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Best One Piece Toilet Reviews 2021

Many consumers love the sleek and modern appearance of one-piece toilets. This is because one-piece toilets complement the modern bathroom interior. Unlike two piece toilets that have a tank and bowl separate, one-piece toilets come with solid construction and just one-piece that acts as the tank, seat, and base. Best One Piece Toilet ReviewsMoreover, many homeowners prefer one-piece toilets because they are easier to clean as they don’t feature nooks and crannies found in two-piece toilets. So, what is the best one-piece toilet to buy?

Related: Best Dual Flush Toilet Reviews [Most Popular 10 toilets]

With most of the top manufacturing offering one-piece toilet designs, choosing a good Flushing toilet for your home can be quite challenging.

Our Recommended Best One Piece Toilet Comparison Chart

ImageOne Piece ToiletsWater ConsumptionDimensionsMaterialPrice Idea
Overall Choice
Check Price
TOTO MS604114CEFG#11 UltraMax II One-Piece Elongated 1.28 GPF Universal Height Toilet with CEFIONTECT, Cotton White
Read Review
1.28 GPF35 x 33 x 23 inchesVitreous ChinaMedium
Modern toiletCheck PriceTOTO MW644584CEFG#01 WASHLET+ Carolina II One-Piece Elongated 1.28 GPF Toilet and WASHLET S350e Bidet Seat, Cotton White
Read Review
1.28 GPF28.3 x 17.5 x 25.6 inchesvitreous chinaHigh
Most Advanced toiletCheck PriceToto MS992CUMFG#01 Neorest 1.0 GPF and 0.8 GPF 700H Dual Flush Toilet, Cotton White
Read Review
1 GPF32.5 x 15.5 x 21.5 inchesCeramic with SanaGlossExpensive
Powerful flushCheck PriceAmerican Standard 2034.014.020 Champion-4 Right Height One-Piece Elongated Toilet, White
Read Review
1.6 GPF29.8 x 17.8 x 29.5 inchesPorcelain ToiletsMedium

So, if you’re looking for the best one-piece toilet to install in your modern bathroom, worry not as we’ve already done the research for you and came up with the 10 best one piece toilet designs on the market. We considered a number of features when choosing these toilets such as flushing power, size, comfort, height, water consumption, and eco-friendliness.

Top 10 Best One Piece Toilet Reviews 2021

I have added the most popular and best selling one-piece toilet list here.

Toto MS604114CEFG#11 UltraMax II One-piece Toilet

The Toto Ultramax II one-piece toilet features the double cyclone flushing system that creates a centrifugal action that cleans the rim and bowl properly in just one flush. The Sleek design will automatically change any bathroom where the toilet is installed and it is very comfortable. Thanks to the ADA compliant height and elongated bowl design.

Related: Toto Ultramax Review

Besides being beautiful and powerful, the Toto Ultramax II toilet design is very easy to clean as it has CEFIONTECT smooth glaze, which prevents dirt and other particles from sticking on the toilet bowl. This together with the tornado flush makes cleaning the toilet regularly to be a thing of the past and little chemicals are also utilized. It also uses just 1.28 gallons per flush and has its trip chrome lever on the left-hand side for public use.
Technical Specifications of the Toto Ultramax II Toilet

Features Ultramax II
Piece: One-Piece
Water Consumption: 1.28 GPF
Material: Vitreous China
Shape: Elongated
Certification: WaterSense
Color: Cotton White
Flush Type: Water Saving Tornado Flush system
Installation Method: Floor Mounted
SanaGloss finish: Yes
Universal Height Standard: Yes
MAP Testing Score: >= 800 (Highly Recommended)
Seat: Include SoftClose seat
Size: 28 3/8″ x 16 1/2″ x 28 3/4″(LxWxH)
Warranty : One Year Limited Warranty
Price: Toto one piece toiletsCheck Price



  • It is durably made of vitreous china material
  • It is easy to clean
  • The one piece toilet has an elongated bowl design for added comfort
  • It is a high-efficiency toilet thus saves water
  • It is ADA compliant thus it can be used by different people
  • The SoftClose seat prevents slamming of the toilet seat
  • The toilet comes with a one-year limited warranty


  • It is somehow expensive
  • The toilet is a bit loud during flushing

Kohler K-5172-0 San Souci One-piece Toilet

Kohler and Toto go head-to-head when it comes to the best toilets. The Kohler K-5172-0 San Souci toilet is another outstanding one-piece toilet. This toilet is very comfortable with its comfort height feature and it comes in a wide range of colors. Installing this toilet in your bathroom will not only change the appearance of your bathroom but as well as add a touch of elegance.

Related: Most Popular Best Compact Toilet Comparison Chart

The Kohler San Souci toilet is compact in design but still with an elongated bowl. So, you can install it in a small bathroom but still enjoy the comfort of an elongated bowl design. The toilet has an innovative aqua piston flushing technology that delivers a powerful and almost plug-free flush. While doing this, it only uses 1.28 gallons of water per flush. Unlike other toilets, you won’t have leakages as it features a robust canister design with 90% less exposed seal material.
Technical Specifications of the Kohler K-5172-0 San Souci Toilet

Features Kohler K-5172-0 San Souci
Piece: One-Piece
Water Consumption: 1.28 GPF
Material: Vitreous China
Shape: Elongated
Certification: WaterSense
Color: White
Flushing Technology: Gravity Flush
Handle/Lever Placement: Left
Bowl Height: Chair Height
MAP Testing Score: >= 1000 (Highly Recommended)
Size: 25.31 x 16.38 x 27.75 inches
Included: Bolts,Seat
Warranty : One Year Limited Warranty
Price: Kohler one piece toiletCheck Price



  • Excellent design
  • Easy to clean
  • Powerful aqua piston flushing technology
  • Saves water as it uses just 1.28 GPF
  • Comfortable toilet with an elongated bowl design
  • Toilet seat included
  • Leak-free performance


  • Installing this toilet is quite challenging and you will need help

Toto MS62621CEFG#12 Aimes One-piece Toilet

This is another amazing one-piece toilet from Toto. The Toto Aimes toilet is one of the best one-piece toilets for individuals who are looking for a flawlessly flushing toilet. It doesn’t make a lot of noise like some other units, and it clears the contents in just one flush. Apart from that, the Toto Aimes toilet is easy to clean both inside and outside. Inside, it features SanaGloss ceramic glaze that keeps the toilet cleaner for longer, while on the outside, it has a skirted design that eliminates the nooks and crannies that have to be cleaned. It is the best one-piece toilet for the money.

Related: Toto Legato Toilet Review: One-Piece High-Efficiency Toilet

The Toto Aimes is also comfortable to sit or stand up as it features a universal height with a SoftClose seat that won’t create much attention after use. With its low water consumption rate of 1.28 GPF, this is a great toilet to install in your contemporary bathroom.
Technical Specifications of the Toto Aimes Toilet

Features Toto Aimes Toilet
Water Consumption: 1.28 GPM
Pieces: One-Piece Toilet
Color: Cotton
Shape: Elongated
Material: Ceramic
Flushing Type: Gravity Flush Toilets
Certification: WaterSense
Voltage: 1 volts
Number of Handles: 1
Installation Method: floor
Dimensions: 28.5 x 17.2 x 28 inches
Warranty: One year limited warranty
Price: Toto Aimes One-pieceCheck Price



  • High-efficiency toilet
  • Easy to clean with a skirted design
  • Powerful double cyclone flushing system clears waste in a single flush
  • Comfortable elongated bowl design
  • SoftClose seat prevents slamming of the toilet seat
  • Toilets remain clean for longer with the SanaGloss ceramic glaze
  • The toilet is WaterSense certified
  • It operates almost silently


  • It is expensive

American Standard 2034.014.020 Champion-4 One-piece Toilet

American Standard champion-4 is one of the best selling one piece toilet models on the market. This comfortable and ADA compliant toilet features a 4-inch piston action accelerator that pushes water into the bowl 3 times quicker than a standard 2-inch flush valve. In addition, it has a large fully glazed 2-3/8-inch trapway that moves 40% larger mass than the industry standard. So, clogging will be a thing of the past.

Related: American Standard Champion 4 Max Reviews

The Champion-4 one-piece toilet also has an EverClean surface on the inside and outside that prevents the growth of bacteria, mildew, and mold. As a result, cleaning is greatly minimized. With an outstanding 10-year warranty, this is a great toilet to invest your money in.
Technical Specifications of the American Standard Champion 4 Toilet:

Features Champion 4
Water Consumption: 1.6 GPF
Pieces: One-Piece
Certification: ADA
Material: Porcelain Toilets
Shape: Elongated
MAP Testing Score: >= 1000 (Highly Recommended)
Flush Type: Siphon Jet
Dimensions: 29.8 x 17.8 x 29.5 inches
Special Features: Comfort HeightComfort Height
Warranty: 10-year limited warranty
Price: American Standard one piece toiletCheck Price


  • It is very comfortable with the elongated bowl design
  • This one-piece toilet is durably made of vitreous china material
  • It is easy to clean
  • The EverClean surface prevents debris, mold, mildew, and stains from sticking to the toilet
  • Easy to install with the 12-inch rough-in
  • Powerful champion-4 flushing system moves mass 70% larger than the industry standard
  • It is ADA compliant
  • It is 100 percent factory tested
  • 10-year warranty


  • It doesn’t come with a toilet seat thus you will have to buy it separately

Saniflo 023 Sanicompact Self-contained One-piece Toilet

The Saniflo Sanicompact self-contained toilet is the perfect one-piece toilet for homeowners looking for a compact toilet for their attic, garage, basement, ground floor, or for upper floor. This high-performing toilet doesn’t need a tank and comes with a push-button (air switch) on top of the bowl for flushing action and macerating pump cycle. The process is automatic and the flushing system is electronically timed to grant around 1 GPF of water to pass through the toilet.

Related: Best Macerator Toilet Review [Select Quality Upflush Toilets]

The compact toilet can as well as handle the effluent from both the toilet and sink. It also has a non-return valve, which is already assembled on the discharge elbow and it prevents backflow into the toilet.
Technical Specifications of the Saniflo 023 Sanicompact:

Features Saniflo 023 Sanicompact
Water Consumption: 1.6 GPF
Pieces: Two-Piece
Material: Porcelain Toilets
Shape: Elongated
Flush Technology: Gravity Flush Toilets
Special Features: Easy to Install, Quiet, Adjustable
Warranty: 2 Year warranty
Price: Saniflo 023Check Price


  • Low water consumption
  • Comfortable bowl design
  • Durable construction
  • Occupies very little space making it suitable for places like the attic, garage, or basement
  • It has the ability to discharge wastewater from the sink
  • Skirted bowl design for easy cleaning
  • 2-years warranty


  • It needs electricity to operate
  • It is quite cumbersome to install and you will require a professional plumber to install it

Toto MW644584CEFG#01 Washlet+ Carolina II One-piece Toilet

The Toto Washlet+ Carolina II one-piece toilet is one of the most sophisticated toilets that you will find on the market. This Washlet S350e comes with an elongated bowl design and a universal height for comfort and convenience to different users. It has Toto’s tornado flushing system that clears waste easily and only uses 1.28 GPF to-do-so.

Related: 10 Best Elongated Toilet Comparison Chart

The toilet features outstanding features like Ewater+ system, CEFIONTECT smooth glaze, and the PREMIST function, to keep the toilet clean for longer. As a result, you won’t have to clean the toilet regularly. During cold evenings or season, you will have no problem visiting the toilet as it has heated seat with adjustable settings.
Technical Specifications of the Toto MW644584CEFG#01 Carolina ii Toilet

Features Toto MW644584CEFG#01
Water Consumption: 1.28 GPF
Pieces: One Piece
Finish: Cotton
Material: Vitreous China
Shape: Elongated
Five adjustable temperatures: Yes
Number of Handles: One
Certification: Watersense
Auto open/close lid and heated seat: Yes
Automatic air deodorizer and nightlight: Yes
Dimensions: 28.3 x 17.5 x 25.6 inches
Warranty: One Year Limited Warranty
Price: Toto MW644584CEFG#01 Washlet+ Carolina IICheck Price



  • It has the powerful tornado flush system that clears contents in a single flush
  • The toilet bowl is kept clean and hygienic with the Ewater+ system
  • The CEFIONTECT glaze prevents stains, mold, and mildew from adhering to the surface
  • It is beautiful with its skirted and one-piece design
  • This one piece toilet is comfortable to use by people of all ages as it has an elongated bowl and a universal height
  • It is convenient to use as it has a heated seat with settings
  • No more slamming of the seat as it opens and closes automatically
  • EPA WaterSense certified
  • One year limited warranty


  • It doesn’t come with installation items like mounting bolts, wax ring, and water supply lines. You will have to buy these separately.
  • Considering the price of this toilet, the warranty could have been better but it only lasts for a one-year.

Kohler K-5401-0 Veil Skirted One-piece Toilet

If you want to go luxurious, the Kohler K-5401-0 will be the best toilet for you. Despite being expensive, this toilet is worth every penny as it comes with advanced features that you won’t find in your regular toilet models. For instance, this toilet features an elongated bowl with integrated cleansing. This means that you won’t need tissue paper when you visit this toilet. In addition, it has an LCD touchscreen remote in English for operating different settings.

Read More: Kohler Veil Intelligent Toilet Review

Moreover, this high-end toilet comes with LED lighting that illuminates the bowl, thus you will have no problem identifying it. The toilet seat is heated with adjustable temperature settings. Other features that make it be exceptional include water pressure, warm air dryer function, pulsate and oscillate functions. Overall, the Veil intelligent is a great toilet for a person looking for comfort and great aesthetics in their bathroom.
Technical Specifications of the Kohler Veil Intelligent Toilet

Features Veil Intelligent Toilet
Water Consumption: 1.28 GPF & 0.8 GPF
Pieces: One-Piece
Color/Finish: White
Material: China
Certification: Watersense
Bowl Shape: Elongated
Flushing Type: Dual Flush Toilets
Included Components: 1
Gallons Per Flush: 1.28 or 0.8
Weight: 110 pounds
Dimensions: 26.4 x 17.2 x 21.4 inches
Warranty: One-year limited
Price: Kohler K-5401-0 VeilCheck Price


  • Durable toilet
  • EPA WaterSense certified
  • LED lighting for a nightlight
  • Compact and comfortable
  • Easy to control with the touchscreen LCD remote
  • Easy to clean and hygienic hands-free opening and closing
  • One-year warranty


  • It is quite expensive
  • Needs time to learn how to use it

Toto MS992CUMFG#01 Neorest best One-piece Toilet

The Toto Neorest one-piece toilet is the most versatile toilet on our list. It is also the most expensive but worth the money. This high-quality smart toilet from Toto comes with a double cyclone flushing mechanism for ultra-high efficiency. A partial flush uses only 0.8 GPF, while a full flush uses 1.0 GPF. This makes it also an eco-friendly toilet and it doesn’t come with a toilet tank. It is one of the most powerful best one-piece toilet from Toto brand.

Read More – Toto Neorest 700H Dual Flush Toilet and Washlet Review

After using this toilet, it automatically flushes making it be very hygienic. It also has a comfortable elongated bowl with a SoftClose seat that prevents slamming. When it is cold, you can turn on the heated toilet seat and be comfortable. The convenient remote allows you to change the temperature as you wish for a better experience. With these and many other features, the nearest toilet brings a new experience into the bathroom that hasn’t been seen before.
Technical Specifications of the Toto Neorest 700H Toilet

Features Toto Neorest 700H
Pieces: One-Piece
Water Consumption: 1.0 GPF & 0.8GPF
Color/Finish: Cotton White
Shape: Oval
Material: Ceramic with SanaGloss
Certification: Watersense
Flush Type: Siphon Jet
Power Source: Corded-electric
Voltage: 120 volts
Dimensions: 32.5 x 15.5 x 21.5 inches
Warranty: 3-year limited(residential). One year limited(commercial)
Price: Toto MS992CUMFG#01 NeorestCheck Price



  • Exceptional oval-shaped toilet beautifies the bathroom
  • Ultra-high efficiency toilet
  • Comfortable elongated toilet design
  • Hands-free operation as it has a remote control
  • Heated seat for added comfort when the toilet is cold
  • Powerful flushing system clears waste in a single flush
  • 3-year warranty


  • It is costly
  • It is quite a challenge to use by first-timers and needs time to learn it

WoodBridge T-0001 Dual Flush One-piece Toilet

WoodBridge T-0001 dual flush toilet is sleekly designed and will easily blend in any modern bathroom. This luxurious toilet comes with an elongated bowl for added comfort with a soft closing seat to prevent slamming the seat. It also has powerful flushing that clears the toilet bowl in just one flush but at the same time, it is very silent. Therefore, you won’t have clogs or leaks like in some toilets.

Related: Most Popular Modern Toilet list here https://bestflushingtoilet.org/best-modern-toilet

Besides, the toilet is also easy to clean as it features a skirted design with no corners or grooves to take up your time. With a water usage rate of 1.6 GPF/1.0 GPF, you will end up saving water in the long run.
Technical Specifications of the Woodbridge T 0001 toilet

Features Woodbridge T 0001
Pieces: One Piece
Water Consumption: 1.28 GPF
Material: Ceramic
Finish/Color: Pure White
Shape: Elongated, Comfortable Height, Easy to clean shape
Flush Type: Siphon Jet, Dual Flush
Included Components: Soft closing seat, Wax rings, and bolts
Warranty: 5 year limited warranty
Price: WoodBridge T-0001Check Price



  • Dual flush system
  • Elongated bowl for comfort
  • High-end soft closing seat prevents slamming
  • Easy to clean with its skirted design
  • Outstanding one-piece design matches with most modern bathrooms
  • EPA WaterSense certified
  • 5 year limited warranty


  • The flush buttons on top of the toilet are too small and need one to press for long in order for the toilet to flush
  • It needs professional installation and it is quite heavy for one person to install it

Toto Carlyle II One-piece Elongated 1.28 GPF Toilet

The Toto Carlyle II is a nice toilet for homeowners looking for an affordable but still quality toilet to add in their bathroom. It is of a universal height and features an elongated bowl design for comfort. The Tornado flushing system is very powerful and together with the CEFIONTECT glaze, they clear the waste perfectly leaving the toilet clean. On top of that, it has a soft closing seat and it is DA compliant. With its skirted design, cleaning is minimized and little chemicals will be released into the environment. The Carlyle II is the best one-piece toilet from the Toto brand.

Read More – Toto Carlyle II Toilet Review

The Toto Carlyle ii one-piece elongated 1.28 GPF flush toilet with CeFiONtect finish is a wonderful addition to any modern bathroom. It will immediately change the look of your bathroom and it comes with a wide range of colors to choose from. You can choose from colonial white, bone, cotton, to Sedona beige.  Also, this is a one-piece toilet, thus very easy to wash. The toilet features a skirted design, which means there is less cleaning the exterior parts of the toilets as the part between the tank and bowl is hidden.
Technical Specifications of the Toto Carlyle II Toilet

Features Toto Carlyle II
Pieces: 1-Piece
Water Consumption: 1.28 GPF
Color: Colonial White
Finish: Chrome
Certification: ADA, WaterSense, CALGreen, and CEC compliant
Material: Vitreous China
Flush Type: Water-Saving Toilets
Product Dimensions: 28.2 x 28.2 x 16.5 inches
Item Weight: 110 pound
Price: Toto Carlyle IICheck Price



  • Sturdy construction
  • EPA WaterSense certified
  • Comfortable elongated bowl
  • CEFIONTECT glaze keeps the toilet cleaner for a longer
  • Easy to clean with the skirted design
  • The Tornado flush clears everything in the bowl at once
  • It is ADA compliant


  • The toilet lid is of poor quality and not stable
  • Many users have complained that the SanaGloss finish doesn’t live up to its hype as marks can still be seen.

Investing in a high-quality toilet can save you money and stress associated with the maintenance of low-quality toilets! So, when you go out in search of a toilet to install in your new home or to replace the old one, ensure that you pick a high-quality toilet that will last for many years to come without having to worry about clogs or breakage.

One-piece toilets are the best for that matter as they are easy to maintain, sturdy, easy to clean, and very comfortable to use. The toilet models that we’ve discussed in this best one piece toilet post are worth the money and it all depends on your taste, needs, and budget.


Question: What is a one-piece toilet?
Answer: one-piece toilet comes with the tank and seat integrated into one unit, thus eliminating the crevice between the tank and bowl that can usually get dirty. Most upscale homes install one-piece toilets in their homes and these toilets usually have a low profile.

Question: What features should I consider when buying a toilet?
Answer: Before you purchase a toilet, there are various factors that you should consider and they include bowl type, toilet height, flushing system, water usage, and toilet rough-in. The best bowl design is elongated bowl as it offers more comfort, while the round bowl is great for small space. The most common rough-in is the 10-inch rough-in and it is the standard. Americans with Disabilities recommends people install toilets with a height of between 17 to 19 inches. The standard toilet height is 14-1/2-inches.

Question: How can I upgrade my toilet?
Answer: One of the easiest ways of upgrading your toilet is by choosing a SoftClose seat that doesn’t slam or make noise after visiting the toilet. The Second way of upgrading your toilet is by upgrading your trip lever finish. Most trip levers come in a chrome-plated finish. Instead, you can change it to another finish in order to match your towel bars or faucet.

Still, have a question after reading this best one piece toilet reviews? Comment below.

1 Comment

  1. This is the best article about One Piece Toilet.I read the full review and buying guides.But one toilet has missing .It’s eago tb351.If you add this toilet you will get more selas.If you want to know more about this eago tb351 review . Please read our review and buying guides.

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