Best One-Piece Toilet (11 Popular Picks!) Reviews in 2021 by Toiletable

When it comes to toilets, neither a one-piece or two-piece unit is necessarily better than the other. Instead, the right option for you will depend on your specific needs. 

To compare both options, two-piece toilets are usually cheaper easier to move as since the tank and bowl can be separated. However, the joining area of the tank and bowl is ideal for bacteria and dirt development and takes longer to clean. The separate parts may also cause leaking over time.

By comparison, one-piece toilet models usually have a sleek, seamless design. They are simpler to clean but weigh and cost more.

Ultimately, the choice will depend upon what you need in a toilet. If you believe a one-piece toilet is what you’re looking for, keep reading to find out more about the best one-piece toilets on the market.

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.

#1. 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 while also coming 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.

#2. 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 which 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.

#3. Bowl Shape Considerations

There are a couple different types of toilet bowl 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.

Comparison Table

One-Piece Toilets – 11 Sleek Reviews

1. 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 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 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

2. TOTO Eco Soiree Elongated 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

3. KOHLER Santa Rosa Elongated Toilet

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 

4. TOTO Ultramax Elongated

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 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.

5. TOTO Neorest

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.

6. TOTO Eco Ultramax

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.

7. Kohler K-5401-PA-0 Veil

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 on the Kohler Veil is assisted with a special pump so it consumes only 0.8 to 1.28 gallons per flush. Also, the unit is completely tankless and attaches to the main water supply line.

While this option is a bit pricey, it comes with an LCD remote control, which allows you to adjust the temperature, pressure, and more. You can fully customize your experience while saving water and upgrading your bathroom’s look when using this toilet.

You may be interested in our review of different Kohler toilets.

8. Kohler Santa Rosa

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.

9. American Standard Champion 4

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

10. Kohler Kathryn

The Kohler 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.

11. SaniCanada 932 Elongated

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 1.6-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. 

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:

#1. 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.

#2. 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.

#3. 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 

#4. 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.

Installing 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