Best One-Piece Toilets with Seamless Designs – 11 Reviewed in 2022

We’re starting off this list strong, with our all-time favorite – the Champion 4. This toilet is another solid choice that prioritizes water efficiency and suction strength. 

Flushing Power

This toilet uses 1.6 gallons per flush and is a leader in clog-free performance after many uses. The unit’s quiet flush can move up to 70% larger masses than most toilets because of the Champion 4 Flushing System. 

The four-inch piston Accelerator flush valve helps remove most waste loads in just one flush. The extra-large trapway also eliminates waste quickly and hassle-free. The toilet’s MaP score is 1,000 grams – it doesn’t get better than that!

The Design 

This features a “right height” of 16.5 inches, to ensure maximum comfort. It is ADA-compliant, with a comfortable elongated siphon action jetted bowl. 

The unit 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, with a chrome trip lever. The lever can be swapped for a white, polished brass, or satin one instead. The toilet comes with a ten-year warranty. 

Read more about the American Standard Champion 4 with our spotlight article here.

Our next pick is this Woodbridge model because of its budget-friendly price and solid features. 

Flushing Power

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 the strict 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. 

Design

The Woodbridge elongated 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 Woodbridge toilets here.

The Kohler Santa Rosa is well-priced and durably built. Its elongated tank makes the model unique yet functional, as various items can be set upon it. 

Flushing Power

The Kohler Santa Rosa utilizes 1.28 gallons per flush. It has a 2 ⅛” fully glazed trapway that efficiently removes waste in a few seconds. The model has an AquaPiston canister that increases the natural suction strength. 

The canister flush packs a strong water push to eliminate any possible clogs due to waste, paper, or other debris. However, customers have reported that the flush system does make a little more noise than other models in this price segment.

Design 

The Kohler Santa Rosa elongated toilet is designed with an integrated bowl and tank for a seamless and easy-to-clean design without any crevices, nooks, or corners.

It is 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. A supply line must be purchased separately. 

Read more about the Santa Rosa toilet in our review here.

The Eco-UltraMax saves you money and water with its low water usage. 

Flushability 

Another option made by the famous TOTO brand, this toilet is an excellent choice for just about anybody. To start, its E-max system consumes only 1.28 gallons per flush, saving you money on bills each month.

Design

Further, the toilet has a sleek, and elegant design. The Eco-Ultramax has CEFIONTECT glaze that reduces bacterial 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: an elongated bowl with CEFIONTECT and 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.

The Kohler Veil Comfort Height toilet is most distinguishable by its design. Smooth, sleek, and elegant, the toilet looks almost futuristic with its minimalist style. In addition to its interesting look, the toilet has great quality customizable features that we love. 

The Kohler Veil meets all ADA code requirements, unlike the Kohler Karing 2.0, and comes with an upgraded 17” chair-level seat, comfortable for all. 

Flushing Power

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 .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 the 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 Comfort Height’s smart-tech features. 

Customizable 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.

Cleanliness

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’s one-piece design, we think its’ pump-assisted flushing and personalized settings make it well worth the buy. The Kohler Veil’s Comfort Height also reduces tension on your knees by elevating your sitting position nearly two inches higher than the other models, such as the Veil Wall-hung Compact elongated dual-flush toilet.

You can watch Kohler’s Veil Intelligent Toilet with Bidet Seat overview video here to get a more visual understanding of the toilet’s inner workings.

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. 

If you’re looking to splurge for some extra perks, the TOTO Neorest is the way to go. 

Flushing

The toilet has a dual flushing mechanism, using .8 gallons per flush or 1 gallon depending on the wasteload. 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. 

Bidet Features

The TOTO Neorest comes with a multifunctional remote that turns on 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. 

Other Features

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.

This dependable toilet has a large, box-like base that takes up a bit more space in your bathroom than other models. 

Flushing

TOTO toilets are designed with a double cyclone flush system that uses a minimal amount of water to still clean the toilet bowl thoroughly. The toilet 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. 

Design 

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 one-piece skirted design 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 toilet is available in cotton, bone, colonial white, Sedona beige, and ebony (not available in CEFIONTECT). 

A 10” or 14” Unifit rough-in is sold separately. 

Get to know more about the TOTO Eco Soiree in our review here.

This easy-to-use toilet keeps it simple but classy. 

Flushing

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 wipes away waste and any potential streaks. 

This model is reliable, with a relatively low flush noise level. 

More Features

Like most TOTO toilets, the Ultramax comes with the CEFIONTECT glaze to reduce any grime accumulation on the toilet’s exterior. Furthermore, the one-piece design and high-profile tank only need slight maintenance, with a simple water and soap combo. The toilet 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. 

The toilet is available in four colors: cotton, bone, colonial white, and Sedona beige

The Kohler Santa Rosa’s name isn’t the only thing that’s beautiful about the unit. 

Flushing

This toilet uses 1.28 gallons per flush. What makes the Kohler Santa Rosa’s flushing technology so strong is the combination of the AquaPiston canister, precision-engineered tank, and fully glazed trapway. Only two pounds of force is needed to flush the toilet. 

Each flush effectively swirls around the bowl to pick up any waste that’s then suctioned into the drain in a matter of seconds. 

The toilet’s canister reduces chances of leakage by having 90% less exposed seal material than traditional 3” flappers. The canister also requires less actuation force than typical flappers. 

Design 

The Kohler Santa Rosa has a Comfort Height of 16.5” that’s easy on the knees and legs. The elongated bowl distributes user body weight for an increased comfort level. The toilet comes with a Quiet-Close elongated seat as well. 

The Santa Rosa includes a bolt cap accessory pack, tank accessory pack, tank cover, and trip lever. It’s important to note that a supply line must be purchased separately. The toilet comes in white, biscuit, almond, ice gray, and black. The polished chrome trip lever is located on the left-hand side.

This toilet is compatible with other items in the Kohler Kathryn collection, so if you like what you see, there’s more where that came from!

Flushability 

The Kohler Kathryn Comfort Height 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 any type of waste. 

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. 

Design

The Kohler Kathryn is a Comfort Height model, standing at 16 ⅜”. The toilet is designed with a concealed trapway and Clean Caps low-profile bolts to make cleaning especially simple. 

The Kathryn comes with a Quiet-Close Quick-Release toilet that is easily removable for deep 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.

Features

This toilet comes with a dual-flush system for either a 0.8 or 1.28-gallon flush, which saves lots of water annually. The 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 low-noise manner. 

Its standard 15.5” bowl height is suitable for most users and the elongated bowl provides an added layer of comfort. 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, a wax ring, and toilet bowls.