7 Best One-Piece Toilets to Buy in 2024 (Detailed Reviews)

Have you ever considered the amount of time we spend in bathrooms? It is the best place to be alone, read a magazine, or win six more levels in Candy Crush. That is why I think that the most comfortable thing there must be a toilet. It should have not only ideal seating but also pleasant-to-touch material, a clogless flushing system, and time-saving cleaning options.

All the above-mentioned characteristics suit one-piece comfort height toilets. So here I collect 7 best single-piece toilets from American and foreign companies.

For each product, you will find short brand information, description, advantages, and disadvantages. Also, I collected all the useful tips on how to make the best choice of toilet. Take your time and choose correctly.

Top 7 Single-Piece Toilets

  1. TOTO UltraMax II — Top Pick
  2. Kohler Santa Rosa — Runner Up
  3. American Standard Champion-4 — Great Value
  4. WOODBRIDGE T-0019 — A Dual Flush One-Piece Toilet
  5. Kohler 3810-NY Santa Rosa
  6. Toto Neorest 700H — A Modern One-Piece Toilet
  7. Woodbridge T-0001 — An Affordable One-Piece Elongated Toilet

I have chosen the best single-piece toilets with effective flushing systems. This rate presents products from different price ranges and focuses on the items` material and water-saving options.

1. TOTO UltraMax II — The Best One-Piece Toilet

  • Dimensions: 28 x 16 x 28 inches
  • Flush type: ‎Gravity Flush Toilets
  • Water consumption: 1.28 Gallons per Flush
  • Bowl shape: Elongated
  • Material: Vitreous China

The UltraMax II has all the newest updates of the Toto. Toto is a company worldwide known for its bathroom equipment. It was founded in 1917 by Kazuchika Okura in Japan.

Toto’s products are based on Japanese pottery and porcelain heritage, that’s why the products are so durable and pleasant to look at. Their main goal is to create environment-friendly, well-designed tools to make daily routines comfortable.

The UltraMax II is an elongated easy-to-install toilet. It is made of vitreous china and covered with Toto’s patented SanaGloss glaze. So, the material is smooth, and protected from bacteria and scratches. The cleaning process takes minimal chemicals and water.

Another innovation is a Tornado Flush system. One flush uses 1.28 gallons of water and spins it into a powerful centrifugal stream that effectively cleans the bowl. This updated system helps to avoid clogs.

If you are looking for a comfortable seat, the UltraMax may be the right decision. It has suitable for all body-types seats, designed with a hinge mechanism that closes softly and quietly.

10Expert Score

The manufacturer offers 6 different colors for this item. The flusher in the form of a wave sets on the left upper side.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • easy to install;
  • it doesn’t use extra water;
  • the toilet doesn’t clog;
  • it follows the standards of EPA WaterSense, California’s CEC, and CALGreen.
  • a bit noisy when refills.

2. Kohler Santa Rosa — A Proper One-Piece Elongated Toilet

  • Dimensions: 31 x 20.75 x 29 inches
  • Flush type: ‎Gravity Flush Toilets
  • Water consumption: 1.28 Gallons per Flush
  • Bowl shape: Elongated
  • Material: China
  • Certification: WaterSense
  • Warranty: ‎One-year limited warranty

Kohler is one of the oldest companies in the USA. It started to produce bathroom items in 1883; thus, it is a time-tested company with high-quality products.

The Kohler 3810-0 Santa Rosa is an elongated toilet with a comfortable height. Its dimensions are 31 x 20.75 x 29 inches. In some old houses, the tube section may be unmovable, so make proper measurements before ordering; otherwise, you’ll be surprised at the installation phase.

Due to the one-piece design, it is elementary to install Santa Rosa, but it is always better to address the professionals. The Kohler 3810-0 is made from white china. Thanks to the material and color, it suits any bathroom design.

9.9Expert Score

Flushing technology is a new generation type called AquaPiston. The 1.28 gallons of water flow 360 degrees (from all sides of the bowl); such engineering increases the effectiveness. Also, flushing doesn't make extra noise.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • simple installation process;
  • aquaPiston flushing technology;
  • uses 1.28 gallons of water;
  • universal white color suits any design;
  • has WaterSense Certification.
  • the lid doesn’t close softly.

3. American Standard Champion-4 — A Popular Elongated One-Piece Toilet

  • Dimensions: 17.75 x 29.75 x 29.5 inches
  • Toilet style: ‎Elongated
  • Water consumption: 1.6 Gallons per Flush
  • Bowl shape: Elongated
  • Material: Vitreous China
  • Certification: Watersense, Certified frustration-free
  • Warranty: Limited 10-Year Warranty

American Standard company is a leader in manufacturing plumbing and building products, especially in North America. The statistics say that three out of five homes in the USA have American Standard goods. I will not deny it as the company produces stylish sinks, faucets, and a lot of other products for bathrooms and kitchens.

The Champion model line includes single-piece and two-piece toilets. The single-piece type has an elongated seat.

The Champion-4 is made of porcelain, so it’s a reliable and durable model. The proportions are 29.75 x 17.75 x 29.5 inches, but the weight is 119 pounds. Carrying the Champion-4 by oneself might be challenging, so I advise you to call for professional help.

The inside and outside covers are made from an EverClean. It is a mirror-like antimicrobial surface that prevents stains, mildew, and odor.

9.7Expert Score

The flushing system consumes 1.6 gallons per flush. Meanwhile, it is strong enough to wash down a bucket of golf balls, as an independent test has shown. So the system is 70 % better than the common standard.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • it stays clean for a long time;
  • has almost soundless refill;
  • easy to clean;
  • environmentally friendly.
  • it is heavy;
  • the delivery kit doesn’t include a seat;
  • the chain in the tank has a lot of small parts that are easy to lose.

4. WOODBRIDGE T-0019 — A Dual Flush One-Piece Toilet

  • Dimensions: 31 x 19 x 28 inches
  • Bowl shape: Elongated
  • Material: Porcelain
  • Certification: ‎Watersense
  • Warranty: 1 Year limited to be free of defects in material and workmanship

Woodbridge was established in Cerritos, California, in 2005. It is a bathroom and kitchen manufacturing company. The main trait in sanitary engineering design is evenness.

The T-0019 model has neither grooves nor corners. It is compact and easy to clean.

This white porcelain device has an elongated bowl. The parameters are 31 x 18 x 28 inches. It is one of the heavyweights at my rate – 152 pounds. I strongly recommend installing it not alone, but with 2 more helpers.

T-0019 is a dual-flush toilet. It means that there are two options, whether you use 1 or 1.6 gallons per flush. It helps to save up to 6500 gallons of water per year.

The flushed water doesn’t cover the entire bowl. There are several untouched spots on the back. Nevertheless, it is easy to clean with a toilet brush.

9.6Expert Score

It has a rectangle button on the top of the tank. The button is silver-colored and divided into two parts responsible for a different amount of water. On the one hand, you don’t need to worry that the button will drop off. On the other hand, users complain about cheap material, and the silver cover is worn away fast.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • water-saving flush system;
  • modern design;
  • easy to clean.
  • the flushing water misses a few spots;
  • the button is made of cheap material.

5. Kohler 3810-NY Santa Rosa — A Stylish Low Boy Toilet

  • Dimensions: 31 x 20.75 x 29 inches
  • Flush type: ‎Gravity Flush Toilets
  • Water consumption: 1.28 Gallons per Flush
  • Bowl shape: Elongated
  • Material: China
  • Certification: WaterSense
  • Warranty: One-year limited warranty

It is one more Kohler product of the line Santa Rosa. It has a simple but trendy design. The main difference from the abovementioned model is color. 3810-NY features a softer, warmer shade. It reminds me of a tender mixture of sandy and creamy colors. It is called a dune. I suppose it will suit the bathroom full of gentle yellow light or if the windows are on the sunny side.

This toilet is also made of china. Its dimensions are 27-3/4 inches by 18-3/4 inches by 28-3/16 inches.
One more prominent feature of Santa Rosa is its bowl and tank design. It is space-saving, so it suits even the smallest bathroom. Thanks to its smooth form, it is easy to clean. It also saves time on cleaning.

The item works with the AquaPiston flushing system, which streams water from all bowl’s upper sides.

9.4Expert Score

The handle is placed on the left upper side. It reminds of a silver arrow, and thanks to the form, it is easy to push evenly.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • dune color;
  • powerful flushing system;
  • compact design.
  • sometimes the delivery system fails in packing and safe transportation.

6. Toto Neorest 700H — A Modern One Piece Toilet

  • Dimensions: 17.75 x 31.85 x 20.75 inches
  • Toilet style: ‎Contemporary
  • Flush type: ‎Siphon Jet
  • Water consumption: ‎1 Gallon per Flush
  • Bowl shape: Elongated
  • Material: Ceramic with SanaGloss
  • Certification: WaterSense
  • Warranty: Three-year limited (residential). One-year limited (commercial)

Among all the top-rated one-piece toilets, this is the best premium-class model. Toto company always keeps an eye on the latest innovations and implements them in its products. The 700H is a selection of the latest updates that were developed to simplify our life.

It starts to work while you are approaching the toilet. A SoftClose seat in the elongated bowl opens and closes automatically, and, if you are a nightwalker, it illuminates the way in the dark with gentle blue light.

The toilet has a stylish remote control that could be placed near it on the wall. It provides settings for such features and functions:

  • Flush options;
  • Water stream settings;
  • Cleaning features;
  • Bidet;
  • Temperature settings;
  • Temperature control of the seat;
  • Air deodorizer;
  • Air dryer.

The Neorest 700H proportions are 32.5 x 15.5 x 21.5 inches. It is made of cotton-white ceramics with SanaGloss (protection from small damages). The tornado flush system prevents clogs and even electrolysis of the water; in this way, it cleans the surface without chemicals.

9.1Expert Score

It is the best water saver with a dual flush system. The 700H uses 1.0 and 0.8 gallons per day, which saves almost 11.5 gallons of water per day.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • high-tech toilet and bidet;
  • high-quality materials;
  • minimal water use;
  • remote control of spa-like options;
  • designed for durable usage;
  • the seat lid opens and closes automatically;
  • automatic Flush.
  • expensive.

7. Woodbridge T-0001 — An Affordable One-Piece Elongated Toilet

  • Dimensions: 30 x 16.5 x 28 inches
  • Bowl shape: Elongated, Comfortable Height, Easy to clean shape
  • Material: Ceramic
  • Warranty: 5-year limited warranty on porcelain parts against fading/staining of the glaze; 1 Year on flushing mechanism & soft closing toilet seat

This white ceramic product of Woodbridge also comes from California.

In contrast with the T-0019, the T-0001 is small (28.5 x 14.5 x 27.5 inches) and light (119 pounds). It is designed to fit into small bathrooms. The elongated bowl is smoothly connected to the tank, so the construction has no unreachable angles.

The T-0001 has a dual flush system for 1.0 and 1.6 gallons per flush. This system is engineered to prevent clogs and leaks due to the power and accuracy of the water streams. It is super quiet, so the noise won’t bother you at all. The 2 flushing buttons are placed on the top, as in the T-0019 model.

8.7Expert Score

The delivery kit includes a pre-installed seat with a soft closing mechanism on a stainless steel hinge. It makes the seat silent during the closing, durable, and easy to remove for cleaning.

Material and Design
Flushing technology
Value for Money
Pros: Cons:
  • affordable;
  • noiseless item;
  • the dual flush system saves water expenditures;
  • a soft closing seat included.
  • it is hard to order a new part from the manufacturer.

Buyer’s Guide and FAQ

The one-piece toilet is a sanitation facility that is made as a solid unit. It means that the water tank, bowl, and base leg are united and made of the same material. The single-piece toilets are aesthetically attractive, but it is not the only pros of such type.

Kohler 3810-0 Santa Rosa

The advantages are:

  • Space-saving. The majority of the models have compact parameters and may be installed even in tiny bathrooms.
  • Water-saving. The average amount of water in the tank is 1.6 gallons. But more modes come with even fewer water-use options. It helps to reduce wasted resources.
  • Easy to clean. The solid construction has no unreachable corners or joints and no hiding place for dirt. You don’t need to look for special narrow cleaning devices, the common cleaning cloth with soap water is enough for proper cleaning. Meanwhile, if you wipe the toilet with the microfiber cloth regularly, it will need a wet-cleaning once a season.
  • Easy to install. The construction is already completed. You just need to connect it to your house’s plumbing system.
  • Leakless. Due to the solid construction, there are no unnecessary junctures and holes.
  • Scratchless. Almost all modern models have an extra covering layer that prevents small damage and spots that may cause scratches.
  • Durable. Thanks to the design, material, and proportions, single-piece toilets tend to work longer than other types.

All these pros are included in the products of such brands:

  • Toto;
  • Kohler;
  • American Standard;
  • Woodbridge;
  • Saniflo.

You are already acquainted with the products of the top 4 best companies on the list. I can assure you that the quality of American products is as high as in Japanese. The main difference is in the design and additional supplies such as anti-spot cover, intensified flushing system, and included technologies.

Toto items make you feel like a sci-fi reality; meanwhile, they are bringing the future to the present and changing your attitude to comfort.


Despite the strong recommendations to call special services for installation, 40% of buyers try to tame the water and technologies by themselves. Therefore, here I provide a step by step home installation plan. Use it when you are sure that you can deal with plumbing without professionals.

  1. Turn off the water supply. In most cases, there are two valves (red and blue). I advise closing both, especially if you haven’t installed them, to be 100% sure.
  2. Remove the old toilet. If you want to make the removal spectacular and memorable, use a sledgehammer. The process may be messy, but you’ll definitely feel relief.
  3. Pull off the old wax ring. It prevents leaking, so, even if the previous version looks like never-used, get rid of it. The ring may have microscopic scratches, shape deformations, or mildew.
  4. Clean the floor and the base area. As far as you will put the new toilet for several years, this is your only chance to check the base, pay extra attention, and clean up all the water spills.
  5. Find the closet bolts and slots for them in the toilet leg. Check out the position and screw the bolts into the flange channel. If there are no slots in the toilet base – make them with a driller.
  6. Pull up the new wax ring onto the bottom of the leg. Ensure that it is placed tightly to the walls.
  7. Place the toilet gently on the prepared area. Fix the construction with the closet bolts, and firmly close the bowl caps.
  8. Connect the water supply line to the tank by hand. The length of the line depends on the toilet model.
  9. Install the toilet seat and flush handle if it is not set up. Check the seat instruction, because installation varies according to the model.
  10. Turn on the water supply and check the line for leaks.
  11. Wait till the tank fills up. Control the water level according to the model’s characteristics.
  12. Open the tank’s lid and flush the water. Inspect whether all parts of the flushing system are working and whether there are no leaks.

If this list seems complicated, don’t risk it and call a professional.

How to Choose the Right One-Piece Toilet for Your Bathroom?

To choose the appropriate one-piece toilet, you should follow several steps:

  1. Find out a rough-in dimension. It is the distance between a wall and the flange bolts. The most common is 12 inches, but it may vary from 10 to 14 inches. Thus don’t forget to measure it.
  2. Choose a bowl height. The bowl height is a distance from the bowl’s top without a seat to the floor. There are several types of height; for example, 15 inches stand for the Standard, 17 inches define Comfort, 16-18 inches – for the ADA, and 10-14 inches for Child & Juvenile height. The higher the bowl – the easier it is to get on and off. That is why added height is so popular among the elderly.
  3. Decide what bowl shape you want. There are 3 types of bowls shape-round, elongated, and a special option for the order. Make a decision relying on your bathroom size and design.
  4. Explore the flushing types. You may find the gravity-fed type that flushes under the weight of the water in the tank; the pressure-assist – presses the water with compressed air; the vacuum-assist – creates a low-leveled vacuum that triggers the flushing process.
  5. Select the color. The majority of companies offer a big pallet of colors and shades. I advise you to decide on the color temperature suitable for your bathroom design. It will help you to limit the variants at least to 3.
  6. Pay attention to a handle place. It might seem like a silly point, but you will remember me when your handle will scratch the wall, or it will be on the right side while you are left-handed. There are 5 variants of handle placement: left side, left front, top push button, right front, and right side. So, imagine using it before choosing the option.

Related Post: Best Wall-Mounted Toilets Reviewed

Which Is Better One-Piece Toilet or a Two-Piece Toilet?

It depends on your budget and the needed dimensions. The two-piece toilet is more popular because it is cheaper. As far as the tank and the bowl are separated, it is lighter to carry and less bulky. It has a taller water tank.


On the contrary, the joining area is a paradise for bacteria, grime, and dirt. It takes a lot of time to clean that area. Also, you should pay attention to the tightness of the junction to control possible leaking.

I like a one-piece toilet more because it has a seamless design. Nevertheless, it doesn’t mean that a two-piece toilet isn’t good.

Which Is Better Round or Elongated Piece Toilet?

The round-front bowl is smaller, thus, ideal for a compact bathroom. The elongated bowl is approximately 2 inches more. I favor the elongated bowl because it is more comfortable for adults and suits any body type.

Nevertheless, there may be problems if you have a small bathroom. Measure it twice before ordering the elongated bowl toilet, because an excessively long construction will block your door.

Choose the Best

In conclusion, I want to say that the properly chosen one-piece toilet may become your favorite seat in the home. Pay attention to the seat height, material, and design, and you’ll enjoy the purchase for a long time. Don’t spare money on daily routine products, because they define your quality of life. And I’m sure you deserve only high-quality devices.

I hope you have examined my one-piece toilet reviews and found something useful for you. Have you ever tried any brands from the list above? What is your favorite item? Do you prefer a single-piece or two-piece toilet?

Gerald Carpenter

My name is Gerald Carpenter and I am a professional plumber in the third generation. My father was a plumber, my grandfather was a plumber. I wish I had records on my other ancestors.

1 Comment
  1. I see you’ve mentioned Toto Ultramax II. It is the best flushing one-piece toilet for sure. My dad recommended this one to me, and he is a plumber, so I trust him about it. You mentioned the noise it creates while refilling, and I can assure you, you will not hear it behind the closed door. This model also is savvy, as I don’t need to flush twice.

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