6 Best No Tank Toilets: Pros and Cons, Buying Guide, FAQs and More

Best No Tank Toilets
Today, no tank toilets are excessively trendy because of more reasons than one. They are fashionable, compact, and incredibly high-tech in their design and functionality. As is clear from the name, the no tank toilet comes sans a tank. Unlike the standard tank toilets with water in them, the no tank toilet will directly connect to the water supply pipes. They utilize the small electric pumps for drawing water from the pipes and transferring it into the bowl.


One of the most critical advantages of the modern tankless toilet is that they leave you with adequate space in your washroom, wherein you can accommodate other fixtures, such as shelves, tables, and cabinets.


Now, when you shop for the no tank toilet, you have to be very careful. There is a diverse variety available in the modern tankless toilets. So, how amongst them should you pick the best tankless toilet?


In all honesty, we understand your concern, and this is why we did some research, read through many tankless toilets reviews, tried and tested some of the no tank toilet ourselves, and sought expert guidance on the same. We have come up with our list of the six best tankless toilets based on this extensive research. So, let us get started and address our tankless toilets reviews one by one.


Hopefully, when you go through our tankless toilets reviews, you will be better armed to make a more informed decision on your pick.



Table Of Contents



Best Tankless Toilet Compared


Product Rating Water Consumption Shop Now
Top Winner

Saniflo 023 Sanicompact Self-Contained Toilet

Saniflo 023 Sanicompact Self-Contained Toilet


1.6 Gallons per Flush Check price
Runner Up

Toto MS992CUMFG#01 Neorest bathroom-hardware

Toto MS992CUMFG#01 Neorest bathroom-hardware, Cotton White


1.0 Gallons per Flush Check price
WOODBRIDGE B-0960S B0960S Smart Bidet seat Toilet

WOODBRIDGE B-0960S B0960S Smart Bidet seat Toilet with Integrated Dual Flush with Remote Control, White


1.28 Gallons per Flush Check price
KOHLER K-5401-0 Veil Skirted 1 Piece Smart, Dual Flush Toilet

KOHLER K-5401-0 Veil Skirted 1 Piece Smart, Dual Flush Toilet in White


1.28 Gallons per Flush Check price
Best Medium Budget

Toto MS920CEMFG#01 1.28-GPF/0.9-GPF Washlet

Toto MS920CEMFG#01 1.28-GPF/0.9-GPF Washlet with Integrated Toilet G400, Cotton White


1.28 Gallons per Flush Check price
Best for Professional Use

Bio Bidet IB835 Fully Integrated Bidet Toilet System

Bio Bidet IB835 Fully Integrated Bidet Toilet System, White


1.6 Gallons per Flush Check price


6 Top Tankless Toilets

1. Saniflo 023 Sanicompact Self-Contained Toilet

Top Winner


Saniflo 023 Sanicompact Self-Contained Toilet Check price on Amazon


Do you seek a self-contained and high-performance no tank toilet? If yes, the Saniflo 023 sanicompact self-contained toilet can be the perfect pick for you. First things first, one of the best things about this model is its exquisite water conservation technology. The flushing toilet is hugely effective and utilizes only one gallon of water per flush. Its flushing mechanism has an electronic timer, which monitors the flow rate.


Furthermore, this no tank toilet also has an integrated pump hidden under the bowl base and caters to the efficient waste evacuation from the unit. Its macerator empties the waste up to the discharge line owing to the tremendous power it showcases. Beyond its compact and space-saving design, the macerator makes this Saniflo 023 an ideal pick and the best tankless toilet for remote locations, such as under the stairs, garage, and even the basement.


When we read through different Saniflo 023 tankless toilets’ reviews from the customers, we realized that the customers widely appreciate its material composition. Well, it is indeed for a worthwhile reason as the kind of durability it offers is unprecedented. Further, it does not require extreme maintenance, making it a top pick for the customers. Beyond that, this toilet also has a very comfortable height, making it accessible even for the physically challenged.


This is indeed the most affordable option on the best tankless toilet list. More so, on our tankless toilets reviews, this one has ranked right at the top. It is because of the many features and its two-year warranty. You can even raise this warranty to three if you wish to register after the purchase.


Key features

  • Uses a minimum amount of water
  • Vertical pumping up to 9-Feet and 100-Feet horizontally
  • Uses just 1-Gallon of water per flush
  • Bowl Height without Seat:18.5 inches
  • Dimensions (H × W × D): 18¼ inches by 14¼ inches by 19½ inches
  • Stylish toilet seat with chrome hinges included.
  • Allows the connection of a sink
  • Water Consumption: 1.6 GPF
  • Made of porcelain material
  • Two-years warranty



  • Affordable
  • Eco-friendly
  • Ideal for fitting in tight spots
  • Excellent water conservation
  • Compact and stylish design
  • Electronically regulated flow
  • Easy to connect with sink



  • Inadequate installation information

Check price on Amazon

2. Toto MS992CUMFG#01 Neorest bathroom-hardware, Cotton White

Runner Up


Toto MS992CUMFG#01 Neorest bathroom-hardware Check price on Amazon


Next on our tankless toilets reviews list is the Toto MS992CUMFG#01. It is famous for being the perfect solution to all your bathroom needs. The Neorest tankless toilet is optimized to offer everyone comfort and luxury. This tankless toilet is designed with top-quality materials and technology, which assures superb functionality and durability.


It has a 20-inch seat height, which makes it quite higher than the regular toilets, making it relatively easy for you to sit and stand. Hence, this one is the best tankless toilet for people who suffer from mobility issues. The no tank toilet comes with remote control, which allows you to customize the flushing mechanism and the water temperature. It is a handheld device, which lets you understand the functions at a glimpse. This is not all. The modern tankless toilet comes with a motion sensor, which automatically tends to turn the light on, and opens the lid as you approach, and shuts the lid as you leave the seat.


As you sit on its seat, the electrolyzed water spray covers the bowl, which helps keep it clean and fresh. It also has a Sana gloss surface, which prevents the dirt from sticking, thereby lowering the time you spend cleaning.


Just about everything about this no tank toilet is incredible and that is the reason for its top ranking in our tankless toilets reviews. You will love and appreciate the night light, which makes navigation simpler, and the preheated seat is warm and comforting for the butt, especially in the winters. After you sit down, the sensor beneath the seat begins to exhaust the fan, which helps you eliminate any foul smell.


Overall, it is a great pick and offers a hands-free automatic flush for hygiene and convenience. Adding to it, it has a dual-flush toilet, which gives you the flexibility to pick how much water you spend.


Key features

  • Cyclone siphon jet flushing system
  • Heated seat with temperature control
  • Water consumption: 1.0 gallons per flush
  • Convenient remote control
  • Ultra-high efficiency (1.0GPF/3.8LPF and 0.8GPF/3.0LPF)
  • Hands-Free Automatic Flush
  • Gentle, aerated water spray with accommodating oscillating and pulsating features
  • Three years warranty



  • Dual flush mechanism
  • Gentle nightlight
  • Innovative features
  • Auto flush technology
  • Auto open and close lid
  • Customizable settings
  • Remote controller



  • Lid is open during the flush

Check price on Amazon

3. Woodbridge B-0960S B0960S Smart Bidet Seat Toilet With Integrated Dual Flush With Remote Control, White


Woodbridge B-0960S B0960S Smart Bidet Seat Toilet Check price on Amazon


Ranking at number three in our tankless toilets reviews is the Woodbridge B-0960S B0960S. It is a tankless toilet and a bidet combo. This is an elongated toilet, which measures a little under 29-inches in length. Though the unit seems a bit longer than the others included in our tankless toilets reviews list, Woodbridge makes up for the extra inches by ensuring that the rest of the toilet is indeed very sleek and aesthetic. More so, it is relatively easy to clean. It is also free from stubborn crevices, which could conceal the bacteria.


After you open the lid, you will find a bunch of handy features. The bidet system is powerful, and in this price range, this does seem like a remarkable feature. Further, its main cleaning wand is adjustable and is capable of performing different cleaning functions. It also has a feminine wash wand upfront. There are dryer and an air deodorizer included, which can assure better comfort. Its seat also comes with abundant comfortable and convenient features. It has a sensor to open and close automatically, which also adds to its ease and convenience. After you sit down, you can turn the heating elements on to yield a soothing warmth. You do not even have to employ the included remote to initiate a flush. The sensors will auto-detect when you begin to flush. The sensors will detect when you get off from the toilet and take care of that for you.


Key features

  • Seat activates the self-cleaning spray or bidet wand.
  • Lid opens automatically
  • Deodorizer effectively cleans the air.
  • The carbon filter helps get rid of any unpleasant odor.
  • Quiet and powerful Siphonic 1.6 GPF/1.0 GPF dual flushing
  • Special designed, contoured heated seat and powerful warm air dryer
  • Certified to UL1431, CSA C22
  • Complies with IPC, UPC, NPC, IAPMO-EGS



  • Multiple cleaning modes available
  • Full skirt
  • Elongated bowl
  • Floor-mounted
  • Dual-flush mechanism
  • Built-in air deodorizer and dryer
  • LED night light
  • It comes with a touchscreen remote
  • Integrated bidet
  • Automatic flushing mechanism and lid opener



  • It uses 1.6 gallons of water for a full flush
  • Has lower water level in the bowl

Check price on Amazon

4. KOHLER K-5401-0 Veil Skirted 1 Piece Smart, Dual Flush Toilet in White


KOHLER K-5401-0 Veil Skirted 1 Piece Smart Check price on Amazon


When it comes to top-notch toilets, Kohler is no stranger to us. This modern tankless toilet provides us with immense functionality and abundant useful features. This modern tankless toilet comes with an integrated customizable bidet.


Further, in addition to letting you change the wand position for a superbly clean experience, this toilet provides you with several different spray patterns and pressure settings to pick from. All said and done, this one also comes with an air dryer for high-comfort.


From the performance perspective, this toilet does a great job too. It may not have the most vigorous flush available, but it is still very efficient. One of the reasons why this toilet has received a decent position in our tankless toilets reviews list is because it is very low-maintenance. Cleaning it is also very easy and effortless, thanks to the bowl’s smooth lines and the wrap-around skirt.


Key features

  • The self-cleaning function uses UV light and electrolyzed water systems.
  • Adjustable temperature settings
  • Compact
  • Dual flush offers a choice of 0.8 or 1.28 gpf
  • Elongated bowl, which is roomy and assures more comfort
  • Streamlined one-piece toilet with integrated cleansing
  • Tankless design with direct water supply
  • Automatic deodorization system
  • Front and rear wash modes
  • Can get warm water for cleansing
  • Motion-activated, hands-free opening and the closing of seat and cover
  • Heated seat with adjustable temperature settings
  • Warm-air drying system
  • Quiet-Close
  • LED lighting illuminates the bowl to serve as a nightlight
  • Touchscreen LCD remote
  • Integrated bidet functionality
  • Adjustable water pressure, spray shape, water temperature, spray position, pulsate and oscillate functions.



  • Comes with motion-activated lid
  • Simple skirted design
  • Floor-mounted
  • Integrated bidet
  • Uses 1.28 gallons for full flush
  • Bowl light
  • Comes with touchscreen remote
  • Adjustable bidet wand with several cleaning modes
  • Heated seat and air dryer
  • Relatively easy to install



  • Heater and light prone to issues
  • Weaker flush compared to other options
  • Higher price tag

Check price on Amazon

5. Toto MS920CEMFG#01 1.28-GPF/0.9-GPF Washlet with Integrated Toilet G400, Cotton White

Best Medium Budget


Toto MS920CEMFG#01 1.28-GPF/0.9-GPF Washlet Check price on Amazon


At number five on our tankless toilets reviews list is again a Toto toilet is indeed an advanced pick for the users. It is suitable for just about everyone. Compared to the earlier Toto model, this one is undoubtedly cheaper, but this one does not have the night light feature. However, it is equipped with several other smart features to cater to your hygiene and comfort. This best tankless toilet is well-equipped with automatic functions, which can be modified to cater to your preferences.


Its seat opens and closes by itself. So, after you are done, a wand pops, which will perfect the cleaning for you. One of the best aspects of this no tank toilet is selecting your requisite water pressure and washing position. Its auto-drying session does seem to take a little extra time. Thus you have to be patient or reach out for a tissue paper.


There is a little downside to this otherwise best tankless toilet. You do not have an option to adjust the lid sensitivity. The problem is it opens up anytime someone walks into the washroom. However, the performance and functionality are enough to make you fall in love with it.



Key features

  • WASHLET bidet seat toilet comes integrated dual flush toilet that employs the 3D Tornado Flush technology
  • PreMist function and CEFIONTECT glaze provides the toilet bowl a lubricious quality
  • Rear and front warm water cleanse with five adjustable temperature and pressure settings
  • Features luxury auto open and close lid
  • WaterSense certified
  • Warm air dryer
  • Heated seat
  • CAL Green compliant
  • Water consumption: 1.28 GPF



  • Auto open and close lid
  • Heated seat
  • ADA-compliant
  • Self-cleaning wand
  • 3D tornado flush
  • Automatic deodorizer
  • Universal height
  • Cefiontect ceramic surfaces
  • Auto dryer



  • Inability to control the lid’s sensitivity
  • Dryer takes time

Check price on Amazon

6. Bio Bidet IB835 Fully Integrated Bidet Toilet System, White

Best for Professional Use


Bio Bidet IB835 Fully Integrated Bidet Toilet System Check price on Amazon


At number six on our tankless toilets reviews is the Bio Bidet IB835 F no tank toilet. It is unquestionably one of the best models that you can find on the market today. You will quite love and appreciate the sleek and classy design of this no tank toilet. This makes the unit a phenomenal addition to your bathroom. This set of bidet and toilet is indeed supremely functional and will assure a superb and fully automated experience. Further, the toilet has a sensor, which quickly activates the functions keeping in view your body movements.


Further, this no tank toilet also comes with an auto flushing system, which can help you conveniently flush off the waste. The flush button is also present for people who like to take care of it manually. It comes with two nozzles, which offer different washing systems for both men and women. The seat and the water both feel warm, which is indeed remarkable, especially on cold days.


Its integrated remote lets you have absolute control over all the functions, and with the LCD window, you can check your settings as and how you like it. Compared to the many options mentioned on this tankless toilets reviews list, this one is fairly easy to install. More so, the step-by-step guide provided on the manual only simplifies the whole task.


There have been complaints from the customers that the toilet fails to flush thoroughly, but there is a manual option to fix this issue. At its cost, it does give you a good value for money.


Key features

  • Maximum Weight Capacity: 330 pounds
  • Elongated shape
  • Floor-mounted installation
  • Three years warranty
  • Fully integrated
  • Warm air dry
  • 2 in 1 nozzle
  • Auto wash
  • Luxurious low profile
  • Digital body sensor
  • Auto flush
  • Pulsating/Massage
  • Heated seat
  • Wide cleaning
  • Deodorizer
  • Self-clean
  • Power save
  • Wireless remote



  • Simplified installation instructions
  • Auto open and close seat lid
  • Compact and classy design
  • Eco-friendly and energy saving
  • Trouble-free operation
  • Adjustable temperature and pressure
  • Unisex nozzle system
  • Smart remote controller



  • Reports of incomplete flush
  • Expensive

Check price on Amazon


How Does a Tankless Toilet Work?

A tankless toilet receives water directly from the supply line instead of the water tank which is actually missing in these toilets. The supply water comes in with enough pressure to flush out the toilet bowl clean. In fact the pressure is higher than the regular tank water.


Thus, please note that even the best tankless toilet will perform well in a building with good water pressure.



No Tank Toilets – Advantages And Disadvantages

If you are interested in shopping for one of the toilets from the listed options, you would want to know their advantages and disadvantages. So, let us address them one by one.



  • The wall-mounted tankless toilets are smaller than the regular toilets, but they still perform great.
  • Most of the no tank toilets do not need a pump, yet they yield a super powerful flush.
  • Since the supply pipe is in the wall, the chances of leakage are less.
  • They do not need a large quantity of water.
  • They work fast because they take lesser time to refill. It comes in handy when you have more people in line waiting to use the facility.
  • You can find it globally.
  • They are easy to maintain and clean.
  • They are stylish and have higher design flexibility.
  • They leave you with more space in the toilet.



  • In most cases, the toilets depend on power to function. So, they work only when there is a power supply.
  • The installation process is complex and may need a technician’s assistance.
  • They are pricey.
  • Not suitable for homes with low water pressure.



Buyers Guide

In our tankless toilets reviews, we have reviewed the six best tankless toilets. Now, most of you may be facing the problem of picking the best tankless toilet from this list. Well, see, it is our firm belief that every customer has different needs, budgets, bathroom space, and aesthetic sense.


Consequently, what may be the best tankless toilet for one person might not qualify for others. We have tried to cover some of the most versatile choices through this article, making it easier for you to pick one from the rest. However, to make your pick, you also need to know the right way to make the pick.

Here we are presenting an easy-to-understand buying guide, which will make shopping for the modern tankless toilet easy.



Why should you pay for something that lags in quality? The first thing you need to check is the build quality of your no tank toilet — the quality impacts the durability, which consequently affects the toilet’s performance. Thus, we recommend shopping for a model which offers the best quality.


Power supply

To initiate the flushing function, you require a power supply in your no tank toilet like in an upflush toilet. As for the power supply, if you do not possess the regular one at your home, you must avoid shopping for the electrically operated modern tankless toilet. Some of the tankless toilets even employ a battery that can flush a manual power outage.



All the best tankless toilets are either wall-mounted or floor-mounted. Thus, you have to consider the wall’s ability to support the weight and the toilet’s design before picking any toilet.



These are installed to hang on the wall of the bathroom. They are suitable for homes that have little space. They have a sleek design and are relatively easy to clean.



When you have adequate space in your bathroom, you can opt for a floor mount model. This one is fixed to the floor. Thus, it is quite easy to install when compared to the wall-mounted models. However, once installed, it is not easy to adjust the height.



Since the no tank toilet comes sans a tank, you can accommodate them in tight spaces. These tankless models are perfect for homes with small bathrooms. You can find them in several different shapes and sizes. So, before you pick the best tankless toilet for your home, you should put in some time and effort to compare different models and choose one that best fits.


Flushing mechanism

You need to be mindful that the toilet’s flushing mechanism is powerful enough to wash out all the solid waste in a single flush. Some models tend to look appealing, while others take about three to four flush times to get rid of the dump. Thus, when you need the best tankless toilet, you must avoid the ones that take a lot of effort to get rid of the dump.


Water Consumption

We believe that you would want to save big on your energy bills. Thus, it is quintessential to pick the no tank toilet that assures high water savings. It would be best if you opted for a quality flush valve in this case. Pick a model that conserves water and has adequate pressure to eliminate the waste quickly. When you have a slow filling valve for the regular toilets, it is easy for you to fix it. However, to do this, you will have to be a certified plumber.


Seat height

The different tankless commodes come with different heights. The heights usually go from 15-20 inches. If you have to share the bathroom with others, especially someone who has a mobility issue, you must opt for modern tankless toilet with a comfortable height.


Bowl shape

Typically there are three shapes found in the modern tankless toilets – elongated, round, and compact elongated.



These are ideal for people regardless of their age as it offers good comfort. The bowl in these tanks usually falls between 28 to 31-5/8 inches and is measured from the back to the nose.


Round shape

If you shop for this category of toilets, they will usually measure about 28 to 31 inches. Though they can help you save more, they are not very comfortable to use.


Compact elongated shape

It is clear from the name that it is a small-sized toilet but has an elongated shape. So, the comfort is good. It is ideal for homes that have small bathrooms.



The best tankless toilet is a supremely comfortable one. Thus, you need to pick a water closet, which gives you the required comfort. Before shopping for your ideal model, you can compare the different features of the different units. Check the degree of relaxation they offer. Some of the specifications that you can watch out for are – warm water, heated seats, night light, auto-open lid, self-cleaning, auto-close lid, comfortable height, and much more. All six models that we have mentioned above are supremely comfortable.


Ease of maintenance

Usually, a no tank toilet is more accessible when it comes to cleaning. However, the accessibility depends on the finish, design, and shape. Unlike the plumbingless toilet or the no septic composting toilet models, these are relatively easy to clean. Further, the Sanagloss finish ensures that the dirt does not stick to the bowl’s surface, thereby reducing the cleaning rate and the need for using the harsh chemicals.


Advanced features

In most cases, the toilet’s price tag will be determined by the extras that will come along. So, naturally, if you shop for the best tankless toilet that provides you with a heated seat, remote controller, and an auto flushing mechanism, it will undoubtedly be pricier. Further, specifications, such as automatic open and close lids, night light, and auto flushing, are vital for homes with physically challenged people and kids.


Tankless Toilet Installation Tips

So, now that you have decided to get a tankless toilet, you will have to work towards the next phase, the installation. So, whether you are installing a commercial tankless toilet for the first time or replacing the old one, these tips will come in handy.

  • Check if the home’s drainage system will support the new lavatory. You need to ensure that your building pipes are robust and can withstand the toilet’s water pressure. To yield the best results, you need at least a one-inch pipe.
  • When you are replacing an old tank toilet with a new, improved tankless one, there is a good chance of some damages taking place. Consequently, you have to overhaul the plumbing installation.
  • For proper toilet replacement, you have to examine the flange for damage thoroughly. In case the flange is cracked or damaged, it must be repaired or replaced immediately.
  • Always ensure that you set the closet bolts upright within collar slots of the flange before you place the brass washer around each peg.
  • Carefully examine the wax ring to assess if it is thick for the toilet to rest on.
  • Line the bowl over the bolts and rings. However, do ensure that it is nestled evenly onto the floor. Next, tighten the screws to secure the bowl.
  • Once the seat installation is done, you will have to link the toilet to the supply.
  • It is always more pocket-friendly to install the tankless toilet in a building where the power supply is adequate.



Frequently Asked Questions

Ques 1. Do no-tank toilets conserve water?

Ans. Yes, no-tank toilets help you conserve water. Each of the options mentioned above will help you do so.


Ques 2. What is the cost of a tankless toilet?

Ans. The price starts from 1000 USD and goes all the way up to 5000 USD. But you will get the value for your money.


Ques 3. Can I install a tankless toilet in my home?

Ans. In all honesty, installing a no-tank toilet in a residential home can be a bit of a concern, especially in places that receive low-pressure water. The system needs good water pressure to function right. So, this means that you will have to install a pump, which will require professional assistance. This can be quite a costly affair. To prevent this, you can examine your home’s plumbing and psi system before opting for a tankless toilet.


Ques 4. Can a tankless toilet work even with low water pressure?

Ans. It can work, but there will be some problems. Thus, it is advisable to install a pump when the water pressure is low.


Ques 5. How should I flush in a tankless toilet without water?

Ans. In this case, you will have to use a bucket and pour at least one gallon of water into the bowl.


Ques 6. Which is better tankless toilet: wall mounted or floor mounted?

Ans. If you have a small washroom, the wall mounted is better. However, if you need a toilet that you can install by yourself, a floor mounted option is recommended.



Wrapping Up Tankless Toilets Reviews

Upon installing the modern tankless toilet in your apartment, you can introduce yourself to a life-altering experience. Hopefully, our reviews above will have simplified the decision-making process for you. Each of the six toilets mentioned above are all products of high functionality, quality, and superior performance. They consume less water and are incredibly user-friendly. If you desire an affordable and reliable toilet, we recommend the Saniflo 023. You can link it to your bathroom sink, and it has an electronically controlled flushing mechanism.


Overall, if you want your toilet to work well and give you the efficiency and sophistication you expect, you can pick anyone from our list above.