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Best One-Piece Toilet (11 Popular Picks) Reviews in 2022 by Toiletable

Last updated: May 10th, 2022 by Tyler White

Two-piece toilets tend to be the most common, but investing in a one-piece toilet can give your bathroom a sleek, seamless look. Another benefit is that as one piece, they are easier to clean which is always a plus.

Below we share some considerations when looking for a new toilet, and our top choices for the best one-piece toilets!

Table of Contents

  • Comparison of the Best One-Piece Toilets in 2022
  • Our Top Picks
  • Unique Features of One-Piece Toilets
    • Design & Materials
    • Flush Type Considerations
    • Bowl Shape Considerations
  • Reviews of the Top 11 One-Piece Toilets
    • 1. Kohler Veil – Editor’s Choice
    • 2. TOTO Neorest – Most Water Efficient
    • 3. American Standard Champion 4 – Strongest Flush
    • 4. Woodbridge T-0001-CH – Review Champion
    • 5. Kohler Santa Rosa – Most Reviewed
    • 6. TOTO Eco Ultramax – Runner Up
    • 7. TOTO Eco Soiree
    • 8. TOTO Ultramax 
    • 9. Kohler Santa Rosa
    • 10. Kohler Kathryn
    • 11. SaniCanada 942
  • Choosing a One-Piece Toilet
    • Dimensions and Rough-in Requirement
    • Water Efficiency
    • Easy Cleaning
    • Highly Durable
  • Advantages of One-Piece Toilets
    • Easier to Clean
    • Seamless Design with Fewer Separate Parts
    • No Drill Holes to Support Water Tank
  • Few Disadvantages
  • Installation Process
  • Frequently Asked Questions

Best one-piece toilets

Comparison of the Best One-Piece Toilets in 2022

Editor's Choice
Kohler K-5401-PA-0 Veil Comfort Height Skirted One-Piece Elongated Dual-Flush Intelligent toilet, White
Most Water Efficient
TOTO MS992CUMFG#01 Neorest Bathroom-Hardware, Cotton White
Strongest Flush
American Standard 2034314.222 Champion 4 Right Height One-Piece Elongated Toilet, Linen
Review Champion
WOODBRIDGE T-0001-CH Toilet, with Chrome Button
Most Reviewed
Kohler 3810-0 Santa Rosa Comfort Height Elongated 1.28 Gpf Toilet with Aquapiston Flush Technology And Left-Hand Trip Lever, White
Runner Up
TOTO MS854114EL#01 Eco Ultramax ADA Elongated One Piece Toilet, Cotton White
Kohler Veil
TOTO Neorest
American Standard Champion 4
WoodBridge T-0001-CH
Kohler Santa Rosa
TOTO Eco Ultramax
Rating:
Bowl Shape:
‎Elongated
Elongated
Elongated
Elongated
Elongated
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
26.13″ x 17.25″ x 21.46″
31.46" x 17.64" x 20.75"
29.75″ x 16.75″ x 29.5″
28.5" x 14.5" x 27.5"
27.75″ x 18.75″ x 28.19″
28.25″ x 16.62″ x 27.16″
ADA Compliant?
Water Consumption:
0.8/1.19 GPF
0.8/1.0 GPF
1.6 GPF
1.0/1.6 GPF
1.28 GPF
1.28 GPF
Certifications:
EPA WaterSense
EPA WaterSense
N/A
EPA WaterSense
EPA WaterSense
EPA WaterSense
Prime?
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-
-
Cost Rating:
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Editor's Choice
Kohler K-5401-PA-0 Veil Comfort Height Skirted One-Piece Elongated Dual-Flush Intelligent toilet, White
Kohler Veil
Rating:
Bowl Shape:
‎Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
26.13″ x 17.25″ x 21.46″
ADA Compliant?
Water Consumption:
0.8/1.19 GPF
Certifications:
EPA WaterSense
Prime?
Cost Rating:
🚽🚽🚽🚽
Check Price
Most Water Efficient
TOTO MS992CUMFG#01 Neorest Bathroom-Hardware, Cotton White
TOTO Neorest
Rating:
Bowl Shape:
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
31.46" x 17.64" x 20.75"
ADA Compliant?
Water Consumption:
0.8/1.0 GPF
Certifications:
EPA WaterSense
Prime?
-
Cost Rating:
🚽🚽🚽🚽
Check Price
Strongest Flush
American Standard 2034314.222 Champion 4 Right Height One-Piece Elongated Toilet, Linen
American Standard Champion 4
Rating:
Bowl Shape:
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
29.75″ x 16.75″ x 29.5″
ADA Compliant?
Water Consumption:
1.6 GPF
Certifications:
N/A
Prime?
Cost Rating:
🚽🚽🚽
Check Price
Review Champion
WOODBRIDGE T-0001-CH Toilet, with Chrome Button
WoodBridge T-0001-CH
Rating:
Bowl Shape:
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
28.5" x 14.5" x 27.5"
ADA Compliant?
Water Consumption:
1.0/1.6 GPF
Certifications:
EPA WaterSense
Prime?
Cost Rating:
🚽🚽
Check Price
Most Reviewed
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
Rating:
Bowl Shape:
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
27.75″ x 18.75″ x 28.19″
ADA Compliant?
Water Consumption:
1.28 GPF
Certifications:
EPA WaterSense
Prime?
-
Cost Rating:
🚽🚽🚽
Check Price
Runner Up
TOTO MS854114EL#01 Eco Ultramax ADA Elongated One Piece Toilet, Cotton White
TOTO Eco Ultramax
Rating:
Bowl Shape:
Elongated
One-Piece Toilet:
Dimensions (sourced from manual):
28.25″ x 16.62″ x 27.16″
ADA Compliant?
Water Consumption:
1.28 GPF
Certifications:
EPA WaterSense
Prime?
-
Cost Rating:
🚽🚽🚽
Check Price

Our Top Picks

• Editor's Choice:Editor's ChoiceWe pick our favorite model based on style, function, customer feedback, and cost effectiveness. Kohler Veil
•Most Water Efficient: TOTO Neorest
•Highest Flush Score:Highest Flush ScoreWe chose the highest MaP score as the winner. American Standard Champion 4
•Review Champion:Review ChampionWe average reviews from top online sellers, also taking into consideration the number of reviews. We present the model most consumers are pleased with. WoodBridge T-0001-CH
•Most Reviewed: Kohler Santa Rosa
•Runner Up: TOTO Eco Ultramax

Unique Features of One-Piece Toilets

The best one-piece toilets have some unique features that set them apart from casual models, especially when it comes to high-quality units. Let’s discuss three highlighted features.

Design & Materials

installed one-piece unit Most one-piece models have a specific sleek design which makes them ideal for small and compact bathrooms. They are comfortable and convenient while also available in different heights, which is something to consider when it comes to comfort.

The standard toilet height is around 15 inches. However, you might see units with 16 or 17-inch seat height. Those couple of extra inches provide nice support to both knees and ankles but can be harder for children. Depending on who will be using the toilet, you may want a shorter or taller height.

When it comes to construction, toilets are usually made from porcelain or ceramic. You can even find plastic ones, but those are usually not very durable. Sticking to a model made from porcelain or ceramic typically helps ensure a durable, leak-free option for many years.

Flush Type Considerations

Similar to toilet bowls, there are also several types of flush technology to consider. Sometimes, different toilet brands will also feature specific flush technology. Here are some of the main options: 

  • Gravity Flush – Gravity flush is the most common flushing option. Basically, the weight of the water builds pressure which then empties and cleans the bowl. This option is also pretty quiet and requires very low maintenance.
  • Pressure Flush – Pressure flush toilets usually have a special air tank that is under pressure. This tank creates a more powerful flush but is also noisier. On the other hand, a pressure flush is much better at removing waste due to the added force from the tank.
  • Dual Flush – The main advantage of this type is its water-saving efficiency. Basically, a dual-flush toilet allows you to choose either a half-flush for liquid waste or a full flush for solid waste. By only using a half-flush for liquid waste, you’re able to both protect the environment and reduce your monthly water bills.

Bowl Shape Considerations

elongated vs rount toilet bowl There are a couple of different types of toilet bowls that you can also choose from. Prices are usually similar between both options, so the best toilet bowl type for you will depend on your personal needs.

  • Elongated: Generally speaking, elongated, or oval, bowls are better than their round counterparts in every way. They provide more comfort and are usually slightly bigger, making them ideal for children who are just learning to use an adult toilet.
  • Round Bowl: Round bowls are usually 5-6 inches smaller than elongated bowls, so they’re a great choice for a small bathroom. While they do save space, round bowls are also less comfortable.

Reviews of the Top 11 One-Piece Toilets

1. Kohler Veil – Editor’s Choice

“The editor loved this unit for its comfort, technology and packed with customizable features. We highly recommend.”

Kohler K-5401-PA-0 Veil dual flush

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 0.8/1.19 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System: Pump-assisted flushing
  • Flush Type:  DualDual Flush ExplainedChoose between a low flow or full flush action, typically has a button
  • Dimensions (sourced from manual): Toilet (26.13″ x 17.25″ x 21.46″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.44″)
    See image with dimensions
    Kohler K-5401-PA-0 Veil dimensions

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Kohler K-5401-PA-0 Veil comfort height toilet installed

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 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 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.

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. 

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WHAT WE LOVE ABOUT THE VEIL
  • Its high-tech features allow users to customize settings to their liking.
  • The Comfort Height features provides comfortable sitting support.
  • The cleansing elements and deodorization system automatically kill lingering bacteria.
WHAT NEEDED IMPROVEMENT
  • The occasional weak flushing mechanism.

Product Documentation

  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.2 of 5 stars  – 26 Total Reviews

Read Reviews

5 stars - 21 reviews
4 stars - 3 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 2 reviews
Home Depot Reviews Home Depot Reviews
 4.6 of 5 stars  – 27 Total Reviews

Read Reviews

5 stars - 23 reviews
4 stars - 1 review
3 stars - 1 review
2 stars - 0 reviews
1 stars - 2 reviews
Walmart Reviews Walmart Reviews
 4.7 of 5 stars  – 22 Total Reviews

Read Reviews

5 stars - 19 reviews
4 stars - 1 review
3 stars - 1 review
2 stars - 0 reviews
1 stars - 1 review

Our Take on the Reviews

The Kohler Veil has overwhelming 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. 

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2. TOTO Neorest – Most Water Efficient

TOTO Neorest one-piece model

Key Features
  •  Flushing Score:   800 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 0.8/1.0 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System: Dynamax Tornado FlushTOTO Tornado Flush TechnologyA flush with centrifugal and cyclonic action that rinses waste away efficiently and keeps bowl cleaner
  • Flush Type:  DualDual Flush ExplainedChoose between a low flow or full flush action, typically has a button
  • Style: One-Piece
  • Dimensions (sourced from manual): Toilet (31.46″ x 17.64″ x 20.75″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.25″)
    See image with dimensions
    TOTO MS992CUMFG#01 Neorest dimensions

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TOTO Neorest toilet installed

The Neorest is a sleek and beautiful one-piece ceramic toilet manufactured by TOTO that comes in six different colors. The skirted design and high-profile tank make cleaning easy while the non-stick finish practically eliminates instances of solid waste sticking.

The oval bowl is comfortable to sit on while the Soft Close seat makes very little noise when opened or closed. Furthermore, the water efficient cyclone siphon system uses only 0.8 to 1 gallon per flush, saving you money on water bills.

On this model, you can control the flush and set the seat temperature by using the battery-operated remote control. It also comes with gentle water spray that has pulsating and oscillating features. While this model is pricier than other options, it comes with many convenient features to improve the user experience.

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Performance Ratings

★  Remote control – 4.3 out of 5
★  Softness – 4.8 out of 5
★  Comfort – 5 out of 5

* based on Amazon’s rating system

Additional Models

One-Piece Elongated 0.8/1.0 GPF Chair Height (Model Being Reviewed)

MS992CUMFG#01 (Cotton)

One-Piece Elongated 0.8/1.0 GPF Chair Height Actilight

MS993CUMFX#01 (Cotton)

Product Documentation

  • Parts Manual (PDF)
  • Spec Sheet (PDF)
  • Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.4 of 5 stars  – 56 Total Reviews

Read Reviews

5 stars - 44 reviews
4 stars - 4 reviews
3 stars - 4 reviews
2 stars - 1 review
1 stars - 2 reviews
Lowes Customer Reviews Lowes Customer Reviews
 4.0 of 5 stars  – 4 Total Reviews

Read Reviews

5 stars - 3 reviews
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 1 review
Positive Comments (sourced from reviews)
  • Hand-free automatic flush and temperature setting
  • Sleek design fits in with any bathroom
  • Highly water efficient using only 0.8-1 gallon per flush
  • Non-sticky surface prevents staining
Negative Comments (sourced from reviews)
  • Poor customer support experiences reported
  • Expensive compared to similiar options

Summary of Recent Reviews

Buyers agree that this toilet is worth the hefty price tag!  This stylish toilet is an investment for your home.  Along with the effective flush, it includes features to assist with your personal hygiene.  The seat is comfortable and is heated for additional comfort.  “I’m going to start this by saying, BUY THIS! Yeah, it’s expensive, but you’re worth it!”

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3. American Standard Champion 4 – Strongest Flush

American Standard 2034314.222 Champion 4 toilet, linen

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.6 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System: Champion® 4 Flushing System
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (29.75″ x 16.75″ x 29.5″), Rough-inWhat is a Rough-in?Measurement between center of waste pipe and wall (12″), TrapwayWhat is a Trapway?S-shaped curved channel inside the base of the toilet. Waste travels from the bowl through the trapway, then out the bottom of the toilet. (2.37″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.25″)
    See image with dimensions
    American-Standard-2034314.222-Champion-4-dimensions

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American Standard 2034314.222 Champion-4 one-piece unit installed

The American Standard Champion 4 is the leader in clog-free performance after many uses. It also comes with a quiet flush which can move up to 70% larger masses than most toilets. Additionally, the toilet features a “right height” of 16.5 inches, to ensure maximum comfort.

The unit comes with an EverClean surface which stays clean longer than most units. Like most toilets in this price range, it features a slow-close seat. Finally, it comes with EPA WaterSense certification and American Standard offers a 10-year limited warranty. While a bit higher in price, you’re guaranteed a stress-free and comfortable experience with this toilet.

Read our ultimate article on the American Standard Champion 4

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Performance Ratings

★  Softness – 4.2 out of 5
★  Easy to Clean – 4.6 out of 5
★  Easy to Install – 4.4 out of 5
★  Value for money – 4 out of 5

* based on Amazon’s rating system

Seat Options

  • Champion® Slow Close Elongated #5325.010

Product Documentation

  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.5 of 5 stars  – 247 Total Reviews

Read Reviews

5 stars - 179 reviews
4 stars - 26 reviews
3 stars - 10 reviews
2 stars - 9 reviews
1 stars - 23 reviews
Home Depot Reviews Home Depot Reviews
 4.5 of 5 stars  – 316 Total Reviews

Read Reviews

5 stars - 230 reviews
4 stars - 48 reviews
3 stars - 11 reviews
2 stars - 12 reviews
1 stars - 15 reviews
Walmart Reviews Walmart Reviews
 4.6 of 5 stars  – 105 Total Reviews

Read Reviews

5 stars - 83 reviews
4 stars - 13 reviews
3 stars - 4 reviews
2 stars - 3 reviews
1 stars - 2 reviews
Positive Comments (sourced from reviews)
  • Very comfortable design
  • Flushing systems is quiet
  • Powerful flush that reduces clogging
  • EverClean surface minimizes staining
Negative Comments (sourced from reviews)
  • A bit pricey for a toilet

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 compliments most bathroom designs.   Some buyers didn’t find the seat comfortable, so consider buying a seat separately. 

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4. Woodbridge T-0001-CH – Review Champion

Woodbridge B0940-MB one-piece elongated toilet

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.0/1.6 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  Siphonic actionSiphonic ExplainedA traditional flush system, also known as a gravity flush, uses a vacuum action to pull waste into the trapway
  • Flush Type:  DualDual Flush ExplainedChoose between a low flow or full flush action, typically has a button
  • Style: One-Piece
  • Dimensions (sourced from manual): Toilet (28.5″ x 14.5″ x 27.5″), Rough-inWhat is a Rough-in?Measurement between center of waste pipe and wall (12″), TrapwayWhat is a Trapway?S-shaped curved channel inside the base of the toilet. Waste travels from the bowl through the trapway, then out the bottom of the toilet. (2.12″), Seat HeightWhat is the Seat Height?Tooltip content (17.44″)
    See image with dimensions
    WoodBridge-T-0001 dimensions
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top view of Woodbridge elongated toilet

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. Plus, the dual flush system only uses about 1.2 gallons per flush making this Woodbridge model very water efficient. It has been tested for water efficiency and found to comply with the strict EPA and CSA guidelines.

Furthermore, the toilet uses a siphoned flushing tube that reduces noise and helps prevent leaks, clogs, and other problems caused by waste. The seat is designed to have the optimal height for seating and standing and weighs the same as other similar models.

The toilet is made of vitreous china and comes with a pre-installed seat, a wax ring, bolts, and a very clear instruction booklet. Plus, the packaging contains a hand wrench for tightening the bolts and screws. 

Take a look at our full Woodbridge toilet review

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Performance Ratings

★  Easy to Clean – 5 out of 5
★  Easy to Install – 4 out of 5

* based on Amazon’s rating system

Additional Models

One-Piece Elongated 1.0/1.6 GPF Dual Flush (Model Being Reviewed)

T-0001-CH (White with chrome button)

T-0001-MB (White with matte black button)

T-0001-BN (White with brushed nickel button)

T-0001-BG (White with brushed gold button)

T-0001-ORB (White with oil rubbed bronze button)

Product Documentation

  • Spec Sheet (PDF)
  • Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.4 of 5 stars  – 24 Total Reviews

Read Reviews

5 stars - 17 reviews
4 stars - 3 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 3 reviews
Walmart Reviews Walmart Reviews
 5.0 of 5 stars  – 3 Total Reviews

Read Reviews

5 stars - 3 reviews
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Home Depot Reviews Home Depot Reviews
 4.9 of 5 stars  – 179 Total Reviews

Read Reviews

5 stars - 156 reviews
4 stars - 17 reviews
3 stars - 2 reviews
2 stars - 2 reviews
1 stars - 2 reviews
Positive Comments (sourced from reviews)
  • EPA WaterSense certified saves on water
  • Optimal seat height for extra comfort
  • All tools and a clear instruction booklet is included in the packaging
  • Easy to clean and install
Negative Comments (sourced from reviews)
  • Flush buttons tend to stick over time
  • Water line can be difficult to attach

Summary of Recent Reviews

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.

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5. Kohler Santa Rosa – Most Reviewed

Kohler 3810-0 Santa Rosa one-piece model

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  AquaPiston 360° Gravity FlushWhat is a AquaPiston 360° Gravity Flush?Flapper-less design using a canister. Water rotates 360 degree into the bowl, creating a powerful flush.
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (27.75″ x 18.75″ x 28.19″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.25″)
    See image with dimensions
    D:\Upwork\Ian\Kohler Santa Rosa dimensions

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Kohler 3810-0 Santa Rosa installed

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. 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.

This model is water efficient and 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.

Read our in-depth article on the Kohler Santa Rosa toilet

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Performance Ratings

★  Comfort – 4.8 out of 5
★  Easy to Clean – 4.7 out of 5
★  Easy to Install – 4.6 out of 5

* based on Amazon’s rating system

Seat Options

  • K-75796 Cachet® Nightlight Quiet-Close™ Elongated seat
  • K-8298 C³®-155 Elongated bidet seat

Product Documentation

  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.4 of 5 stars  – 357 Total Reviews

Read Reviews

5 stars - 249 reviews
4 stars - 41 reviews
3 stars - 19 reviews
2 stars - 15 reviews
1 stars - 33 reviews
Walmart Reviews Walmart Reviews
 3.3 of 5 stars  – 32 Total Reviews

Read Reviews

5 stars - 14 reviews
4 stars - 2 reviews
3 stars - 3 reviews
2 stars - 6 reviews
1 stars - 7 reviews
Home Depot Reviews Home Depot Reviews
 4.5 of 5 stars  – 2452 Total Reviews

Read Reviews

5 stars - 1714 reviews
4 stars - 441 reviews
3 stars - 123 reviews
2 stars - 73 reviews
1 stars - 101 reviews
Positive Comments (sourced from reviews)
  • Strong flush keeps bowl clean
  • Water-efficient systems reduces your water bill
  • Available in several colors including black
  • Durable design holds up over time
Negative Comments (sourced from reviews)
  • The flush system parts were reported to break after some time

Summary of Recent Reviews

“UPDATE AFTER 1 YEAR OF OWNERSHIP: STILL WORKS LIKE A CHAMP!” 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.

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6. TOTO Eco Ultramax – Runner Up

TOTO Eco Ultramax 1.28gpf toilet

Key Features
  •  Flushing Score:   500 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  E-Max FlushE-Max Flush ExplainedLarge 3” siphon valve and extra large siphon jet. Efficient use only 1.28 GPF. Powerful, but quiet flush.
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (28.25″ x 16.62″ x 27.16″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (15.7″)
    See image with dimensions
    TOTO MS854114EL#01 Eco Ultramax dimensions

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TOTO Eco Ultramax top view of toilet seat

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.

Further, the toilet has a sleek, and elegant design. It perfectly fits any modern bathroom, and due to its simplicity, it’s a good choice for older bathrooms as well.

The one-piece design significantly decreases any chance of leaks, and the sleek design ensures an easy-to-clean surface for the entire model.

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Seat Options

  • SS114 SoftClose seat

Product Documentation

  • Parts Manual (PDF)
  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.2 of 5 stars  – 90 Total Reviews

Read Reviews

5 stars - 67 reviews
4 stars - 7 reviews
3 stars - 3 reviews
2 stars - 1 review
1 stars - 12 reviews
Lowes Customer Reviews Lowes Customer Reviews
 4.5 of 5 stars  – 17 Total Reviews

Read Reviews

5 stars - 15 reviews
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 2 reviews
Home Depot Reviews Home Depot Reviews
 4.9 of 5 stars  – 25 Total Reviews

Read Reviews

5 stars - 21 reviews
4 stars - 4 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Positive Comments (sourced from reviews)
  • Sleek and elegant design for a modern look
  • Good price for a one-piece toilet
  • Water-efficient flush system
  • Comfort height adds a touch of elegance
Negative Comments (sourced from reviews)
  • Some installation parts were missing from packaging

Summary of Recent 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.

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7. TOTO Eco Soiree

Eco Soiree Elongated Toilet

Key Features
  •  Flushing Score:   600 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System: Dynamax Tornado FlushTOTO Tornado Flush TechnologyA flush with centrifugal and cyclonic action that rinses waste away efficiently and keeps bowl cleaner
  • Flush Type: Single
  • Style: One-Piece
  • Dimensions (sourced from manual): Toilet (28.13″ x 17.7″ x 27.75″), Rough-inWhat is a Rough-in?Measurement between center of waste pipe and wall (12″), TrapwayWhat is a Trapway?S-shaped curved channel inside the base of the toilet. Waste travels from the bowl through the trapway, then out the bottom of the toilet. (2.12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.37″)
    See image with dimensions
    TOTO MS964214CEFG#01 Eco Soiree dimensions

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TOTO MS964214CEFG#01 Eco Soiree flushing toilet

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

The trip lever has a chrome finish that prevents rusting, scratches, and scuff marks. Plus, the elongated front bowl is fitted with a Soft Close seat that quietly closes and opens.

The seat is designed at a height of 17-¼” making it optimal for short and tall individuals alike.

Finally, the porcelain is easy to clean and much more resistant to water and rust markings. Furthermore, this toilet is ADA certified, meaning it’ll be convenient to use even by those who have trouble sitting and standing easily.

You may be interested in our full TOTO Eco Soiree review

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Performance Ratings

★  Comfort – 5 out of 5
★  Easy to Clean – 4.5 out of 5
★  Easy to Install – 4.2 out of 5

* based on Amazon’s rating system

Seat Options

  • SS214 SoftClose seat

Product Documentation

  • Parts Manual (PDF)
  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 3.7 of 5 stars  – 62 Total Reviews

Read Reviews

5 stars - 37 reviews
4 stars - 9 reviews
3 stars - 7 reviews
2 stars - 3 reviews
1 stars - 4 reviews
Lowes Customer Reviews Lowes Customer Reviews
 4.3 of 5 stars  – 8 Total Reviews

Read Reviews

5 stars - 5 reviews
4 stars - 2 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 1 review
Walmart Reviews Walmart Reviews
 5.0 of 5 stars  – 1 Total Review

Read Reviews

5 stars - 1 review
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Positive Comments (sourced from reviews)
  • ADA certified for those with mobility challenges
  • Chrome plated lever for a nice finish
  • Uses minimal amount of water to flush
  • 17.37 inches universal height for added comfort
  • SoftClose seat eliminates lid slamming
Negative Comments (sourced from reviews)
  • The bottom drain is not symmetrical
  • Some customers have reported receiving toilets with a deformed bowl

Summary of Recent Reviews

Customers are happy with the flushing power of this toilet.  Some reviews stated that they had clogging issues with their previous toilet but replacing it with this one fixed that problem.  There is some mention of it being a little loud but most agree it's worth it for the flushing power.

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8. TOTO Ultramax 

TOTO Ultramax Elongated toilet

Key Features
  •  Flushing Score:   600 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.6 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  G-Max FlushWhat is a G-Max Flush?Larger flush valve. 3.25” valve vs. a standard 2.83” valve. Utilizes additional water jets.
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (28.12″ x 16.61″ x 27.16″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (15.7″)
    See image with dimensions
    TOTO MS854114S#01 Ultramax dimensions

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TOTO Ultramax one-piece unit

The TOTO Ultramax is a sleek and high-profile RV toilet with a commercial-grade flush system and a 3-inch wide flush valve. The trapway has been computer-designed and tested for super-efficient and clog-free use throughout the years.

This model is sold in 5 different finishes including the high-end CEFIONTECT ceramic finish. It is designed for households and RVs and is equipped to handle up to 3.8 gallons per flush without the water backing up. Read more about TOTO's CEFIONTECT ceramic finish.

Plus, its one-piece design will eliminate the need for frequent cleaning especially between the toilet bowl and the tank.

Customers have reported that this model works flawlessly with a strong flush and a standard noise level.

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Seat Options

  • SS114 SoftClose seat

Product Documentation

  • Parts Manual (PDF)
  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 3.7 of 5 stars  – 90 Total Reviews

Read Reviews

5 stars - 56 reviews
4 stars - 10 reviews
3 stars - 9 reviews
2 stars - 7 reviews
1 stars - 8 reviews
Lowes Customer Reviews Lowes Customer Reviews
 5.0 of 5 stars  – 5 Total Reviews

Read Reviews

5 stars - 5 reviews
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Home Depot Reviews Home Depot Reviews
 4.2 of 5 stars  – 36 Total Reviews

Read Reviews

5 stars - 27 reviews
4 stars - 2 reviews
3 stars - 0 reviews
2 stars - 1 review
1 stars - 6 reviews
Positive Comments (sourced from reviews)
  • Flush is quiet yet powerful
  • Easy to clean design
  • Available in several finishes to match your style
  • Made in the USA
Negative Comments (sourced from reviews)
  • The flapper and the handle are prone to breakages due to poor design
  • Migh be too small for some users

Summary of Recent Reviews

Overall, customers are satisifed with the effective flush of this toilet.  Installing this toilet eliminated clogging issues that various reviewers experienced with their previous toilet.  A handful of buyers had to contact customer service and were pleased with the support they received.

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9. Kohler Santa Rosa

Kohler Santa Rosa black

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  AquaPiston 360° Gravity FlushWhat is a AquaPiston 360° Gravity Flush?Flapper-less design using a canister. Water rotates 360 degree into the bowl, creating a powerful flush.
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (27.75″ x 18.75″ x 28.19″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.25″)
    See image with dimensions
    D:\Upwork\Ian\Kohler Santa Rosa dimensions

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Santa Rosa elongated vs round toilet seat

Although the Kohler Santa Rosa is not the most affordable, it offers some fantastic features. It includes a special seat that prevents unintentional banging and is compact and comfortable, making it an ideal choice for any bathroom. The toilet comes only in black, which is beautiful, though some might not like the lack of choice.

The installation is simple and includes the average 12-inch rough-in. Further, because of the one-piece design, this toilet is effortless to clean and maintain. Additionally, this toilet saves water—up to 16,000 gallons annually—due to its efficient flush technology.

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Performance Ratings

★  Easy to Clean – 3 out of 5
★  Easy to Install – 3 out of 5

* based on Amazon’s rating system

Seat Options

  • K-75796 Cachet® Nightlight Quiet-Close™ Elongated seat
  • K-8298 C³®-155 Elongated bidet seat

Product Documentation

  • Spec Sheet (PDF)
  • Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 3.5 of 5 stars  – 22 Total Reviews

Read Reviews

5 stars - 13 reviews
4 stars - 0 reviews
3 stars - 2 reviews
2 stars - 0 reviews
1 stars - 7 reviews
Home Depot Reviews Home Depot Reviews
 4.5 of 5 stars  – 2452 Total Reviews

Read Reviews

5 stars - 1714 reviews
4 stars - 441 reviews
3 stars - 123 reviews
2 stars - 73 reviews
1 stars - 101 reviews
Walmart Reviews Walmart Reviews
 3.3 of 5 stars  – 32 Total Reviews

Read Reviews

5 stars - 14 reviews
4 stars - 2 reviews
3 stars - 3 reviews
2 stars - 6 reviews
1 stars - 7 reviews
Positive Comments (sourced from reviews)
  • Flushing system conserves water 
  • Beautiful, modern design
  • Easy to maintain
  • Installation is straightforward
Negative Comments (sourced from reviews)
  • Comes only in black

Summary of Recent Reviews

Buyers like this stylish, powerful toilet.  The style is sleek and modern which buyers love.  While some experienced issues with the toilet shattering during shipping, they were able to quickly receive replacements.  "UPDATE: 2 years later. Still GREAT toilet."

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10. Kohler Kathryn

KOHLER K-3940-0 Kathryn one-piece model

Key Features
  •  Flushing Score:   1000 MaPWhat is MaP?Grams of waste removed in a single flush. Scale = 0 - 1000
  • Water Consumption: 1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flushing System:  AquaPiston 360° Gravity FlushWhat is a AquaPiston 360° Gravity Flush?Flapper-less design using a canister. Water rotates 360 degree into the bowl, creating a powerful flush.
  • Flush Type: Single
  • Dimensions (sourced from manual): Toilet (28″ x 17.5″ x 28.63″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (17.37″)
    See image with dimensions
    KOHLER K-3940-0 Kathryn dimensions

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The Kohler KOHLER K-3940-0 Kathryn Comfort Height toilet Kathryn features a very specific design, combining a classy 1930s style with modern and sleek lines. Its design makes it a great choice for any type of bathroom, from traditional to modern.

Additionally, this toilet is water-efficient and saves up to 15,000 gallons every 12 months. This water efficiency doesn't sacrifice performance, however. Instead, with its AquaPiston technology, the toilet delivers a fast and powerful flush even while consuming only 1.28 gallons of water.

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Seat Options

  • K-75796 Cachet® Nightlight Quiet-Close™ Elongated seat
  • K-4108 C³®-230 Elongated bidet toilet seat

Product Documentation

  • Spec Sheet (PDF)
  • Product Install Guide (PDF)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 4.6 of 5 stars  – 11 Total Reviews

Read Reviews

5 stars - 10 reviews
4 stars - 0 reviews
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 1 review
Home Depot Reviews Home Depot Reviews
 4.9 of 5 stars  – 7 Total Reviews

Read Reviews

5 stars - 6 reviews
4 stars - 1 review
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Walmart Reviews Walmart Reviews
 4.5 of 5 stars  – 2 Total Reviews

Read Reviews

5 stars - 1 review
4 stars - 1 review
3 stars - 0 reviews
2 stars - 0 reviews
1 stars - 0 reviews
Positive Comments (sourced from reviews)
  • AquaPiston flush technology
  • Comfort height is charge level for added comfort
  • Saves up to 16,500 gallons of water per year
  • Retro and modern design combined
Negative Comments (sourced from reviews)
  • Some parts are slightly weak

Summary of Recent 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.

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11. SaniCanada 942

SaniCanada 932 Elongated one-piece unit

Key Features
  • Water Consumption: 0.8/1.28 GPFGallons Per FlushEfficient toilets use 1.28 gallons per flush, saving 20% more water than 1.6 GPF toilets.
  • Bowl Shape: ElongatedShape ExplainedElongated bowls are oval shape and 2” inches wider than round bowls
  • Flush Type:  DualDual Flush ExplainedChoose between a low flow or full flush action, typically has a button
  • Style: One-Piece
  • Dimensions (sourced from manual): Toilet (27.5″ x 14.37″ x 30.31″), Rough-inWhat is a Rough-in??Measurement between center of waste pipe and wall (12″), Seat HeightWhat is the Seat Height?The measurement from the floor to the top of the toilet seat. Standard height toilets measure between 15 - 17 inches, while chair height toilets measure 17 inches or more. (16″)
    See image with dimensions
    SaniCanada 942 dimensions

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SaniCanada 932 installed Although this toilet might be slightly difficult to install on your own, it offers some great features.

To start, it 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.

Also, the unit comes with a 5-year warranty. In case of any malfunction, you can call their polite and professional team to help you out. 

Seat Options

  • SaniCanada #UFKJ201 Elongated toilet seat

Product Documentation

  • Spec Sheet (PDF)
  • Product Install Guide (JPG)
  • Manufacturer Product Listing

Customer Reviews

Last gathered: April 17, 2022

Amazon Customer Reviews
 3.0 of 5 stars  – 1 Total Review

Read Reviews

5 stars - 0 reviews
4 stars - 0 reviews
3 stars - 1 review
2 stars - 0 reviews
1 stars - 0 reviews
Positive Comments (sourced from reviews)
  • Made with high-quality materials
  • Sleek and modern design
  • Amazing customer support
Negative Comments (sourced from reviews)
  • Too complex for average DIY installation

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Choosing a One-Piece Toilet

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 form. 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. 

Advantages of One-Piece Toilets

Basically, two-piece toilets 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?

  • Easier to Clean

To start, with no crevices or joints, there is no place for dirt to build up on a one-piece toilet, which is a big upside. They are also much easier to maintain because they have a lower chance of breaking or leaking in particular

  • 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.

  • No Drill Holes to Support Water 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.

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

What Is the Best One-Piece Toilet on the Market?

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. 

Is a One-Piece Toilet Easy to Install?

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.

Is a One-Piece Toilet Completely Clean After Flushing?

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.

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