0019||Read Our Review|
Best Budget Option
|HOROW HWMT-8733||Read Our Review|
Best For Tight Places
|Saniflo 023 Toilet||Read Our Review|
Best Overall: 20-inch Extra Tall Toilet
- Optimal water efficiency – two flush options & 1.28 gals/full, 0.9 gal/light
- Reliable and safe to use - Accepted by CEC & Approved by Board of Registration of Plumbers GF
- Convenient to sit down/stand up – elevated riser seat
- Wish it wasn’t plastic but a brass metal handle
Everything about this low flow toilet is extraordinary.
It isn’t as inconvenient to sit down and stand up as other low toilets, all thanks to the elevated riser seat which results in extra total height (to the top of a toilet seat) is 21 inches.
Besides, this helps add extra safety for the elderly or people with back or knee issues to use it. For souped-up reliability, the 20-inch Extra Tall Toilet is accepted by CEC (stand for California Energy Commission) and approved by the Board of Registration of Plumbers GF.
It is not only water-efficient but also safe and quality to invest in.
|20-inch Extra Tall Toilet Specifications|
27 x 15 x 36 inches
1.28 gal/full, 0.9 gal/light
Dual. Lift up for full flush, push down for a light
Water economy dual flush valve
Accepted by CEC; Approved by Board of Registration of Plumbers GF
Total height to the top of toilet seat: 21"
Designed with elevated riser seat and water-efficient flush valves, the 20-inch Extra Tall Toilet is the best overall 2-piece low flow toilet that will make life easier for many years to come.
Most Efficient: KOHLER K-3987-96 Toilet
- Efficient water consumption – offer two flush options: 1.1 and 1.6-Gallons per flush
- Offer extra top area for décor/storage – left-hand nested trip lever
- Space-saving – round-front bowl
- The tip of the green lever might be small to some people’s thumb
- A bit pricey
This 2-piece low flow toilet is best for narrow baths and powder rooms thanks to its rounded-shape bowl.
It gives you to flush options: the 1.1 GPF and the 1.6 GPF. Statistically speaking, over 80% of the time, you just need to use the 1.1 GPF mode, which ends up saving lots of water and money out of your pockets.
The flushing power is great; it flushes completely every time and even the action of flushing is unexpectedly quiet.
Having the left-sided flush handle to leave room on top is necessary for décor/storage.
The design is subtle and simple, in addition to four color options, which will work well in most situations.
|KOHLER K-3987-96 Toilet Specifications|
29 x 28 x 18 inches
1.1 or 1.6-Gallons per flush
Gravity Flush Toilets
2-1/8-Inch glazed trap way
1.1 or 1.6-Gallons per flush
Left-hand nested trip lever
If you want something smaller in size, nice looking with powerful flushing abilities, and efficient water consumption to not break the bank, pick this.
Best Budget Option: KOHLER K-3609-0 Toilet
- Powerful flush - Single-flush gravity construction & AquaPiston Canister
- High water efficiency – 1.28 GPF
- Comfortable – elongated bowl
- Not include the seat and lid
- Don’t have many flush options
- Not ideal for short people
KOHLER K-3609-0 Toilet might be the most powerful and effective in flushing in our test.
It offers only one flush option of 1.28 GPF. In turn, the Single-flush gravity construction and the AquaPiston Canister, which allows water to flow 360 degrees into the bowl, create a strong siphon during the flush.
That means no need for a bunch of water, this toilet is still able to flush everything with only 1.28 GPF, making it a true budget-friendly option in the long run.
Our favorite feature about this low flow toilet is the tank bolts on the stool don’t go through it, therefore, less chance to leak.
The elongated bowl is another big bonus for bigger baths and powder rooms to provide extra comfort.
|KOHLER K-3609-0 Toilet Specifications|
28.8 x 17.6 x 30.8 inches
1. 28 gallons per flush (GPF)
1.28 GPF with AquaPiston Technology
Elongated bowl offers added room and comfort.
The comfortable elongated bowl, large waste exit, and power-efficient flush design make this low flow toilet the most budget-friendly option in the long term.
Best Overall: WOODBRIDGE T-0019
- Good water-sense, high-efficient, and reliable - Meeting the US & Canada UPC & CSA standards
- Durable and sturdy - Stainless Steel Durable Seat Hinge & High-end Soft Closing Toilet Seat
- No leaks. No clogs - fully glazed flush system
- Convenient & bang for bucks – include everything in the package
- The bottom isn’t flat
There are lots of good reasons making the WOODBRIDGE T-0019 superior to other one-piece low flow toilets in this list.
Meeting the US & Canada UPC & CSA standards is the very first bonus, which means for a good water-sense, high-efficient, and reliable toilet to try. Another bonus is the powerful yet quiet flushing.
By using a fully glazed flush system to create a strong siphon during flushing, it leaves no leaks, clogs, nor problems after use.
This toilet might be a bit expensive to some but the price has included everything for installation, including the seat, lid, and a special hand wrench tool. Moreover, the design is very sturdy, durable, and look luxurious. All-in-all, very bang for bucks.
|WOODBRIDGE T-0019 Specifications|
31 x 18 x 28 inches
1. 28-gallon flush
US & Canada UPC & CSA certified
Stainless Steel Durable Seat Hinge
High-end Soft Closing Toilet Seat
Super-water-efficient, stylish, sleek, and durable, the WOODBRIDGE T-0019 is our proud pick for Editor’s Best Overall Choice Award.
Best Budget Option: HOROW HWMT-8733
- Minimal maintenance – self-cleaning glazed surface
- Safe and durable – CEC compliant
- Wish the hose was better
If you’re in a tight budget, we highly suggest trying the HOROW HWMT-8733 as it’s priced just under $250.
Despite low pricing, it gives no compromises of quality or performance, which clearly proves through the CEC compliant and a 5-year warranty. Plus, it includes a Wax Ring, PP soft closing seat, and a self-cleaning glazed surface for ease of setup.
It gives you two flush options: the 1.1 and 1.6 GPF for water-saving.
The fully glazed flushing system gives it a powerful siphon with great resistance to clogs and leakage. Overall, highly recommended!
|HOROW HWMT-8733 Specifications|
25 x 13.4 x 28.4 inches
Dual-Flush 6lpf/4.1lpf (1.6gpf/1.1gpf), average flush 1.28gpf
Self-Cleaning glazed surface
Highly efficient Dual-Flush 6lpf/4.1lpf
For those budget-minded homeowners who are in need of an affordable one-piece low flow toilet, this model fits the bill.
Best For Tight Places: Saniflo 023 Toilet
- Small and compact - measured by 18.2 x 14.5 x 15.8 inches with 18.5-inch seat height
- Simple installation – requires no concrete breaking
- Powerful – allow for sink connection
- Phenomenally water-efficient - consumes only 1 gallon per flush
- Have a slight noise of the motor
- Wish the installation instructions were clearer
The Saniflo 023 Toilet is specifically designed for small half bathrooms. It is measured by 18.2 x 14.5 x 15.8 inches with 18.5-inch seat height and as requiring no concrete breaking, it is much easier and cheaper to install than the traditional sump pump.
Small and compact but this toilet is powerful enough to handle a sink connected to it.
The best thing is it consumes only 1 gallon per flush, becoming the most water-efficient one-piece low flow toilet here.
|Saniflo 023 Toilet Specifications|
18.2 x 14.5 x 15.8 inches
1-Gallon of water per flush
Gravity Flush Toilets
1-Gallon of water per flush
Allows the connection of a sink
We recommend the Saniflo 023 Toilet for those who are seeking an easy half bath below their sewage lines with no excessive plumbing and saving as much space as possible.
How To Choose The Best Low Flow Toilets?
There are three main types of low flow toilets:
- Dual-flush – offer two flushing power options: one brings more power and water to remove solid waste and one use less water and power to flush away liquid waste
- Pressure-assisted – use pressurized air to flush more powerfully and waste down the drain as low flow toilets are commonly less for gravity and pressure to work with due to its less water consumption.
- Gravity-assisted – the way it works is similar to the standard toilets. It takes advantage of air pressure to flush the waste and the gravity force to pull water, waste down the drain, and into the sewer system.
- This feature affects directly to the convenience and risks of getting clogged of a low flow toilet.
- At the current, there are two flushing styles: wash-down toilets and siphonic toilets. While the wash-down is superior in terms of a more powerful flushing force to prevent clogging better, it requires more regular scrubbing the bowl.
- Conversely, the siphonic toilets are prone to get clog because of its smaller trap. But it is better in creating powerful suction action to pull down all the content of the toilet and wash more completely.
Convenient & Comfort
- There are three features deciding a low-flow toilet’s comfort and convenience: rim design, seat shape, and fixture height. As this is a preference issue, we can’t discuss in detail what you should choose.
- But there are some general basic rules of thumb. Such as contoured or padded seats help relieve back pain and discomfort. Or, a taller toilet is easier to stand up, especially helpful for people with bad knees.
Which Brands Make The Best Low Flow Toiletsword?
- It’s not exaggerating to say that Kohler is an OG in the field of home products, known for the exceptional design, innovation, and craftsmanship.
- One of the biggest distributors of flooring, kitchen, and bathroom remodeling products in the USA. They’re well-loved for insane affordability along with top-notch quality because their operation progress has no middleman.
- Founded in 1958, Saniflo was one of the very first pioneers to revolutionize the sanitary fixtures market by producing the toilet macerator. After years, they release a lot more practical product lines, one of which won gold in the 2017 Ideobains innovation contest.
Are low flow toilets worth it?
Yes, they are. It’s because low-flow toilets help save a significant amount of water for flushing and over time.
What is considered a low flow toilet?
The amount of water used for flushing. Low flow toilets consume hugely less water than the full-sized model.
Do low flow toilets clog more easily?
Yes, they do. It’s started with the limited water produced by low flow toilets and the extra water absorbance of extra fluffy ultra-style toilet papers we use nowadays.
How do you use a low flow toilet?
Just push the flush knob after you use it.
While there’s no universal low-flow toilet for all applications or budgets, the selection above can afford specific demands in two categories: 2-piece and 1-piece toilets. Most of our testers agree that they’re powerful, reliable, and bang for bucks.
We hope you’ll find the best low flow toilet for your needs.