Top 6 Best One-Piece Toilets in 2022: Reviewed

With the tiny house movement, living spaces are getting smaller and so are your bathrooms. You need something that is compact, functional, and also aesthetic. Best one-piece toilets to the rescue!

For starters, one-piece toilets have great aesthetics. They are a good match for a contemporary bathroom design in every modern home. In a one-piece toilet, the toilet tank and bowl are all connected as one whole unit. So you don’t have to worry about water leaking out of the tank and flooding the floor.

One-piece toilets are easy to clean and upkeep. They are more hygienic with no joining parts for dirt and bacteria to hide. Overall their compact size makes them a space-saving toilet for small bathrooms. But the market is filled with one-piece toilets from multiple brands. How do you know which one is right?

Worry not! Here I have gathered the best one-piece toilets. Take a look and decide which one will be the most compatible with your needs and budget.

If you are looking for space-saving toilets, you can check my review of the best.

List of the Best One-Piece Toilets in Market

1. TOTO UltraMax II

Toto UltraMax II One-Piece Toilet

The TOTO Ultramax II toilet is a smooth curved one-piece toilet. It is an ADA-compliant toilet and comes with an elongated bowl design with a lever-operated flush. The height of the seat is perfect. It qualifies for water sense certification since it uses less water i.e. 1.28 gallons per flush.

The Ultramax II toilet is ADA compliant and is built using Vitreous China. Toto’s SanaGloss coating helps Ultramax II avoid staining and keeping the microbes away. The lever of the single action flush is of a trip kind and is chrome plated. The materials used to make this toilet durable.

The Ultramax II toilet features Toto’s Double Cyclone flushing system which makes clearance of waste easy and in just one flush. The flushing system hence uses less water. This system works by pulling the flush water into the toilet and causing it to exit with an even greater force letting the waste out in one flush.

The Ultramax II toilet doesn’t require frequent manual cleaning because of the Double Cyclone flushing system and SanaGloss finish. This combination effectively keeps cleaning in check and that too in just one flush. Moreover, the SanaGloss finish helps in reducing the stains and keeping the microbes at bay. This keeps the toilet clean for long periods.

It is a low water consumption toilet. The Ultramax II toilet uses 1.28 gallons of water per flush. This attributes to making Ultramax water sense certified. The toilets that comply with the EPA Water sense specifications qualify for rebates on water bills. This is although location-based.

Unlike a two-piece toilet, Ultramax II being a single-piece toilet is a bit difficult to install. Although heavy its installation is quick, easy, and straightforward.


  • It comes with a soft close seat and lid
  • Single piece design
  • ADA compliant
  • Water sense certified
  • 1 year limited warranty


  • The contours on the bowl can cause an illusion near the water line that might look like a slight stain if the lighting is not proper.
  • The footprint of the toilet is slightly more than that of some older toilets in the same design category.

2. Kohler Santa Rosa

Kohler Santa Rosa
Kohler Santa Rosa One-Piece Toilet

The one-piece design of this Santa Rosa toilet offers a contemporary flair to your bathroom area while conserving space with a compact elongated bowl. Its 1.28-gallon high-efficiency flush saves up to 16,500 gallons of water per year when compared to an outdated 3.5-gallon toilet, without losing functionality. Its chair height and extended seat make it easy to operate.

The tank and bowl of this one-piece toilet are integrated into a smooth, easy-to-clean design. Furthermore, a Compact elongated bowl provides additional comfort while taking up the same area as a round-front bowl. Chair height seating is available at Kohler Santa Rosa, making it simpler for most people to sit and stand.

Its Single flush gravity creates a forceful siphon while flushing by utilizing gravity and a precisely constructed tank, bowl, and trapway. The AquaPiston canister allows water to enter the bowl from all sides (360 degrees), improving the flush’s force and efficacy. For leak-free performance, the Kohler Santa Rosa features a durable canister design with 90 percent less exposed seal material than a 3-inch flapper.


  • Easy to Clean
  • WaterSense Certified
  • ADA Compliant
  • Easy to Install


  • Expensive

3. American Standard Champion-4

American Standard Champion-4

The Champion-4 Right Height One-Piece Elongated Toilet is manufactured by American Standard and has the company’s Ever Clean Surface. This surface inhibits the stains and growth of bacteria, mold, and mildew, keeping the toilet cleaner for a longer time. The Ever Clean Surface is specifically designed to reduce staining and to hinder the growth of mold, bacteria, and mildew. Consequently, keeping the toilet cleaner for a longer time.

American Standard Champion 4 uses a flushing system having a 4” high-pressure piston to give a high-performance flush, i.e. delivers a high pressure 1.6 gallons flush. However, the 1.6 gallons per flush means that it is outside the Water Sense guidelines and does not qualify for the exemption. The combination of the levered flush mechanism, the height of the seat, and the shape of the bowl all make the American Standard Champion 4 ADA-compliant.

The American Standard Champion 4 is a one-piece toilet with a combined cistern. The 2 3/8” trap way of American Standard Champion 4 allows the waste to pass smoothly to the drainage system. Moreover, the flush system has been tested as capable of dispensing 2.2 lbs of waste in a single flush. The American Standard Champion 4 encompasses a high-pressure flushing system combined with the Ever Clean surface of the bowl, which ensures that the toilet flushes completely and properly in a single flush.

The toilet is designed to fit a minimum of a 12” rough-in. And as the American Standard Champion 4 is a one-piece toilet thus, it is heavier than the individual parts of a two-piece. This weight makes the Champion 4 a little more difficult to position it over the rough out. Therefore, rather than doing it on your own, it better be done as a two-person job.


  • Ever Clean surface to prevent the buildup of stains
  • high-powered flush
  • 2 3/8” fully glazed trap way
  • ADA compliant (when a suitable seat is fitted)
  • 10-year warranty


  • Does not meet EPA Water Sense requirements


Woodbridge T-0019

The next name on the best one-piece toilets is Woodbridge T-0019. The Woodbridge T-0019 is a dual-flush elongated one-piece toilet. It comes with a variety of features that belie its low cost, making it one of the greatest value for money toilets on the market today.

The T-0019 is designed to be both luxurious and space-saving. With a 1.28-gallon tank, it can fit into even the tiniest bathrooms. It also has a sophisticated appearance that would complement any bathroom design, whether conventional or contemporary.

Meanwhile, the toilet’s glazed siphon flushing keeps it from clogging or leaking. It also results in strong flushes while keeping the operation silent for the most part.

The T-0019 seat incorporates a stainless steel hinge for added durability. To summarise, this toilet area will not corrode and will maintain the lid intact even after frequent usage. And with its skirted trapway, the T-0019 is very easy to clean as well.


  • Very comfortable
  • The dual flushing mechanism provides more control
  • Siphon flushing system technology
  • Sleek and modern design


  • Flush button is of cheap material

5. Toto Neorest 700H

toto neorest 700h

A toilet as high-end as the Neorest undoubtedly deserves the best of TOTO’s toilet functions. Since this is a tankless toilet, thus all of the superpowers are contained in the bowl, including the electric pump that performs all of the heavy liftings when flushing.

However, the high-capacity electric pump is only half of the tale. Every detail, from the bowl surface to the water channels, is designed to enhance the cleaning power for full waste elimination. The CeFIONtect glaze on the glazed bowl surface is one of the most important components in waste disposal.

TOTO employs CeFiONtect, a non-porous glaze on its ceramic bowls. It prevents trash from sticking to the bowl’s surface, no matter how small. As a result, water can easily carry them away. Consequently, just 1.0 gallons of water are required to eliminate the solid waste.

The waterways, which are internal channels in the bowl, come next. Their function in the TOTO smart toilets is to direct water flow via apertures at the bowl’s top and bottom. The top opening is for washing the bowl. A powerful stream of water will spiral down from the rim, sweeping everything in its path all the way to the bowl outlet. On the other hand, the one at the bottom pushes everything through the trapway and into the drain pipe.

This Tornado Flushing System is also found in some of TOTO’s top high-end gravity flush toilets. It is a one-of-a-kind and industry-leading siphonic flushing mechanism. Moreover, the Tornado Flushing System’s rimless bowl shape in TOTO smart toilets is its best feature.

It lacks the traditional rim holes that run the length of the bowl rim. As a result, dirt and bacteria have nowhere to hide, resulting in a more sanitary toilet. It’s also a lot easier to clean with the CeFiONtect glazing because you don’t have to use any harsh chemical-based cleaners.


  • Water conservative
  • Quality  materials
  • Automatic flush
  • Easy to clean


  • Expensive

6. WoodBridge T-0001

WoodBridge T-0001

Without a doubt, the Woodbridge T-0001 is one of the best one-piece toilets. It’s a one-piece, elongated toilet with dual flushing, a comfortable seat height, and a soft-closing seat. It is simple to clean and maintain, as well as cheap while maintaining a sleek and sophisticated appearance.

This toilet has a comfortable height of 16.5 inches from the floor, which is higher than the industry standard of 15 inches. It’s especially well-suited to the needs of the elderly and those with mobility challenges.

Because it uses less water when flushing urine, this dual-flushing toilet can help you save money on your water bill. This toilet is not only water-saving, but it is also simple to maintain and clean. With this toilet, you can also expect fewer clogs. Moreover, it also has a strong siphon flushing motion that allows you to move waste with just one flush.

The fact that the toilet tank and bowl are all connected as one whole unit in this one-piece toilet helps the DIYers to install the Woodbridge T-0001 by themselves. In a nutshell, the Woodbridge T-0001 is a cost-effective one-piece toilet with a strong and dependable flushing system. It can also help you save money on your water bills.


  • Dual flush for water conservation
  • Budget toilet
  • Soft closing seat included


  • Tough to replace

Bottom Line

That was the full list of the best one-piece toilets. The best thing about the one-piece design is that the tank and the bowl are joined together, so, you won’t have to make provisions to support the toilet tank. It consequently makes the overall construction more compact and space-saving. This could be a reason why most compact toilets are of a one-piece design.

However, when it comes to installation, the one-piece toilets can be a bit baffling. You will feel challenged to install them due to their size and weight. Seeking professional help is a better idea than doing it yourself. Apart from that, it is all plus points

Besides the great looks, the one-piece toilet is easy to clean as well, keeping less room for bacteria to grow. And how is it possible? Because there is no gaps or joint between the toilet tank and the bowl. Consequently, there remains no space for dirt and grime to gather and grow.

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