Though one-piece toilets tend to be less common than two-piece ones, they offer a sleek design that’s both functional and aesthetically pleasing. One-piece toilets are also easier to clean and have a lower risk of leaking as well.
Two-piece toilets seem to have the same features as their one-piece counterparts and often cost much less. So, why are one-piece units so popular? And what are the advantages of those toilets?
Below we share some considerations when looking for a new toilet, and our top choices for the best one-piece toilets!
Table of Contents
- Our Top One-Piece Picks
- Comparison of the Best One-Piece Toilets in 2023
- Advantages of One-Piece Toilets
- Reviews of the Top 11 One-Piece Toilets on the Market
- 1. American Standard Champion 4 – Strongest Flush
- 2. Woodbridge T-0001-CH – Review Champion
- 3. Kohler Santa Rosa – Most Reviewed
- 4. TOTO Eco Ultramax – Runner Up
- 5. Kohler Veil – Editor’s Choice
- 6. TOTO Neorest – Most Water Efficient
- 7. TOTO Eco Soiree
- 8. TOTO Ultramax Toilet
- 9. Kohler Santa Rosa Black Toilet
- 10. Kohler Kathryn Toilet
- 11. SaniCanada 942 Toilet
- Buyer’s Guide
- Few Disadvantages
- Installation Process
- Frequently Asked Questions
Our Top One-Piece Picks
› | Kohler Veil | |
---|---|---|
› | Most Water Efficient: | TOTO Neorest |
› | American Standard Champion 4 | |
› | WoodBridge T-0001-CH | |
› | Most Reviewed: | Kohler Santa Rosa |
› | Runner Up: | TOTO Eco Ultramax |
Comparison of the Best One-Piece Toilets in 2023
Advantages of One-Piece Toilets
✓ Easier to Clean
To start, with no crevices or joints, one-piece toilets have no place for dirt or bacterial buildup on their exterior, which is a big upside. They are also much easier to maintain because they have a lower chance of breaking or leaking.
✓ No Drill Holes to Support Tank
To install a standard two-piece toilet, you would have to drill holes to support the water tank. You won’t have that problem with single-piece models, making their installation process a lot simpler.
✓ Seamless Design with Fewer Separate Parts
One-piece models are often smaller, making them ideal for compact bathrooms. Plus, they have a sleeker design that fits well with modern bathrooms. Finally, single-piece toilets come as a whole unit, which prevents possible problems with shipping.
Reviews of the Top 11 One-Piece Toilets on the Market
1. American Standard Champion 4 – Strongest Flush
“The American Standard Champion 4 is a top pick because of its super-strength flushing power and fantastic design.”
- Flushing Score:
- Water Consumption: 1.6
- Bowl Shape:
- Flushing System: Champion 4 Flushing System
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 29.75″ x 16.75″ x 29.5″
- – 12″
- – 2.37″
- – 17.25″
- Powerful Champion 4 Flushing System that takes care of waste in one flush
- ADA-compliant height and bowl shape
- Large four-inch piston Accelerator flush valve
- Great color selection
- Model tends to come in on the pricier side
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.
Color Options
- White
- Bone
- Linen
Seat Options
- Champion Slow Close Elongated #5325.010
Product Documentation
Other Champion 4 Models
Our team collected all Champion 4 model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Champion PRO | 211AA104.020 | Two-piece | 1.28 | Elongated | EPA Compliant | Spec Sheet |
Portsmouth Champion PRO | 213CA104.020 | Two-piece | 1.28 | Elongated | Water efficient and uses single flush type | Spec Sheet |
Retrospect Champion PRO | 212BA104.020 | Two-piece | 1.28, 1.6 | Round | PowerWash® rim scrubs bowl with each flush | Spec Sheet |
Summary of Recent Reviews
This comfort height toilet is a favorite among reviewers. Several mention its 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.
2. Woodbridge T-0001-CH – Review Champion
“The Woodbridge T-0001-CH is an affordable, modern classic that’ll impress any user.”
- Flushing Score:
- Water Consumption: 1.0/1.6
- Bowl Shape:
- Flushing System:
- Flush Type:
- Style: One-Piece
- Dimensions (sourced from manual):
- Toilet – 28.5″ x 14.5″ x 27.5″
- – 12″
- – 2.12″
- – 17.44″
- Averages an eco-friendly and cost-effective 1.28 gallons per flush
- Well priced unit
- Strong suction strength
- Flush buttons tend to stick over time
- Water line can be difficult to attach
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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.
Additional Models
Product Documentation
- Spec Sheet (PDF)
- Product Install Guide (PDF)
- Manufacturer Product Listing
What Buyers Say
Buyers like the power of this flush, and that it has a dual flush option, allowing you to save on water. The flush is powerful, and the one-piece gives a clean, stylish look. Several mentioned that this install is a little challenging so consider hiring a professional if you aren’t experienced.
3. Kohler Santa Rosa – Most Reviewed
“The Kohler Santa Rosa is one of our favorites because of its smart design and reliable flushing strength.”
- Flushing Score:
- Water Consumption: 1.28
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 27.75″ x 18.75″ x 28.19″
- – 12″
- – 17.25″
- Water-efficient flushing system uses 1.28 gallons per flush
- Great color selection
- 17” seat height
- Supply line not included
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.
Color Options
- White (0)
- Biscuit (96)
- Almond (47)
- Ice Grey (95)
- Black Black (7)
Seat Options
- K-75796 Cachet Nightlight Quiet-Close™ Elongated seat
- K-8298 C³-155 Elongated bidet seat
Product Documentation
Other Kohler Santa Rosa Models
Our team collected all Kohler Santa Rosa model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Santa Rosa | K-3811-0 | One-piece | 1.6 | Elongated | AquaPiston® canister allows water to flow into the bowl from all sides (360°) | Spec Sheet |
Santa Rosa | K-30810-RA-0 | One-piece | 1.28 | Elongated | Easy-to-flush canister design requires less force to actuate than a 3" (76 mm) flapper | Spec Sheet |
Santa Rosa | K-30810-0 | One-piece | 1.28 | Elongated | Revolution 360 swirl flushing technology keeps the bowl clean longer | Spec Sheet |
Santa Rosa | K-30812-0 | One-piece | 1.28 | Elongated | ContinuousClean ST system to dispense cleaning solution with every flush | Spec Sheet |
What Customer Say
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.
4. TOTO Eco Ultramax – Runner Up
“Another TOTO classic, the Eco-UltraMax is a high quality pick when you’re looking for something simple yet reliable.”
- Flushing Score:
- Water Consumption: 1.28
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 28.25″ x 16.62″ x 27.16″
- – 12″
- – 15.7″
- Efficient 1.28 gallons per flush
- CEFIONTECT glaze reduces bacterial buildup
- Good color selection
- Some users report installation parts missing from their order
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.
Seat Options
- SS114 SoftClose seat
Product Documentation
Other TOTO Eco Ultramax Models
Our team collected all TOTO Eco Ultramax model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Eco Ultramax | MS854114E#01 | One-piece | 1.28 | Elongated | Elongated one-piece toilet | Spec Sheet |
Eco Ultramax | MS853113E#01 | One-piece | 1.28 | Round | Round bowl one-piece toilet | Spec Sheet |
Eco Ultramax | MS854114EG#01 | One-piece | 1.28 | Elongated | With CEFIONTECT Ceramic Glaze elongated one-piece toilet | Spec Sheet |
Eco Ultramax | MS854114ELG#01 | One-piece | 1.28 | Elongated | Elongated bowl with CEFIONTECT® ceramic glaze. ADA Compliant toilet | Spec Sheet |
Our Take on Reviews
This toilet was an easy install for most buyers. The flush is powerful, leaving a clog-free, clean bowl for most reviewers. This 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, modern look.
5. Kohler Veil – Editor’s Choice
“We’ll rave about the Kohler Veil to anyone that will listen. Its comfort, smart technology, and customizable features are unbeatable.”
- Flushing Score:
- Water Consumption: 0.8/1.19
- Bowl Shape:
- Flushing System: Pump-assisted flushing
- Flush Type:
- Dimensions (sourced from manual):
- Toilet – 26.13″ x 17.25″ x 21.46″
- – 12″
- – 17.44″
- Its high-tech features allow users to customize settings to their liking
- The Comfort Height features provide great sitting support.
- The cleansing elements and deodorization system automatically kill lingering bacteria.
- The occasional weak flushing mechanism
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.
Product Documentation
Other Kohler Veil Models
Our team collected all Kohler Veil model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Veil | K-1381-HC-0 | One-piece | 0.8, 1.28 | Elongated | Hidden cord design conceals bidet seat cords. Includes bidet water inlet hose. | Spec Sheet |
Veil | K-5402-0 | One-piece | 0.8, 1.6 | Elongated | One-piece wall-hung smart toilet with integrated cleansing and dual flush functionality | Spec Sheet |
Veil | K-76395-0 | One-piece | 0.8, 1.6 | Elongated | Wall-hung compact elongated smart toilet bowl. Motion-activated, hands-free opening/closing of cover. | Spec Sheet |
Veil | K-1381-0 | One-piece | 0.8, 1.28 | Elongated | One-piece elongated toilet with skirted trapway, dual-flush | Spec Sheet |
Veil | K-6299-0 | One-piece | 0.8, 1.6 | Elongated | One-piece wall-hung toilet. ADA compliant. | Spec Sheet |
Veil | K-6300-0 | One-piece | 0.8, 1.6 | Elongated | Wall-hung elongated toilet bowl with hidden cord capability | Spec Sheet |
Our Take on the Reviews
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.
6. TOTO Neorest – Most Water Efficient
“The TOTO Neorest is irresistible with its adjustable bidet features, along with heating options and air-purifying system.”
- Flushing Score:
- Water Consumption: 0.8/1.0
- Bowl Shape:
- Flushing System:
- Flush Type:
- Style: One-Piece
- Dimensions (sourced from manual):
- Toilet – 31.46″ x 17.64″ x 20.75″
- – 12″
- – 17.25″
- Adjustable bidet with three wash modes
- Built-in air purifying system and heated seat option
- ADA compliant
- On the pricier side
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.
Additional Models
Product Documentation
Other TOTO Neorest Models
Our team collected all TOTO Neorest model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Neorest RH | MS988CUMFG#01 | One-piece | 1.0, 0.8 | Elongated | The design of the RH is characterized by soft curves without sharp corners | Spec Sheet |
Neorest AH | MS989CUMFG#01 | One-piece | 1.0, 0.8 | Elongated | The AH has an edgy shape that leaves a sharp impression when seen from any angle | Spec Sheet |
Neorest NX1 | MS900CUMFG#01 | One-piece | 1.0, 0.8 | Elongated | Has sophisticated elliptical silhouette which is inspired by the simple, organic beauty of an earthen vase hand thrown by a craftsman on a pottery wheel | Spec Sheet |
Neorest NX2 | MS901CUMFX#01 | One-piece | 1.0, 0.8 | Elongated | ACTILIGHT® Clean light cleaning system built in the lid | Spec Sheet |
Neorest EW | CWT994CEMFG#01 | One-piece | 1.28, 0.9 | Square | Ultra-modern wall-hung design. Back-up manual flush | Spec Sheet |
Neorest AC | CWT996CEMFX#01 | One-piece | 1.28, 0.9 | Square | Features revolutionary technologies such as Actilight® and eWater+® to help reduce the need for frequent cleaning | Spec Sheet |
Neorest 750H | MS993CUMFX#01 | One-piece | 1.0, 0.8 | Elongated | Neorest 750H delivers an unparalleled sense of relaxation to you in the most comforting and refreshing ways possible | Spec Sheet |
The Review Buzz
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 toilet that’s both sustainable and aesthetically pleasing.”
- Flushing Score:
- Water Consumption: 1.28
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Style: One-Piece
- Dimensions (sourced from manual):
- Toilet – 28.13″ x 17.7″ x 27.75″
- – 12″
- – 2.12″
- – 17.37″
- Tornado Flush system only uses 1.28 gallons per flush
- Comfortable 17 ⅜” height
- SoftClose seat included
- Users report the bottom drain being non-symmetrical
- On the pricier side without many additional features
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.
Seat Options
- SS214 SoftClose seat
Product Documentation
Summary of Recent Reviews
Customers like the toilet’s Tornado flush system and fully ADA-compliant features, if 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.”
- Flushing Score:
- Water Consumption: 1.6
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 28.12″ x 16.61″ x 27.18″
- – 12″
- – 15.7″
- Powerful G-Max flushing system
- Good color selection
- CEFIONTECT glaze available
- Reviewers report receiving a fractured bowl upon delivery
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.
Color Options
- Cotton (01)
- Bone (03)
- Colonial White (11)
- Sedona Beige (12)
Seat Options
- SS114 SoftClose seat
Product Documentation
Other TOTO Ultramax Models
Our team collected all TOTO Ultramax model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Ultramax | MS853113S#01 | One-piece | 1.6 | Round | Round Bowl with SoftClose Seat | Spec Sheet |
Ultramax | MS854114SL#01 | One-piece | 1.6 | Elongated | ADA Compliant | Spec Sheet |
The Reviewer Buzz
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 Santa Rosa Black Toilet
“The Kohler Santa Rosa’s AquaPiston Canister Flush Valve steals the show in this model.”
- Flushing Score:
- Water Consumption: 1.28
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 27.75″ x 18.75″ x 28.19″
- – 12″
- – 17.25″
- Strong suction power that uses 1.28 gallons per flush
- Fantastic color selection
- Easy to install
- Reviews report the toilet coming shattered upon delivery
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.
Seat Options
- K-75796 Cachet Nightlight Quiet-Close™ Elongated seat
- K-8298 C³-155 Elongated bidet seat
Product Documentation
Other Kohler Santa Rosa Models
Our team collected all Kohler Santa Rosa model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Santa Rosa | K-3811-0 | One-piece | 1.6 | Elongated | AquaPiston® canister allows water to flow into the bowl from all sides (360°) | Spec Sheet |
Santa Rosa | K-30810-RA-0 | One-piece | 1.28 | Elongated | Easy-to-flush canister design requires less force to actuate than a 3" (76 mm) flapper | Spec Sheet |
Santa Rosa | K-30810-0 | One-piece | 1.28 | Elongated | Revolution 360 swirl flushing technology keeps the bowl clean longer | Spec Sheet |
Santa Rosa | K-30812-0 | One-piece | 1.28 | Elongated | ContinuousClean ST system to dispense cleaning solution with every flush | Spec Sheet |
Buyer’s Buzz
Buyers like this stylish, powerful toilet with its sleek and modern look. Users rave about the flushing power and comfort height. While some experienced issues with the toilet shattering during shipping, they were able to quickly receive replacements.
10. Kohler Kathryn Toilet
“We love the Kohler Kathryn’s fun color selection that lets the toilet blend in or stand out in your bathroom, depending on your preference.”
- Flushing Score:
- Water Consumption: 1.28
- Bowl Shape:
- Flushing System:
- Flush Type: Single
- Dimensions (sourced from manual):
- Toilet – 28″ x 17.5″ x 28.63″
- – 12″
- – 17.37″
- Easy installation process that doesn’t require professional help
- Awesome color selection
- AquaPiston technology that optimizes flushing performance
- Mismatched base and cover sizes that required a reorder
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 black.
Seat Options
- K-75796 Cachet Nightlight Quiet-Close™ Elongated seat
- K-4108 C³-230 Elongated bidet toilet seat
Product Documentation
Other Kohler Kathryn Models
Our team collected all Kohler Kathryn model variations within this collection to help you compare the differences.
Model Name | Model Number | Style | GPF | Bowl Shape | Major Differences | Resources |
Kathryn | K-3940-RA-0 | One-piece | 1.28 | Elongated | One-piece compact elongated 1.28 GPF chair height toilet with right-hand trip lever. | Spec Sheet |
We Read the Reviews
This toilet gets high reviews 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.
11. SaniCanada 942 Toilet
- Water Consumption: 0.8/1.28
- Bowl Shape:
- Flush Type:
- Style: One-Piece
- Dimensions (sourced from manual):
- Toilet – 27.5″ x 14.37″ x 30.31″
- – 12″
- – 16″
- Eco-friendly dual flush system
- Quick-release soft close seat
- Installation may require professional help
The last toilet to make our piece list is the SaniCanada London. We liked the model’s simple and clean look, as well as the dual-flush mechanism.
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.
Seat Options
- SaniCanada #UFKJ201 Elongated toilet seat
Product Documentation
- Spec Sheet (PDF)
- Product Install Guide (JPG)
- Manufacturer Product Listing
Summary of Reviews
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.
Buyer’s Guide
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 buying a new one-piece toilet:
Dimensions and Rough-in Requirement
Most toilets will be 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
Water efficiency has two advantages: it saves you money while also saving the environment. But does using less water affect the flush power? Basically, most modern toilets consume 1.28 gallons of water per flush while maintaining plenty of power. Some toilets might use up to 1.6 gallons, but more than that is not water-efficient.
It’s a common belief that the more water the toilet uses, the cleaner it will be. However, high water consumption flushing leads to huge waste over time. Toilets usually account for 30 percent of water usage in an average household. To combat any water waste, modern toilets use much less water while maintaining efficiency. Look for a model with an EPA WaterSense label to ensure you purchase an efficient option.
Easy Cleaning
The obvious advantage of single-piece models is the ease of cleaning. Since the bowl and the tank are connected, there is no place for bacteria to hide. You will especially notice the difference if you’ve ever tried to clean a two-piece toilet. Additionally, the chance of leaking is minimal, since the bowl and the tank are one piece. Looking for a model with a simple and sleek design will increase the ease of cleaning.
Take a look at our homemade toilet cleaning guide
Highly Durable
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 surplus parts, you’ll lower your risk of broken parts over time. Pay attention to user reviews and warranty options as well to ensure you invest in a durable, high quality toilet.
Few Disadvantages
Of course, one-piece models have some disadvantages, too. First, they are quite expensive, and if you buy a cheaper model, it can be a risk, since they may be made of low-quality materials.
Also, if the toilet bowl breaks, you cannot replace it without buying a completely new toilet, as all the parts are within one piece.
Further, many one-piece toilets are usually smaller and lower height, which is not ideal for tall persons. However, if you buy a wall-mount toilet, you can place it a few inches higher to increase comfort.
In the end, the main downside to one-piece units is their weight. Because you can’t separate any part of the toilet, the full unit is usually quite heavy, which might be a problem during installation. We strongly advise you to call a professional to install your one-piece toilet, or at least have multiple people to help. As some one-piece models can be up to 90 pounds or heavier, installing one alone is almost impossible.
Installation Process
Installing a one-piece toilet is actually very simple, but the process can vary depending on the specific toilet.
To install your new toilet, start by turning off the water supply and getting rid of the old toilet. Remove the old toilet carefully and clean any spills or excess from the floor. Then, remove the old wax ring to make sure that the new toilet won’t leak. To completely remove the leftover wax, you should use a scraping tool.
Next, ensure that there are bolt holes in the new toilet. If there are none, you will have to drill holes on the floor. But first, remove any excess material so that it doesn’t reach the wax ring.
When you are done, it’s time to install the new wax ring. Stick the wax ring to the toilet to make sure it’s centered properly. If needed, simply rotate the ring until everything is aligned.
To lay down a new toilet, ideally, have someone else there to help. Once the bolts properly line up with the holes on the floor, bolt the toilet down. You can complete this step with nuts and washers which are usually included in the package.
Then, install the toilet flush, and finally, the toilet seat. Seats usually have plastic screws, so you simply need to put them in place and tighten them. After you’ve done the final step, turn the water back on and you are finished. Your toilet is ready for use.
Frequently Asked Questions
Obviously, the best one-piece toilet should be affordable and trustworthy while offering many of the features discussed in this article. Among the many brands that we tested, TOTO seems to be the market leader with toilets that are efficient and comfortable.
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.
Yes. Especially if you select a one-piece toilet with a strong flushing system, they’re often able to clear all waste with every flush. Even with water efficient toilets, their flushing mechanisms allow one-piece models to be completely clean, with less water involved.