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Last Updated on November 18, 2022 by acechapman

Are you looking for a compact, fashionable, and economical toilet seat that doesn’t take up so much space and is easy to install? Then you need a tankless toilet.

A tankless toilet does not use a tank of water for flushing. Instead, they are a one-piece unit, connected directly to a water supply line that provides a measured high-pressure flow of water for every flush. Most models are a hybrid washlet (bidet) and toilet unit, the washlet utilizes the constant high-pressure water flow for effective cleansing. Since they are one-piece and do not have a tank, they are easier to install and maintain.

Most of the tankless toilet models only use the force of water to flush, however, in high rises or when connected to a low-force water supply, pumps are added to increase effectivity. Since standard toilets use as low as 10psi per flush and are tank based, they cannot be combined with a washlet (bidet).

Best Tankless Toilets Review List

Toto Neorest Dual Flush Tankless Toilet

best tankless toiletTOTO 700H Neorest tankless toilet is an eco-friendly washlet (Bidet) and toilet combined in a luxurious design. With both Universal design and ADA compatibility, this amazing piece of technology combines TOTO’s eWater+ technology, a remote control, an automatic Cyclone flushing system, and SanaGloss ceramic glaze, TOTO’s ion barrier surface coating that keeps the bowl cleaner for longer periods.

The TOTO Neorest 700H is a bidet and toilet seat combined. It provides a comfortably heated seat for those cold days and TOTO’s WonderWave technology, a spray and warm air dryer that provides a complete bidet experience. The double cyclone jet flushing system is extremely efficient and eco-friendly, and the automatic night seat control will raise and lower the seat when you approach. A nightlight softly shines on the toilet providing nighttime users with easier and safer accessibility.

Main Features:

  • Color: Cotton White
  • Double Cyclone Flushing system
  • Sleek, modernistic one-piece design
  • Elongated front bowl with heated automatic seat
  • Efficient Cyclone siphon jet flushing system (1.0GPF/3.8LPF and 0.8GPF/3.0LPF)
  • Useful remote control
  • Automatic Flushing system
  • Nightlight
  • Heated seat with temperature controls
  • Wonderware, an aerated gentle water spray with programmable oscillating and pulsating features
  • SanaGloss, ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface

Check The Price on Amazon!

TOTO Neorest Elongated Tankless Toilet and Washlet Unit

elongated tankless toiletThe TOTO Neorest MS990CGR-01 unit provides combined toilet and washlet functions that provide a comprehensive toiletry experience.  The Neorest MS990CGR model includes TOTO’s SanaGloss technology, a ceramic glaze that makes cleaning much easier, using fewer chemicals and requiring less hard brushing. The washlet cleaning mechanism also comes with an air deodorizer and dryer function. The SanaGloss provides an ion barrier shiny mold and dirt-free china surface. The cyclone flushing mechanism provides low water consumption (6 Lpf/1.6 Gpf), and the washlet has front and rear temperature and pressure-controlled water-washing features. This model comes with a heated seat automated seat opening and closing mechanism. We find this model to be a little expensive when compared with their MS950CG#01 Neorest 500 model, but both are amazing products and top-of-the-line models.

Main Features

  • Color: White
  • Double Cyclone Flushing system
  • Sleek, modernistic one-piece design
  • Elongated front bowl with heated automatic seat
  • Efficient Cyclone siphon jet flushing system (1.0GPF/3.8LPF and 0.8GPF/3.0LPF)
  • Useful remote control
  • Automatic Flushing system
  • Heated seat with temperature control
  • SanaGloss, ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface
  • SoftClose hinge system, which lowers the seat down to the bowl gently and quietly

Check The Price on Amazon!

Saniflo One-piece Tankless Toilet

best tankless toiletThe Saniflo 023 is more than a tankless toilet seat; it is a uniquely designed, compact macerator-operated toilet. This means it can be placed in the tightest, and awkward spots, even below or far from the drainage system. The macerator is a highly efficient flushing system situated at the base of the toilet and uses only 1 gallon of water per flush. Due to its unique size and abilities, the Saniflo 012 macerator will flush waste up to 9 feet above its location and up to 100 feet horizontally, making this tankless toilet the most versatile of all the seats we reviewed.

The Saniflo 023 is a perfect fixture for compact spaces or rooms, including lofts, attics, garages, and spaces that are set far from the building’s drainage system. You can connect this tankless toilet water source to a sink. The macerator is an electrically powered flushing system that is controlled by an electronic interface that measures 1 gallon per flush. The discharge elbow enables a 360-degree rotation, making assembly and connection easy and space efficient. One very good use for this tankless toilet is an assembly in any location providing ease of access for people with physical limitations.

Main Features:

  • Color: White
  • Pumping up to 9-Feet vertically and 100-Feet horizontally
  • Sink connection
  • Only 1-Gallon of water per flush
  • Small space assembly
  • Sleek modern design and highly comfortable

Check The Price on Amazon!

Bio Bidet IB835 Fully Integrated Bidet Toilet System

toilets reviewsThe Bio Bidet model IB835 is an integrated bidet and toilet system designed to deliver a state-of-the-art automated experience.  This tankless model provides a comprehensive bidet cleaning system with advanced toilet and bidet functionality. The IB835 includes a heated seat, deodorizer, dual cleansing wands, and posterior, and warm air providing a comprehensive hygienic solution. Another wonderful feature is the automated flushing system that makes Bio Bidet a hands-off experience. Combining sleek modern lines, the IB835 offers a handheld wireless remote control that allows the user complete control, adjusting every feature and function to suit their personal needs. There is so much going on over here, that we decided to list them for easier comprehension.

Main features

  • 2 in 1 unique nozzle system
  • Oscillating and pulsating water control
  • Wide cleaning washing system
  • Massage cleaning feature
  • Hands off posterior cleaning with powerful yet gentle deodorizer
  • Soft bidet cleaning with powerful yet gentle deodorizer
  • Bubble infusion with self-clean nozzle
  • User-controlled continuous warm water
  • Wireless remote with LCD window
  • AutoFlush function
  • Adjustable heated seat
  • Intelligent body sensor
  • Slow-closing anti-slam seat mechanism
  • Quick release for easy cleaning
  • Automatic power saving
  • 3-year limited warranty

Check The Price on Amazon!

TOTO 550H with eWater+ Disinfection System

floor-mount toiletAnother great victory for the US brand TOTO, with their Neorest 550H, you get the ultimate tankless toilet and bidet integrated system. As with all leading TOTO products, the Neorest 550H comes with their SanaGloss ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface; this model comes with their highest SanaGloss grade that keeps mold off as well and makes cleaning less frequent and much easier. Apart from this, the 550H model comes with TOTO’s eWater which mists the toilet bowl with electrolyzed water, this adds to the easy cleaning features that make this a leader in easy cleaning. This tankless model uses TOTO’s SoftClose seat mechanism for a quiet anti-slam experience.

Main Features

  • Highly efficient cyclone siphon jet flushing system (1.0GPF/3.8LPF and 0.8GPF/3.0LPF)
  • Three-module bidet cleansing (front, rear, soft)
  • Easy-to-read state-of-the-art remote control
  • Automatic flushing system
  • Heated seat with temperature control
  • eWater + Mist for greater bowl cleaning efficiency
  • The Wonderwave is an aerated gentle water spray with programmable oscillating and pulsating features
  • SanaGloss, ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface
  • SoftClose hinge system, which lowers the seat down to the bowl gently and quietly

Check The Price on Amazon!

KOHLER K-5401-0 Veil Intelligent Skirted Tankless Toilet

toilets with no tankKohler is a US company that provides a wide range of amazing products including this top-of-the-range tankless toilet. The K-5401-0 model is worth every cent you pay when you factor in all of its amazing features. Kohler spared no expense incorporating every technological piece of wizardry it could find into this “Intelligent” tankless system. Rather than discuss every feature, we decided to list them, making it easier to comprehend what you get.

Main Features

  • One-piece, compact toilet design with an elongated bowl
  • Integrated cleansing mechanism
  • The true Tankless design is connected to a direct water supply.
  • Dual flush technology with 0.8 gallons or 1.28 gallons per flush.
  • Warm water cleansing front and rear wash modes.
  • Adjustable position, water pressure, temperature and spray stainless steel wand with pulsating, and oscillate functions.
  • UV light and electrolyzed water self-cleaning function sanitize the wand surfaces.
  • Adjustable temperature warm-air drying system.
  • Automated deodorizing system.
  • Adjustable temperature heated seat.
  • Motion detector seat opening and closing mechanisms
  • The Quiet-Close™ lid prevents the seat and lid from slamming.
  • Bowl illuminated by LED lighting at night.
  • Remote control with LCD touchscreen
  • Power outage emergency flush feature.
  • EPA flushing guidelines WaterSense® technology, saving 20% in water usage.

Check The Price on Amazon!

TOTO Neorest 500 One Piece Tankless Toilet

toilets reviewsThe TOTO Neorest 500 is an amazing piece of technology that provides all the features you would expect from a top-of-the-range tankless toilet system. This one-piece unit provides a cyclone flushing mechanism that works so fast you get an immediate refill with no refill noise. The TOTO Neorest 500 comes with a wash feature that provides both front and rear heated water washing and an automatic air dryer with a deodorizer.

The bowl is covered with TOTO’s SanaGloss ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface, and comes with their highest SanaGloss grade that keeps bacteria and molds off as well, and makes cleaning less frequent and much easier. The Neorest 500 model comes in three different colors, so you achieve a better matching for your interior design, the colors included are Sedona beige, colonial white, and cotton. The seat and lid come with a motion-detected automatic opening and closing function incorporating TOTO’s SoftClose function.

 Main Features

  • Colors: Sedona Beige, White, and Cotton
  • Double Cyclone Flushing system
  • Sleek, modernistic one-piece design
  • Elongated front bowl with heated automatic seat
  • Efficient Cyclone siphon jet flushing system (1.0GPF/3.8LPF and 0.8GPF/3.0LPF)
  • Useful remote control
  • Automatic Flushing system
  • Nightlight
  • Heated seat with temperature control
  • Wonderware, an aerated gentle water spray with programmable oscillating and pulsating features
  • SanaGloss, ceramic glaze ion barrier maintaining a shinier and cleaner bowl surface
  • SoftClose hinge system, which lowers the seat down to the bowl gently and quietly

Check The Price on Amazon!

Price, Location, Space, and Comfort

best toilet reviews

While you might expect tankless toilets to be installed inexpensive homes due to their price, you will find many models installed in small homes and high rises. Commercial tankless toilets are one of the main features in the city of New York, where the city buildings were designed with “flushometers,” a commercial jargon for tankless units that connect directly to the main water source without mechanical pumping aids. Commercial tankless toilets were used because they were easy to install and required less maintenance. They also took up less space since they did not use a tank.

Due to the nature of the water source, tankless toilets can provide a compact solution for both male and female hygiene requirements. This raises the price to include the special washing features a “bidet” or “washlet” integrates for female use. In recent years, a great design change has become fashionable, making these tankless hybrids the desire of every household.


You will find many tankless toilets in commercial buildings since they require a high-pressure water source to be effective, most commercial buildings and some residential units have access to high-pressure water sources (15-20psi) and this type of model is called a Flushometer.

When the water pressure is lower than the 15psi limit, then the building must integrate a pumping mechanism to increase the water pressure.

The flushing control mechanism is basically a water valve built into the unit and can be either a simple system that meters out the amount of water per flow or a complex electronic one that can adjust both flow pressure and amount of water per flush.

Cheap Chinese versus Expensive American

floor moounted toiletWhen we researched tankless toilet models, we came across Chinese replicas that are offered at 20% of the real model. We strongly suggest you resist the urge to buy cheap. Cheap is too expensive! The Chinese models use poor-grade ceramics, have no modern finishes and the mechanisms are usually fake and in many cases, don’t work at all. If you fall for the cheap Chinese models, you will end up having to replace them immediately, or in the best case, within three months.

The American and European models use modern technologies, conform to regulations and international standards, and will flush from the day you install them. They will also retain their sheen, maintain their ceramic shine, and come with a guarantee.

Check out our online Toilet Buying Guide, 10 Tips to Find the Best Toilet For You!


One interesting fact about tankless units is the control they have over water usage. While the flush rate can be similar between tankless to standard models, the control of how much water you want in a flush can be regulated in some of the latest models. Water conservation is a major issue in this industry and technology is advancing fast; tankless units use the best water conservation technologies since they are directly linked to the water main and can take advantage of the pressure as well as control the flow.

Floor or Wall Mount?

toilet buying guideThe decision to place a tankless unit is dependent on two factors, the weight factor you have and the design you want to reach. If you are a heavy person, you should consider a floor-mounted toilet. If you prefer an aesthetic design and want a clean and clear floor, then a wall-mounted toilet is better.

One interesting factor is floor cleaning; if you have a floor-mounted toilet unit, there is more chance of “grunge” accumulating around the base of the unit. That is why wall-mounted toilet units offer a cleaner aesthetic and easier floor-cleaning options. Having stated this, cleaning the wall unit replaces cleaning the floor.

Tankless Toilets Pros & Cons


  • Tankless technology connects a toilet to a water main which reduces the possibility of malfunctioning tank flushing units.
  • The direct water main connection uses less water through electronically controlled mechanisms.
  • Tankless models are easier to install.
  • Most models include a washlet (bidet) utilizing the high-pressure water source


  • The washlet (bidet) hybrids are more expensive than basic toilet models
  • When there is a water outage, there is no tank to back up for that extra flush
  • If there is a power outage, technology-based features will not work

Tankless Toilet Installation Guide

Toilet InstallationInstalling a tankless toilet is generally easier than a two-piece toilet. As with any toilet system, there are only two types of installation to consider; either floor mount or wall mount. Installation requires matching up the toilet to the water source and fixing the toilet to the floor or wall which will both secure the unit as well as make it accessible to all users.

Unlike floor-mounted toilet units, wall-hung toilets require special care for weight considerations. You must remember that the toilet seat will be used by various weighted individuals, ranging from lightweights such as kids to people that suffer from obesity. When planning the attachment of a wall-mounted toilet unit, you must consider the structural forces of the wall and the bolts holding the toilet as well as the manufacturer’s specifications (weight limits).

The stages of installing a toilet are quite simple; we consider that you are replacing an old unit with a new one. Consider that you do not need to install a water tank, you just need to position your tankless toilet unit over the drainage pipes and make sure you have access to a water supply. The basic steps are:

  1. Turn off the water supply.
  2. Remove the old unit.
  3. Clean the area it was fixed in.
  4. Ready the supply and waste plumbing
  5. Connect the supply and waste plumbing
  6. Mount the toilet, install the seat
  7. For electronic units, attach the seat to a power supply

For a complete guide on how to measure the placement of a toilet seat, check our online guide. To accurately measure the height of a wall-mounted toilet seat, check out our online guide here.

Frequently Asked Questions About Tankless Toilets

Since most toilet models come with specific installation guides and user manuals, we limit our FAQ to general questions that are appropriate for all tankless toilets.

  1. How does a Tankless toilet work? Tankless toilets use a regulated flushing system that is directly connected to the water mains.
  2. I have low-pressure water, can I connect a tankless toilet? Yes, but you should consider checking to see if you will need a pump to increase the water pressure.
  3. My toilet has automatic flushing, what happens in a power outage? Any electronic device will cease to function in a power outage, including a tankless toilet. However, some models have a backup power source and a small battery that keeps the basic operations working for a short while.
  4. Do tankless toilets conserve water waste? Yes, tankless toilets provide control over the amount of water that flows through the system. The more technological ones provide full adjustable control.
  5. Is it easy to install a tankless unit? Yes, tankless toilets are single-piece items that require a standard connection to a waste outlet and a water source connection that can connect to the main water pipe or in some cases to a sink.
  6. What are the main problems with a tankless toiletThis all depends on the level of technology you invest in. The more complicated a system, the more chances you have of issues arising. For instance, a regulated flush unit can be either mechanical or electronic. If the mechanism is electronic, then power sources and programming issues can arise. If the control is mechanical, then wear and tear issues can arise.

Best Tankless Toilets Comparison Chart

ProductPriceWater ConsumptionCertificationProduct DimensionsShapeFlush TypeMaterial
Toto Dual Flush Tankless Toilet
$$$$$1 GPFWatersense32.5 x 15.5 x 21.5 inchesOvalSiphon JetCeramic with SanaGloss
TOTO Elongated Tankless Toilet and Washlet Unit
$$$$$1.6 GPFNot ApplicableLength 32-7/8-Inch, Seat Height 16-1/4-Inch, Height 22-1/4-Inch, Width 17-5/32-InchElongatedAutomatic Flush ToiletsCeramic with SanaGloss
Saniflo One-piece Tankless Toilet
$1.6 GPFNot Applicable18.2 x 14.5 x 15.8 inchesElongatedGravity Flush ToiletsPorcelain
Bio Bidet IB835 Fully Integrated Bidet Toilet System
$$1.6 GPFNot Applicable27.7 x 15.8 x 21.1 inchesElongatedAutomaticVitreous China
TOTO 550H with eWater+ Disinfection System
$$$$1 GPFWatersense27.8 x 15.3 x 21.5 inchesElongatedAutomaticPlastic,Vitreous China
KOHLER K-5401-0 Veil Intelligent Skirted Tankless Toilet
$$$1.28 GPFWatersense26.4 x 17.2 x 21.4 inchesElongatedDual FlushN / A

Wrapping Up

We reviewed quite a number of models including the best tankless toilets in the market and found that they require less space, and can be in the most confined or awkward spaces. In some instances, they can be situated far from a water source. Due to their high-water pressure feature, they provide added comfort when using a hybrid. The downside is that prices can be extremely high, well over $1,000 a unit.

1 thought on “Best Tankless Toilet Reviews & Comprehensive Buying Guide 2023”

  1. Very confused. What are the best flushometer toilets? I cant find any list of flushometer toilets and these appear to be not the same as tankless toilets.

    For example Kohler sells flushometers but apparently not the toilets. Thanks!

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