One-piece toilets are becoming more and more popular as they offer a sleek design that’s both functional and aesthetically pleasing. One-piece toilets are much easier to clean and have a lower risk of leaking than two-piece toilets.
One-piece toilets has the same features as their two-piece counterparts and do not always cost more. So, why are they becoming more popular? And what are some advantages?
Below we share some considerations when looking for a new one-piece toilet, and our top ranked picks!
Comparison of the Top Toilets with a One-Piece Design
10 Best One-Piece Toilets Ranked & Reviewed
Our toilet experts reviewed and listed facts for the top one-piece toilets in 2023.
“The American Standard Champion 4 is a top pick because of its super-strength flushing power and seamless one-piece design.”
We’re starting off this list strong, with our all-time favorite – the Champion 4. This toilet is a solid choice that prioritizes water efficiency and suction strength.
This toilet uses 1.6 gallons per flush and is a leader in clog-free performance. The toilet’s quiet flush can move up to 70% larger masses than most toilets due to of the Champion 4 flush system.
The 4″ piston accelerator flush valve helps remove most waste loads in just one flush. An extra-large trapway also eliminates waste quickly, without a double flush. The toilet’s MaP score is 1,000 grams – it doesn’t get better than that!
It features a comfort height of 16.5 inches, ensuring maximum comfort. It’s ADA-compliant, with a comfortable elongated siphon action jetted bowl.
The Champion 4 comes with an EverClean surface, which prevents bacteria, mold, and mildew buildup. Like most toilets in this price range, it features a slow-close seat.
The American Standard Champion 4 comes in white, bone, or linen, along with a chrome trip lever. The lever can be swapped for a white, polished brass, or satin. It comes with a ten-year warranty too.
Read more about the American Standard Champion 4 with our full review article.
- Champion Slow Close Elongated #5325.010
Other Champion 4 Models
Our Final Take
This one-piece toilet is a favorite among reviewers. Several mention it’s powerful flush, with many stating they’ve yet to have a clog. Reviewers love the look of this toilet, sharing that it complements most bathroom designs. Some buyers didn’t find the seat comfortable, so consider buying a seat separately.
“The Woodbridge T-0001-CH is an affordable, modern classic one-piece design that’ll impress.”
Our next pick is the Woodbridge due to its budget-friendly price and solid features.
The dual flush system averages about 1.2 gallons per flush, saving you at least 20 percent of your annual water usage.
Smaller waste loads can be flushed with 1 gallon per flush while larger ones take up 1.6 gallons.
It has been tested for water efficiency and found to comply with EPA and CSA guidelines. The toilet has a fantastic MaP score of 1,000 grams.
The toilet uses a siphoned flushing tube that reduces noise and helps prevent leaks, clogs, and other problems caused by waste.
The Woodbridge T-0001 toilet is considered a luxurious option by many customers with its sleek and clean design. Plus, it is very easy to clean as the toilet is designed to have minimal crevices, corners, and grooves.
The skirted trapway creates a flawless look and enables easy cleaning. The flush button comes in matte black, brushed nickel, brushed gold, or oil-rubbed bronze.
A wax ring, floor bolts, and a soft closing seat, along with stainless steel seat hinges, are included.
Read more about other Woodbridge toilets in our comparison article.
Other Woodbridge T Models
Our Final Take
Buyers like the flush and dual flush option, which saves water. The flush is powerful, and the one-piece design gives a clean, modern stylish look. Several mentioned that the install is a little challenging, so consider hiring a professional if you aren’t experienced.
“The Kohler Santa Rosa is one of our one-piece favorites due to its unique design and reliable flushing strength.”
The Kohler Santa Rosa is well-priced and durably built and has many reviewer on major online retailers.
The Kohler Santa Rosa utilizes 1.28 gallons per flush. It has a 2 ⅛” fully glazed trapway which efficiently removes waste in seconds. This model has an AquaPiston canister that increases the natural suction strength.
The canister flush packs a strong water push to eliminate potential clogs due to large amounts of waste, paper, or other debris. However, customers have reported that the flush system does make a little more noise than other models.
The Kohler Santa Rosa toilet is designed with an integrated bowl and tank for a seamless and easy-to-clean design without crevices, nooks, or corners.
It’s made with a comfort height seat that offers individuals “chair like” seating, standing at 17 inches.
The seat and the lid are also included in the packaging, with clear instructions on how to set it up and adjust all the necessary screws and bolts.
The toilet is available in white, biscuit, almond, ice gray, and black. A bolt cap accessory pack, tank accessory pack, tank cover, and trip lever are included, in addition to a Quiet-Close seat. Be aware that a supply line must be purchased separately.
Read more about the Santa Rosa toilet in our full extensive review.
- White (0)
- Biscuit (96)
- Almond (47)
- Ice Grey (95)
- Black Black (7)
- K-75796 Cachet Nightlight Quiet-Close™ Elongated seat
- K-8298 C³-155 Elongated bidet seat
Other Santa Rosa Models
Our Final Take
Customers are pleased with this durable, efficient toilet. Some were not happy with the included seat, so maybe consider buying one separately. The comfort height makes this a comfortable toilet that would be a great addition to any bathroom.
“Another TOTO classic, the Eco-UltraMax is a high quality pick when you’re looking for a one-piece design yet simple and reliable.”
The TOTO Eco UltraMax saves money and water with its low water usage.
Another option made by the famous TOTO brand, this toilet is an excellent choice for just about anybody. To start, its E-max flush system consumes only 1.28 gallons per flush, saving money on water bills.
Further, the toilet has a sleek and elegant design. The Eco-Ultramax has a CEFIONTECT glaze which reduces sticking debris buildup and makes cleaning hassle-free.
The one-piece design significantly decreases any chance of leaks, and the sleek design ensures an easy-to-clean surface for the entire model. The toilet comes in three models: elongated bowl with CEFIONTECT with a SoftClose seat, an elongated bowl with a SoftClose seat, or a round bowl with a SoftClose seat.
The toilet comes in cotton, bone, colonial white, or Sedona beige. A chrome trip lever is included.
- SS114 SoftClose seat
Other TOTO Eco Ultramax Models
Our Final Take
This toilet was an easy install for most buyers. Has a powerful clog-free flush leaving a clean bowl for most reviewers. It also comes with a soft close seat, which means one less accessory to purchase. The tank is smaller than older models, lending itself to a sleek and modern look.
“We’ll rave about the Kohler Veil to anyone that will listen. Its comfort, sleek one-piece design, smart technology, and customizable features are unbeatable.”
The Kohler Veil toilet is most distinguishable by it’s design. Smooth, sleek, and elegant, this toilet looks almost futuristic with its minimalist style. In addition to its unique look, the toilet has great quality customizable features that we love.
The Kohler Veil meets all ADA code requirements and comes with an upgraded 17” chair height seating, which is comfortable for all.
One of our favorite Kohler Veil features is its special pump-assisted dual flush that allows peak flushing performance each time. The pump only consumes 0.8 to 1.19 gallons of water per flush, making the toilet sustainable and cost effective.
The tankless unit also easily attaches to the main water supply line. The Kohler Veil uses an in-wall insulated and durable tank and carrier system, saving you much more space than other Veil one-piece elongated dual flush skirted trapway toilet. The Veil also has an actuator plate for easy flushing.
In the case of an emergency, the Kohler Veil includes a backup feature that works even during a power outage – with up to 100 flushes! This is a great development from the 2021 Kohler Veil, which does not include flush support or any of the smart tech features.
The toilet comes with an LCD remote control that adjusts the temperature, pressure, light, and more. With the touch of a button, you can customize the toilet to your liking. Activate the seat warmer during cold nights or utilize and adjust the warm-air drying system when you’re done. Motion-activated hands-free Quiet-Close™ cover works like a charm as well.
Unlike its intelligent counterpart, the Kohler Brazn, the Kohler Veil utilizes Kohler’s UV Light Cleaning Technology which sanitizes your bidet wand, reducing bacteria automatically by 99.9% every 24 hours. Sanitization is automatic, so you don’t have to worry about cleaning after you’re done.
While the Kohler Veil is a bit pricey, especially when compared with the Kohler Brazn and Karing 2.0, we think it’s pump assisted flush and personalized settings make it well worth the buy.
The Kohler Veil’s seat height also reduces tension on your knees by elevating your sitting position nearly two inches higher than the other models.
Facts Worth Noting
- Uses 2” x 6” studs.
- Tank installs inside the wall
- Dual flush offers a choice of 0.8 or 1.19 gpf (3.0 or 4.5 lpf)
- Automatic self-cleaning function utilizes UV light and electrolyzed water systems
- Has automatic deodorization system
- Includes motion-activated, hands-free opening/closing features
- Emergency flush supports up to 100 flushes during power outage
- Comes with complete toilet and seat, supply stop valve, braided inlet supply hose, power cord, and remote control
- Does not come with a bidet seat
*Also to note, the Kohler Veil is only available in white.
Other Kohler Veil Models
Our Final Take
The Kohler Veil has overwhelmingly positive reviews, with customers boasting about the heated seat, night-light, and hands-free open/closing features. Most users agree the toilet is a high-quality investment piece. Some customers mention the toilet’s installation may be a bit difficult for certain plumbers due to the model’s weight.
“The TOTO Neorest is irresistible with its adjustable bidet features, along with heating options and air-purifying system. Its another great one-piece toilet option”
If you’re looking to splurge for some extra perks, the TOTO Neorest one-piece toilet is the way to go.
The toilet has a dual flushing mechanism, using 0.8 gallons per flush or 1 gallon depending on the waste load. Even with its water efficiency, the Tornado Flush siphon jet flushing system is ultra powerful, eliminating chances of streaks or stains. The toilet also has a backup manual flush that can be used in emergency situations.
The toilet has an auto flush option allowing you to have a hands free bathroom experience.
The TOTO Neorest comes with a multifunctional remote that activates the bidet. The bidet has three wash modes, front, rear, and soft, and has oscillating and pulsing comfort washing. You can adjust the spray position for maximum comfort levels as well.
While the TOTO Neorest is pricier than the other TOTO models on this list, it comes with many convenient features that improve the user experience.
The toilet has an energy saver timer and a built-in air purifying system to get rid of nasty lingering odors. On this model, you can control the flush and set the seat temperature by using the battery-operated remote control.
The toilet’s skirted design and high-profile tank make cleaning easy while the non-stick finish practically eliminates instances of solid waste sticking around. TOTO’s CEFIONTECT technology further eliminates cleaning time by reducing bacterial buildup.
The toilet bowl is made of vitreous china while the seat and cover are made of plastic. It is ADA compliant, with a seat height of 17 ¼”. The toilet’s top unit is only compatible with the CT992CUMFG elongated bowl. The toilet is only available in white.
Other TOTO Neorest Models
Our Final Take
Buyers agree that this toilet is worth the hefty price tag! This stylish toilet is an investment for your home. Users like that along with its effective flush, the toilet includes features to assist with your personal hygiene. Reviews praise the seat for being comfortable and heated.
7. TOTO Eco Soiree
“The TOTO Eco Soiree is a well thought out one-piece toilet that’s both sustainable and aesthetically pleasing.”
This dependable toilet has a large, box-like base that takes up a bit more space in your bathroom than other models.
The TOTO Eco Soiree toilet is designed with a double cyclone flush system that uses a minimal amount of water to still clean the toilet bowl thoroughly. The Eco Soiree uses 1.28 gallons per flush in its high efficiency Tornado Flush system. With just one press of the lever, water swirls around the bowl picking up all the waste and potential residue which is then sucked out by the large flush valve.
The seat is designed at a height of 17 ⅜” making it optimal for short and tall individuals alike. The toilet is ADA compliant and comes with an elongated front bowl and SoftClose seat.
Though optional, we recommend getting the CEFIONTECT glaze to reduce bacterial buildup on the toilet’s exterior. The TOTO-patented glaze requires only a wipe down with mild soap and water. The skirted trapway also eliminates dirt accumulation in any nooks or crannies.
The toilet’s trip lever has a chrome finish that prevents rusting, scratches, and scuff marks.
Similarly, the porcelain is easy to clean and much more resistant to water and rust markings. The Eco Soiree is available in cotton, bone, colonial white, Sedona beige, and ebony (not available in CEFIONTECT).
10 inch or 14 inch rough-ins are sold separately.
Get to know more about the TOTO Eco Soiree in our full ultimate review here.
- SS214 SoftClose seat
Our Final Take
Customers like the Eco Soiree's Tornado flush system and fully ADA-compliant features. The toilet is installed with the trip lever on the approach side. However, this toilet is pricier than many similar units that have the same standard features. Without a bidet or heating features, this toilet is a standard, no-frill model at a higher price than necessary.
8. TOTO Ultramax Toilet
“Just as its name suggests, the TOTO Ultramax knocks it out of the park with its winning G-Max flushing system and one-piece design.”
The easy-to-use TOTO Ultramax toilet keeps it simple, but classy.
The TOTO Ultramax’s G-Max flushing system uses an extra-large siphon jet for maximum suction power and a wide 3” flush valve to pack a punch in every flush.
The toilet’s fully glazed trapway also reduces the chance of clogging. The Ultramax uses 1.6 gallons per flush, which fully washed away large waste and any potential streaks.
This model is reliable with a relatively low flush noise level.
Like most TOTO toilets, the Ultramax comes with the CEFIONTECT glaze to reduce any grime accumulation on the toilet bowl and exterior. The one-piece design and high-profile tank only needs slight maintenance with a simple water and soap wipe down.
The toilet seating stands at a standard 15 11/16”.
The Ultramax comes in three models: an elongated bowl with CEFIONTECT and SoftClose seat, an elongated bowl and SoftClose seat, or a round bowl with a SoftClose seat.
- Cotton (01)
- Bone (03)
- Colonial White (11)
- Sedona Beige (12)
- SS114 SoftClose seat
Other TOTO Ultramax Models
Our Final Take
Overall, customers are satisfied with the effective flush of this toilet and its comfortable height. The most common complaint is the toilet’s state upon arrival. Many individuals report receiving broken parts, such as a fractured bowl. After contacting customer service, they were able to get new parts re-ordered at no extra cost.
9. Kohler Kathryn Toilet
“Not only do we love the one-piece design, but the Kohler Kathryn’s fun color selection that allows you to match your bathroom decor.”
Audio Review of the Kathryn
This toilet is compatible with other items in the Kohler Kathryn collection, so if you like what you see, there’s other varieties.
The Kohler Kathryn one-piece toilet is another phenomenal example of Kohler’s AquaPiston technology being put to work. The toilet’s flush valve optimizes performance by using the natural force of gravity to expel large waste loads.
The toilet’s canister lets water flow into the bowl from all angles and requires less actuation force than standard flappers. Just like the Santa Rosa, this model’s canister design reduces the chance of leakage by having 90% less exposed material than a 3” flapper.
The toilet delivers a fast and powerful flush even while consuming only 1.28 gallons of water.
The Kohler Kathryn comes in a comfort height, seating at 16 ⅜”. The toilet is designed with a concealed trapway and clean caps with low profile bolts to make cleaning especially simple.
The Kathryn comes with a Quiet-Close Quick-Release toilet that is easily removable for thourough cleaning.
The toilet’s polished chrome trip lever is left-handed. A supply line is not included.
The toilet comes in white, biscuit, dune, ice grey, sandbar, Mexican sand, cashmere, thunder grey, or black black.
- K-75796 Cachet Nightlight Quiet-Close™ Elongated seat
- K-4108 C³-230 Elongated bidet toilet seat
Other Kohler Kathryn Models
Our Final Take
This toilet gets high ratings from its buyers. Many were pleased with the modern design of the toilet, making it a great addition to their bathrooms. Installation was easy, and it has an effective flush, even with its minimal water usage. Unfortunately, some users report receiving mismatched parts in the mail that required a reorder from the manufacturer.
10. SaniCanada 942 Toilet
“Compact and sleek one-piece design, the SaniCanada London is as simple as they come.”
Audio Review of SaniCanada
The last toilet to make our one-piece toilet list is the SaniCanada London. We liked the model's simple and clean look, as well as the dual-flush mechanism.
This toilet comes with a dual-flush system for either a 0.8 or 1.28-gallon flush, which saves lots of water. The London toilet requires almost no maintenance and can be cleaned in a matter of minutes. The Dual Hurricane Flush system expels waste in a forceful yet in a low noise manner.
Its standard 15.5” bowl height is suitable for most users and the elongated bowl provides an added layer of comfort while sitting. The toilet is made of glazed ceramic, with a sleek, glazed skirted trapway. The toilet has no ridges so dirt or grime can be wiped off in one swipe.
The toilet comes with side bolt cover parts, a tank lid with chrome actuator push buttons, a quick-release toilet seat with hinges, and a wax ring.
- SaniCanada #UFKJ201 Elongated toilet seat
Our Final Take
Users tend to like the SaniCanada London because of its simple nature. The unit is praised for its modern look and flushing system. Some users report having difficulties installing the unit, eventually calling for professional help.
Choosing the right one-piece toilet is not always simple. There are various things to consider, which might be difficult if you are buying a one-piece toilet for the first time.
Here we've listed four important details to keep in mind when choosing your next toilet.
Dimensions and Rough-in Requirement
Most toilets are a standard 12 inches from the wall, which is called a rough-in dimension. However, be sure to measure your bathroom's rough-in before buying a toilet, in case you need a 10 or 14 inch option instead. It's also important to keep an ideal seat height in mind to ensure you new toilet will fit every member of the family.
Water efficiency has two advantages: it saves you money in water bills, while also saving the environment. Most modern toilets consume 1.28 gallons of water per flush while maintaining plenty of flush power. Some toilets might use up to 1.6 gallons, but not water-efficient.
It’s a common belief that the more water the toilet uses, the cleaner it will be. Wrong!
Toilets usually account for 30 percent of water usage in an average household. To combat wasting water, modern toilets use much less water while maintaining efficiency (1.28 gpf). Look for a model with an EPA WaterSense label to ensure you purchase an efficient option.
The obvious advantage of one-piece toilets is the ease of cleaning.
Since the bowl and the tank are seamless, there's no place for bacteria to hide in a seam. Additionally, the chance of leaking is minimal, since the bowl and the tank has no seam. We recommend a model with a simple and sleek one-piece design for this reason.
Talking about cleaning, we created a how-to article about homemade toilet cleaning methods.
Any type of equipment, including toilets, is more durable with fewer parts. A two-piece toilet has a rubber gasket, which can cause leaking over time.
By looking for a simple one-piece option with minimal parts, you'll lower your risk of broken seals or loose bolts over time. Pay attention to user reviews and warranty options as well to ensure you invest in a durable, high quality toilet.
Of course, one-piece models have some disadvantages, too. First, they are can be a little more expensive, and if you buy a cheaper model, it can be a risk of a cheaper made toilet without features.
Also, if the toilet bowl cracks, you cannot replace just the bowl or tank separate without buying a completely new toilet..
Many one-piece toilets are usually smaller and lower height, which is not ideal for tall people.
Weight could also be a concern, they are typically slightly more heavy being a large single piece. Carrying just the bowl or tank is much lighter to carry and easier to fit together while installing.
It's easy if you follow our full toilet install guide.
It's actually very simple, but the process can vary depending on the specific toilet.
Frequently Asked Questions
We carefully answered the most asked questions by our readers about one-piece toilets.
Obviously, the best one-piece toilet should be affordable. If it features a dual-flush option, even better. Among the many brands that we tested, TOTO seems to be the market leader. Their toilets are also among the most comfortable.
One-piece models don’t have any space between the tank and bowl, which prevents the dirt and debris from buildup. Also, they are usually low profile.
If you have some basic DIY skills, installing a one-piece toilet shouldn’t be a problem. However, you should still call a professional to prevent voiding your warranty.
One-piece toilets use much less water than standard units. It saves the environment, and it also reduces your monthly water bills.
Yes. They typically use less water, but they have specific flushing mechanisms. These mechanisms allow one-piece models to flush completely clean, with less water involved.
One-piece toilets are more expensive than their two-piece counterparts.
Anywhere from 14"-18" depending on the model.
The most popular brands for one-piece toilets include Kohler, TOTO, American Standard and Woodbridge. Our Editor’s Choice one-piece toilet is the Kohler Veil - take a look at our article reviewing the entire Kohler line for more information!