Best One-Piece Toilets (11 Popular Picks!) – Toiletable Reviewed

When it comes to toilets, neither one-piece nor two-piece units are perfect. So, clarify your needs before buying.

Two-piece toilets are usually cheaper and since the tank and bowl are separated, they are also easier to move. However, the joining area of the tank and bowl is ideal for bacteria and dirt and takes a lot of time to clean. It might also cause leaking over time.

One-piece models usually have a sleek, seamless design. They are simple to clean but weigh and cost more.

So, the choice will depend upon what you need in a toilet. Keep reading to find out more about the best one-piece toilets on the market.

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 single-piece units so popular? And what are the advantages of those toilets?

• Single Piece Toilets Are Easier to Clean

With no crevices or joints, there is no place for dirt to build up. This is the main upside of single-piece units. They are also much easier to maintain because they have a lower chance of breaking or causing leakage.

• Seamless Models Have Fewer Parts (Easier to Install)

One-piece models are often smaller, making them ideal for compact bathrooms. Plus, they have a sleeker design that fits well with modern bathrooms. 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.

We Compared For You!

The Top 11 Reviews

1. Woodbridge Elongated

Seat Height	17 inches
Consumption	1.28 GPF
Flushing System	Dual flush
Shape	Elongated
Material	Ceramic

The Woodbridge toilet has been reported by many customers to look luxurious 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 trap way 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 UPS 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 does not weigh much when compared to 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. 

2. TOTO Eco Soiree Elongated Toilet

Seat Height	17.25 inches
Consumption	1.28 GPF
Flushing System	Double Cyclone
Shape	Elongated
Material	Ceramic

TOTO toilets are designed with the Double Cyclone Flush System that uses a minimal amount of water yet cleans 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.

The porcelain is easy to clean and much more resistant to water and rust markings. Furthermore, this toilet is ADA certified.

3. KOHLER Santa Rosa Elongated Toilet

Seat Height	17 inches
Consumption	1.28 GPF
Flushing System	Dual flush
Shape	Elongated
Material	China

The Kohler Santa Rose 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 comfortable height seat that offers individuals chair-like seating. The seat and the lid are also included in the packaging as well as 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.

4. TOTO Ultramax Elongated

Seat Height	17 inches
Consumption	1.6 GPF
Flushing System	Commercial-grade
Shape	Elongated
Material	Vitreous China

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 trap way 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 equipped to handle up to 3.8 gallons per flush without the water backing up.

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 bearable noise level.

5. TOTO Neorest

Seat Height	17.25 inches
Consumption	0.8/1.0 GPF
Flushing System	Tornado Flush System
Shape	Elongated
Material	Ceramic with SanaGloss glaze

This 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 cyclone siphon system is water efficient using 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.

6. TOTO MS854114EL#01 Eco Ultramax

Seat Height	17 inches
Consumption	1.28 GPF
Flushing System	E-max
Shape	Elongated
Material	Vitreous China

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

Also, the toilet has a very nice, 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.

Its one-piece design makes it nearly impossible to experience leaks, and there is no place for dirt between the tank and the bowl.

7. Kohler K-5401-PA-0 Veil

Seat Height	17 inches
Consumption	0.8/1.28 GPF
Flushing Type	Dual-flush
Shape	Elongated
Material	Ceramic

The first thing most people notice about this toilet is the design. It’s so smooth, sleek, and elegant, that it looks almost futuristic. Additionally, it meets all the ADA code requirements and comes with an upgraded seat.

The flush is assisted with a special pump and consumes between 0.8 to 1.28 gallons per flush. Also, the unit is completely tankless and attaches to the main water supply line.

It is a bit pricey, but it comes with an LCD remote control, which allows you to adjust the temperature, pressure, and more.

8. Kohler 3810-7 Santa Rosa

Seat Height	17 inches
Consumption	1.6 GPF
Flushing System	AquaPiston Flush
Shape	Elongated
Material	Vitreous China

Although this unit is not the most affordable, it offers some fantastic features. It includes a special seat that prevents unintentional banging and it’s 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. Because of its one-piece design, it is effortless to clean and maintain. Additionally, this toilet saves water—up to 16,000 gallons annually—due to its efficient flush technology.

9. American Standard Champion 4

Seat Height	16.5 inches
Consumption	1.6 GPF
Flushing Type	Quiet flush
Shape	Elongated
Material	Vitreous China

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 a Watersense certificate and American Standard offers a 10-year limited warranty.

10. Kohler K-3940-0 Kathryn

Seat Height	17.5 inches
Consumption	1.28 GPF
Flushing System	Aqua Piston Flush
Shape	Elongated
Material	Ceramic

Kohler Kathryn features a very specific design. It has a classy 1930s style, yet it still has modern and sleek lines. Its design makes it a great choice for any type of bathroom, from traditional to modern.

Additionally, it’s water-efficient and saves up to 15,000 gallons every 12 months. Water-saving doesn’t sacrifice performance though. With its AquaPiston technology, the toilet delivers a fast and powerful flush, with only 1.28 gallons of water.

11. SaniCanada 932 Elongated

Seat Height	16.5 inches
Consumption	0.8/1.6 GPF
Flushing Type	Dual Flush
Shape	Elongated
Material	Ceramic

Although this toilet might be slightly difficult to install on your own, it offers some great features. It comes with a dual-flush system for either a 0.8 or 1.6-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.

Buyer’s Guide – 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 toilet like this for the first time. Let’s see what to check when buying a new one-piece toilet.

✓ Dimensions and Rough-in Requirement

Most toilets will be 12 inches apart from the wall, which is called a rough-in dimension. Be sure to measure before buying. It’s also important that the seat height 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 use 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, this leads to huge waste over time. Toilets usually account for 30 percent of water usage in an average household. Modern toilets use much less water while maintaining efficiency. Look for a model with a WaterSense label.

✓ 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.

✓ 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.

How to Install a One-Piece Toilet

Installing a toilet like this is actually very simple, but the process can vary between units.  

First, turn off the water supply and get rid of the old toilet. Remove it 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.

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 it’s not, simply rotate until it fits.

To lay down a new toilet, you should get someone to help you. If the bolts properly line up with the holes on the floor, bolt it down. You can do this 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 that, turn the water back on and you are finished. Your toilet is ready for use.

Unique Features

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 see what features they have to offer.

Design & Materials

Most one-piece models have a specific, sleek design which makes them ideal for small and compact bathrooms. They are comfortable and convenient, but they come in different heights. This is something you should consider when it comes to comfort.

The standard 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.

Toilets are usually made from porcelain or ceramic. You can even find plastic ones, but those are usually not very durable. If you find a model made from porcelain or ceramic, these units hardly ever leak and are a better choice overall.

Toilet Bowl Type

✓ Elongated 

Usually, oval bowls are better than round counterparts in every way. They provide more comfort and are usually a few times bigger. Also, they are ideal for children who are just learning to use an adult toilet.

✓ Round Bowl

Round bowls are usually 5-6 inches smaller than elongated ones, making them great for small bathrooms. On the other hand, they provide less comfort. When it comes to price, it’s similar between elongated and round units.

✓ ADA Compliant Bowl

Toilets with ADA-compliant bowls are usually around 2 inches smaller than the standard ones. It makes them comfortable and convenient. Also, these toilets are an ideal choice for people with disabilities.

Flush Types

1. Gravity Flush

Gravity flush is the most common flushing option. The weight of the water builds pressure, which then cleans the bowl. It’s also pretty quiet and requires very low maintenance.

2. Pressure Flush

These toilets usually have a special air tank which is under pressure. It creates a more powerful flush, but it’s also noisier. On the other hand, a pressure flush is much better at removing waste.

3. Dual-Flush

The main advantage of this type is its water-saving efficiency. You can choose a half-flush for liquid waste, and a full flush for solid waste. While protecting the environment, this also reduces monthly water bills.

Disadvantages

Of course, one-piece models have some disadvantages, too. First, they are quite expensive. 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.

Single-piece toilets are not ideal for tall persons. They usually have seats with lower height, which can be considered a disadvantage. However, if you buy a wall-mount toilet, you can place it a few inches higher.

In the end, the main downside of one-piece units is their weight. They are usually quite heavy, which might be a problem during the installation. We strongly advise you to call a professional to install it. The fact is, a single one-piece toilet can weigh up to 100 kilograms, which is just too much.

Frequently Asked Questions