10 Best One-Piece Toilets

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Toilets are part of our everyday lives. This piece of hardware is used to collect human waste and is usually seen in homes and public places. A toilet can be with or without water for flushing and varies in the material they are made of which can be anywhere from ceramic to plastic, concrete, or wood. Flush toilets can be connected to either a sewer system (more common in urban places) or a septic tank (in isolated areas). For dry toilets, these can lead directly to a composting chamber, pit, removable containers, or other similar storage.

Toilets can also be classified into one-piece and two-piece units. One-piece toilets are units wherein the toilet and tank are joined together without any joints. This kind of toilet comes pre-assembled and looks sleeker and cleaner since there are fewer spaces and gaps. However, this also gives the one-piece toilet a slightly larger look. Two-piece toilets, on the other hand, have a separate toilet and tank and utilizes fittings to connect the pieces. Two-piece toilets need to have the tank connected to the bowl during installation and may be harder to clean due to the presence of spaces in between the parts.

One-piece toilets have several advantages over their two-piece counterpart. Among these include a sleeker design, faster installation process, simpler to clean, and more compact in terms of height. One-piece toilets are also more durable and less likely to leak. Despite being heavier, one-piece toilets are also less prone to breaking and more expensive than two-piece units.

Best One-Piece Toilets

Woodbridge T-0019 Dual Flush Elongated One-Piece Toilet

WOODBRIDGE T-0019, Dual Flush Elongated One Piece Toilet with Soft Closing Seat, Comfort Height, Water Sense, High-Efficiency, Rectangle Button, Cotton White
Woodbridge T-0019 (Image: Amazon)

Woodbridge T-0019 One-Piece Toilet features a modern and sleek design that suits any contemporary bathroom.

With a skirted trapway, there are no grooves and corners that dirt can accumulate in making it very easy to clean the one-piece toilet. The one-piece toilet also features a dual flush and fully glazed flush system. The quiet but powerful flush uses only 1.0 or 1.6 GPF and meets WaterSense certification to ensure adherence to EPA flushing guidelines.

The one-piece toilet also comes with a soft-closing seat complete with a stainless-steel seat hinge to facilitate easy removal and cleaning. The bowl is also set to chair-height seating to make it comfortable to sit down on and stand up from. The package comes complete with the toilet unit, toilet seat, wax ring, floor bolts, special hand wrench tool, and installation instructions.

Customers who’ve tried the Woodbridge T-0019 found the toilet seat to be of good quality. It is easy to clean and comfortable to use. Users have also commented that it is water-efficient and can flush out solid wastes even with just the weaker flush. The instructions were also easy to follow; however, it can be difficult to maneuver the unit because it is quite heavy.

Some users found it hard to align the bolts and recommend either getting someone to install it for you or have someone to help you. The toilet may also be hard to install in tight spaces. There was also some feedback from customers that the Woodbridge T-0019 didn’t have a quiet flush as advertised and customer service was hard to get hold of.

American Standard Champion 4 Right Height One-Piece Elongated Toilet

American Standard 2034.014.020 Champion-4 Right Height One-Piece Elongated Toilet, White
American Standard Champion 4 (Image: Amazon)

The American Standard Champion 4 One-Piece Toilet features an elongated bowl with a 16 1/2” rim height for comfort. The one-piece toilet is suitable for people with mobility problems or disabilities and meets ADA requirements. Stylish and contemporary, the bowl uses siphoning action to remove waste and uses up only 1.6 gallons per flush. The unit itself is made from vitreous china, an enamel-coated ceramic that ensures durability and glossiness.

The bowl is also coated with EverClean, a permanent glaze that helps keep the toilet cleaner for a longer period of time by inhibiting the growth of bacteria, mildew, fungus, and algae that cause stains or deterioration of the bowl’s surface. Each unit comes with a 100% factory flush-tested guarantee and is backed by American Standard’s 10-year warranty. The unit comes with the toilet and bolt caps and doesn’t include the toilet seat.

Based on customer reviews, the Champion 4 one-piece toilet does not take up a lot of space in the bathroom and is very quiet when flushed. It also doesn’t take long to fill up the tank in between flushes. The wider trap combined with the reduced water usage per flush is also among the things that customers are happy about.

Despite the stellar performance of the Champion 4, users have found some issues when it comes to the fit and finish of the toilet. Some customers said that the base of the toilet was not level and had to be shimmed or had to be filled in with silicone. While the flush of the toilet is strong, there is some feedback that the glaze doesn’t prevent solid waste from sticking on the bowl.

TOTO Neorest 700H Dual Flush One-Piece Toilet – Luxury Pick

Toto MS992CUMFG#01 Neorest 1.0 GPF and 0.8 GPF 700H Dual Flush Toilet, Cotton White
TOTO 700H Neorest (Image: Amazon)

The TOTO 700H Neorest is an integrated one-piece toilet designed for ultimate comfort when going to the bathroom. Ecology and luxury meet in one single unit thanks to the technologically-advanced features of the TOTO Neorest which also meets universal and ADA standards. Among the innovations one can expect to see from Neorest 700H include EWATER+, a process that ensures the bowl stays clean after every flush, CEFIONTECT, a ceramic glaze on the toilet bowls surface that makes the bowl smoother and easier to clean, and TORNADO FLUSH System, a high-efficient flush system that uses 1.28 GPF with the help of 2 nozzles that create a cyclone-like action for cleaning the bowl.

Apart from these technological features, the one-piece toilet also features a dual flush, automatic flushing, automatic lid opening and closing, heated seat, air deodorizer, EWATER+ for cleaning the bowl and wand, an LED night light, and remote-controlled operation.

The Neorest 700H will no doubt set you back a couple of thousand bucks but based on customer reviews, it is worth every cent they’ve paid. Customers have raved about how comfortable the toilet is, from the option to choose the water pressure and the temperature to the automatic lid and heated seat. Users are also happy with the efficiency of the flush system, saying that one flush is enough to remove waste from the bowl even with low water volume.

Some customers have had issues with the automatic lid opening and closing feature of the Neorest 700H. Some users have also reported that their toilet cracked which eventually got bigger and some parts fell out. When it comes to their customer service, customers with issues aren’t too happy with the lack of response from TOTO.

TOTO Eco Ultramax Elongated One-Piece Toilet

TOTO MS854114E#01 Eco Ultramax Elongated One Piece Toilet, Cotton White
TOTO Eco Ultramax (Image: Amazon)

The TOTO Eco Ultramax One-Piece Toilet has a sleek, high-profile design with an elongated bowl and SoftClose seat. The computer-designed trapway measures 2 1/8 inches, wider than the industry standard to facilitate passage of waste and is fully glazed too. The Eco Ultramax toilet can also be upgraded to a WASHLET for more comfort.

TOTO’s one-piece toilet features E-Max technology, a flush system that saves water with the help of a 3-inch flush valve and extra-large siphon jet. The flushing action is not only efficient but also minimizes noise when flushing. The Eco Ultramax uses 1.28 GPF, equivalent to 20% more water savings compared to a 1.6-gallon toilet and 63% more water savings in terms of a 3.5-gallon toilet. It is also compliant with EPA’s WaterSense partnership program.

Customers have found the Eco Ultramax toilet to be of good quality. It is suitable for those who find ADA-height toilets too high. Users also appreciate the shape of the bowl which they said helps prevent any backsplash under the seat when peeing. The flush is also efficient in removing waste and cleaning the bowl.

While there aren’t many issues when it comes to the performance of the Eco Ultramax toilet, several customers have had issues with the unit they’ve received. Several users have reported receiving units with broken parts and the replacement they received was broken as well. There was also feedback that the toilet sits too low, in which case, an ADA-height toilet might be better suited.

Swiss Madison Well Made Forever St. Tropez One-Piece Toilet

Swiss Madison Well Made Forever SM-1T254 St. Tropez One Piece Toilet, 26.6 x 15 x 31 inches, Glossy White
Swiss Madison St. Tropez (Image: Amazon)

With a modern and clean design, Swiss Madison’s St. Tropez Elongated One-Piece Toilet is suitable for contemporary and conventional bathrooms alike. It has a fully skirted trapway for ease of cleaning, a soft-closing seat, wax ring and bolt kit, and bolt covers. The soft-closing seat can be removed easily with just a push of a button for convenience.

The slim tank is suitable for narrow spaces, with a strong flush function to facilitate the removal of waste. The dual flush uses 0.8 or 1.28 GPF and is factory tested. The seamless one-piece porcelain toilet also has comfort height for ease in sitting down and standing up.

Customers who purchased the St. Tropez one-piece toilet were happy with the compact design of the unit. Everything needed to install the toilet comes in the package and it is easy to clean too. Users are also happy with the modern design of the St. Tropez and the majority agree that it looks beautiful in any bathroom.

There are some concerns with installation, particularly with the access slots on the sides of the skirting deemed too small for most hands to fit in. Some customers also received faulty units, with some cracks and chips on the actual toilet when the package arrived. However, they have also shared that Swiss Madison’s customer service should be able to send out a replacement once you’ve gotten in touch to report the problem.

Kohler Santa Rosa Comfort Height Elongated One-Piece Toilet – Budget Pick

Kohler 3810-0 Santa Rosa Comfort Height Elongated 1.28 Gpf Toilet with Aquapiston Flush Technology And Left-Hand Trip Lever, White
Kohler Santa Rosa (Image: Amazon)

Kohler’s Santa Rosa One-Piece Toilet is compact and elongated with a contemporary look. Designed to conserve space in your bathroom, the toilet also aims to make your bathroom experience more comfortable with a chair-height design that meets ADA’s requirements. The Santa Rosa toilet includes the Brevia Quiet-Close seat to prevent slamming.

The unit’s single flush uses 1.28 GPF and utilizes the power of gravity and a precision-engineered tank and bowl to create a strong siphoning flush action. The Santa Rosa toilet also features AquaPiston canister technology, allowing water to flow into the bowl on all sides to increase efficiency and power when flushed.

Users have commented that considering the price of the Santa Rosa one-piece toilet, it gives good value when it comes to performance. Each flush uses only a little water but customers have had no trouble with inefficient flushing and found one flush enough to clean waste. The tank refills quickly after flushing and doesn’t clog. The toilet was also securely packaged when received and customers found it easy to install.

Customers, however, were disappointed with the quality of the plastic seat that came with the toilet. Some users have also had issues with the toilet tank refilling continuously while others had faulty flush functions.

Kohler Veil Comfort Height Elongated One-Piece Intelligent Toilet

Kohler K-5401-PA-0 Veil Comfort Height Skirted One-Piece Elongated Dual-Flush Intelligent toilet, White
Kohler Veil Comfort (Image: Amazon)

Kohler’s Veil Comfort Height One-Piece Toilet is a combination of minimalistic style with efficient and comfortable hygiene. Suitable for those with mobility problems, Veil toilet has a 17-inch seating height and meets ADA code requirements. It also utilizes dual flush technology for a choice between 0.8 and 1.28 GPF and a pump-assisted system for a strong and efficient flush every time.

Among the features of the Veil intelligent toilet include customizable water pressure, temperature, and spray modes, self-cleaning wand with the help of UV light and electrolyzed water, warm air dryer, heated seat, automatic deodorization system, motion-activated handsfree opening and closing of the lid, Quiet-Close lid, LED night light, touchscreen remote control, and emergency flush backup of up to 100 flushes. The package includes the one-piece toilet and seat, braided inlet supply hose, supply stop valve, LCD remote control, and power cord.

Customers find the features of the Veil Comfort Height Toilet useful and amazing. Users say that it is comfortable to sit on and to use, and the option to customize the settings for different users is also helpful. The one-piece toilet makes going to the bathroom a comfortable experience and is a level-up from the standard hygiene measures.

Probably the biggest drawback when it comes to the Veil toilet is the price tag but the majority of customers agree that you truly get what you pay for.

TOTO WASHLET+ UltraMax II One-Piece Elongated Toilet – Best Value

TOTO MW6042044CEFG#01 WASHLET+ UltraMax II One-Piece Elongated 1.28 GPF Toilet and WASHLET C200 Bidet Seat, Cotton White
TOTO Ultramax II Washlet (Image: Amazon)

TOTO’s Ultramax II WASHLET+ C200 Elongated One-Piece Toilet offers seamless integration of technology into one’s personal hygiene experience. Get clean and comfortable with Ultramax II’s features including Tornado Flush technology, TOTO’s flushing system that uses only 1.28 GPF and makes use of two nozzles to create a centrifugal cleansing action for more efficient waste removal, CEFIONTECT ceramic glaze to protect the surface of the bowl from stains and discoloration, and WASHLET+ bidet seat for cleansing.

The toilet unit pre-mists the bowl before use to minimize waste that sticks on the surface. You can choose between front or rear wash modes, both with customizable water pressure and temperature. The bidet toilet also comes with a heated seat, warm air dryer, and automatic air deodorizer.

Customers found the Ultramax II WASHLET+ C200 toilet very easy to use. The controls are easy to figure out and the ability to customize settings is one of the features most appreciated by users. The deodorizer is also effective and doesn’t have any harsh smells.

One of the things that users wished was automatic was the cleaning of the wand after each use. Some customers also found the flush too weak if you throw toilet paper in the unit and the dryer takes a while to be able to do a decent job.

American Standard Compact Cadet 3 FloWise Right Height Elongated One-Piece Toilet

American Standard 2403128.021 Compact Cadet 3-FloWise Tall Height 1-Piece 1.28 GPF Single Flush Elongated Toilet with Seat, Bone
American Standard Compact Cadet 3 FloWise (Image: Amazon)

The Compact Cadet 3 FloWise Toilet from American Standard is a combination of style, comfort, and power in one seamless unit. The compact and elongated design gives more room to sit on comfortably and includes a slow-close seat to avoid loud slamming. The Right Height bowl is also designed to make sitting on and standing from the toilet easier and meets the ADA code.

Apart from these, the toilet is also glazed with EverClean, a system that helps the bowl maintain its cleanliness for a longer period by minimizing sticking of waste and preventing the growth of mold, bacteria, and other organisms that can cause discoloration and stains. The Cadet 3 FloWise toilet also WaterSense certified and utilizes FloWise technology using 1.28 GPF and ensuring water conservation is observed to the highest level possible. The toilet seat comes with a sanitary lift tab to allow users to move it without coming in contact with the bowl.

According to customer reviews, the Cadet 3 FloWise toilet is very compact and saves a lot of space in the bathroom. It is also easy to install and some users have shared that they were able to install it in 15 minutes.

Some users, however, found the noise of the flush very loud and commented that it takes a while to refill the tank after flushing. Some customers also have flush issues after a couple of years. Others also found the slow-close seat a bit flimsy.

Woodbridge T-0001 Dual Flush Elongated One-Piece Toilet

WoodBridge T-0001, Dual Flush Elongated One Piece Toilet with Soft Closing Seat, Comfort Height, Water Sense, High-Efficiency, Rectangle Button
Woodbridge T-0001 (Image: Amazon)

The T-0001 One-Piece Toilet from Woodbridge features a contemporary style coupled with functionality. The sleek unit has a skirted trapway with no grooves and corners that dirt can get into, making it easy to clean. It also comes with a high-quality soft-closing seat with a stainless-steel seat hinge for durability and stability. The seat easily comes off from the toilet for better access when it needs to be washed.

The WaterSense-certified toilet uses 1.0 and 1.6 GPF using a siphon flush system to prevent clogging. The Woodbridge T-0001 comes as a complete package that includes the toilet, pre-installed toilet seat, floor bolts, wax ring, special wrench, and instructions manual.

Visually, customers found the T-0001 toilet stylish and modern-looking. The dual flush is efficient and the majority of customers found the flush to be quiet. The model is also compact enough to fit into tight spaces and easy to clean. Customers were also happy with their customer service which sends out replacements fast in case of faulty parts.

According to customer reviews, installing the T-0001 toilet can be quite difficult because you cannot see the holes where you are supposed to put in the bolts. There are also some customers who had issues with the toilet leaking. Some users also found that the stainless-steel hinge rusted after a couple of years.

Buyers Guide

White one-piece toilet
White one-piece toilet (Image: mrsiraphol)


To ensure quality, toilet-makers get their products certified from different organizations to ensure they meet industry standards. Among these include ADA for toilet seat height requirements and EPA for water efficiency.


A lot of one-piece toilets have WaterSense certification from EPA as part of a partnership program to ensure water conservation. Water-saving toilets use about 0.6 to 1.6 GPF.

Comfort Height vs Standard Height

Standard height toilets have a height of 15” while comfort height units can be anywhere from 17 to 19 inches high. Shorter individuals might find comfort height toilets uncomfortable but people with mobility problems and disabilities should find toilet models with this feature more suitable.

Round Toilet vs Elongated Toilet

Elongated toilets are generally 2 inches longer compared to round models, making it the model of choice for those on the larger side since there’s more room to sit on. Round toilets are less expensive than elongated models and are suitable for children.

Toilet Seat

One-piece toilets can come with or without a toilet seat. If you prefer one that comes without, make sure it will fit into standard ones available in the market to avoid any hassle. Some units also come with a bidet installed, which is great if you need a more efficient way of cleaning yourself.


One-piece toilets are visually appealing since they do not have any grooves and corners and create a seamless look. They are also easy to clean inside and outside. These are heavier than two-piece toilets and harder to move around since you cannot take apart the pieces which can make installation in small spaces a challenge. However, generally speaking, these are easier to install than two-piece units because all the components are already attached. One-piece toilets are considered more durable than two-piece units and less likely to leak. These are also more compact in terms of design, making one-piece toilets suitable for bathrooms with limited space.

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