11 Best One Piece Toilets in 2021 – Latest List and Buyer’s Guide

When it comes to toilets, neither one-piece nor two-piece units are perfect. When buying a new toilet, you should first clarify your needs. For example, two-piece toilets are usually cheaper and more popular. Also, since the tank and bowl are separated, two-piece toilets are 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.

On the other hand, one-piece toilets usually have a sleek, seamless design. They are simple to clean but weigh and cost more. So, the choice depends mainly upon what you need in a toilet.

11 Best One Piece Toilets: Comparison Table

Title:

WoodBridge T-0001

Best Seller

Kohler 3810-0 Santa Rosa

GALBA Small Toilet

Photo:

Material:

Ceramic

China

Ceramic

Water Consumption:

1.0/1.6 GPF

1.28 GPF

0.8/1.6 GPF

Seat Height:

17 inches

17 inches

16.5 inches

Prime?

-

-

-

Rating:

Check Price

Check Price

Check Price

Title:

WoodBridge T-0001

Photo:

Material:

Ceramic

Water Consumption:

1.0/1.6 GPF

Seat Height:

17 inches

Prime?

-

Rating:

Check Price

Best Seller

Title:

Kohler 3810-0 Santa Rosa

Photo:

Material:

China

Water Consumption:

1.28 GPF

Seat Height:

17 inches

Prime?

-

Rating:

Check Price

Title:

GALBA Small Toilet

Photo:

Material:

Ceramic

Water Consumption:

0.8/1.6 GPF

Seat Height:

16.5 inches

Prime?

-

Rating:

Check Price

Top 11 Best One Piece Toilets: Reviews

1. Woodbridge Elongated

The Woodbridge toilet has been reported by many customers to look really 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.

Moreover, the skirted trap way creates a flawless look and enables easy cleaning plus the dual flush system only uses about 1.2 gallons of water per flush making this Woodbridge model very water efficient.

Furthermore, the toilet uses a siphoned flushing tube that reduces the noise and helps prevent leaks, clogs and other problems caused by waste. The seat is designed to have an optimal height for seating and standing and does not weigh much when compared to other similar models.

The toilet is made using vitreous china and comes with a pre-installed seat, wax ring, bolts, and a very clear instruction booklet. Plus, the packaging contains a hand wrench for tightening the bolts and screws. Also, the toilet has been tested for water efficiency and found to comply with the strict UPS and CSA guidelines.

2. TOTO Eco Soiree Elongated One-Piece Toilet

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 scuffs marks plus the elongated front bowl is fitted with a Soft Close seat that quietly closes and opens.

Moreover, the seat is designed to be at a height of 17 ¼ inches making it optimal for short and tall individuals alike.

Plus, the porcelain is easy to clean and much more resistant to water and rust markings.

Furthermore, this toilet has been tested and ADA certified.

3. KOHLER Santa Rosa Elongated Toilet

Kohler Santa Rose Elongated Toilet is designed with an integrated bowl and tank for seamless and easy to clean design without any crevices, hooks or corners.

It is made with a comfortable height seat that offers individuals chair-height seating that will suit everybody. 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.

Moreover, it is very water efficient and the canister flush packs a strong water push to eliminate any possible clogs due to waste, paper, or other waste. 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

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.

Moreover, this model is sold in 5 different finishes including the high-end CEFIONTECT ceramic finish. It is designed for households and RV equipped to handle up to 3.8 gallons of water per flush without the water backing up.

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

Customers have reported this model to work flawlessly with a strong flush and bearable noise level.

5. TOTO Neorest Dual Flush Toilet

The sleek and beautiful one-piece design of ceramic toilet manufactured by TOTO, plus you can choose from 6 different colors. Moreover, the skirted design and high profile tank make cleaning easy while the non-stick finish practically eliminates hard waste from 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 gallons per flush thereby saving you lots on water bills.

Also, you can control the flushing using the battery operated remote control as well as set the seat temperature. This option comes in handy during the winter months when the temperatures outside drop significantly. Moreover, this TOTO model comes with gentle water spray that has pulsating and oscillating features.

6. TOTO MS854114EL#01 Eco Ultramax

Made by famous TOTO, this toilet is an excellent choice for just anybody. At first, it consumes only 1.28 gallons of water per flush. Thanks to its E-max system, it will save you money on bills each month.

Also, the toilet has a very nice, sleek, and elegant design. It perfectly fits any modern bathroom, but due to its simplicity, it’s a good choice for older bathrooms, too. Another nice feature of this toilet is related to its one-piece design. It’s almost impossible to experience leaks, and there is no place for dirt between the tank and the bowl.

7. Kohler K-5401-PA-0 Veil

The first thing that you simply have to notice is the design of this toilet. 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 water temperature, pressure, and similar.

8. Kohler 3810-7 Santa Rosa

Although this unit is not the most affordable in the market, it offers some fantastic features. For example, it features a special seat that prevents unintentional bashing. Also, it’s compact and comfortable, making it an ideal choice for any bathroom. The toilet comes only in black color, which is beautiful. However, it might be a lack of choice for some people.

The installation is pretty simple and includes the average 12-inch rough-in. Due to its one-piece design, it is effortless to clean and maintain. On top of that, the toilet saves water – up to 16,000 gallons annually, due to its efficient flush technology.

9. American Standard Champion 4

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. The toilet also features a “right height” of 16.5 inches, to ensure maximum comfort.

Additionally, the unit comes with an ever clean surface which stays clean longer than most units. Like most toilets in this price range, it features a slow-close seat. Also, it comes with a Watersense certificate and American Standard offers 10-year limited warranty.

10. Kohler K-3940-0 Kathryn

Kohler Kathryn features a very specific design. Somehow, it looks like the 1930s toilet, but it still has modern and sleek lines. Its design makes them great for any type of bathroom, from old to modern ones.

Additionally, it’s water-efficient and saves up to 15,000 gallons of water every 12 months. On top of that, water-saving literally sacrifices no performance. Also, with its AquaPiston technology, the toilet delivers a fast and powerful flush, with only 1.28 gallons of water.

11. SaniCanada 932 Elongated One Piece Toilet

Although this toilet might be slightly difficult to install on your own, it offers some great features. For example, it comes with dual-flush system which saves lots of water annually. There are two buttons on the top, for 0.8 or 1.6-gallon flush.

Additionally, the toilet requires almost no maintenance. Due to its design, you can clean it in a matter of minutes. Also, the unit comes with a 5-year warranty, and in case of any malfunction, you can call their polite and professional team to help you out.

Buyer’s Guide: How to Choose the Best 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 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

Since every toilet has a different size, it’s the first thing that you should consider. Especially if you have a compact bathroom. Most toilets will be 12 inches apart from the wall, which is called a rough-in dimension. Finally, the seat height is important to make sure that it will fit every member of the family.

Water Efficiency

Water-efficiency has two advantages. It saves your 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, while maintaining a powerful flushing. 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, it leads to huge water waste over time. Toilets usually account for 30 percent of water usage in an average household, which is too much. Modern toilets use much less water while maintaining efficiency. You should buy a toilet 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 that you would have to clean. You will especially notice the difference if you’ve ever tried to clean a two-piece toilet. Also, the chance of leaking is literally zero, since the bowl and the tank are actually one piece.

Highly Durable

Any type of equipment, including toilets, is more durable if it has fewer parts. Additionally, a two-piece toilet has a rubber gasket which can cause leaking over time.

The technology of the toilet can directly affect its durability. For example, a toilet can have a self-cleaning action that keeps the bowl clean for longer. Also, it means that you will have to clean the bowl less often, which is excellent in the long run.

Advantages of One-Piece Toilets

Basically, two-piece toilets have the same features as one-piece counterparts. On top of that, they cost much less. So, why are single-piece units so popular? And what are the advantages of those toilets?

At first, one-piece toilets are easier to clean. No crevices or joints, and therefore, no place for dirt to build up. It’s basically the main upside of single-piece units. They are also much easier to maintain since they have a lower chance of breaking or causing leakages.

One-piece toilets have fewer parts, which makes them easier to install. They feature a smaller size, making them ideal for compact bathrooms. Also, they have a sleeker design, but it’s completely up to you. In the end, two-piece units are shipped separately. One-piece toilets come as a whole unit, which prevents possible problems with shipping.

To install a casual two-piece toilet, you would have to drill holes to support the water tank. However, you won’t have that problem with single-piece models. Also, their sleek profile perfectly fits any modern bathroom, while saving space.

How to Install a One-Piece Toilet

Installing a one-piece toilet is actually very simple, but the process might vary between units. Obviously, you should first 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.

You need to 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 wax ring. However, the floors might not be perfectly even. If that happens, you will need to buy a different wax ring. Stick the wax ring to the toilet to make sure it’s centered properly. If it’s not, simply rotate it until it fits.

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

Unique Features of Top One-Piece Toilets

Obviously, 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 toilets have a specific, sleek design. It makes them ideal for small and compact bathrooms. They are comfortable and convenient, but they come in different heights. Obviously, height 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. It provides nice support to both knees and ankles.

Toilets are usually made from porcelain or ceramic. You can even find the plastic ones, but those are usually not much durable. One-piece units never leak, and if you find a model made from porcelain or ceramic, it’ll be an excellent choice.

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 the 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

Gravity Flush

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

Pressure Flush

Those 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, pressure flush is much better at removing waste.

Dual-Flush

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

Disadvantages of Having a One-Piece Toilet

Of course, one-piece toilets have some disadvantages, too. At first, they are quite expensive. If you buy a cheaper model, it can be a risk, since they are made of low-quality materials. Also, if the one-piece toilet bowl breaks, there are no replacements. In that case, you need to buy a completely new toilet.

One-piece toilets are not ideal for tall persons. They usually have seats with low 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 toilets is their weight. They are usually quite heavy, which might be a problem during the installation. Also, if you have issues with your back, 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

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

Obviously, the best one-piece toilet should be affordable. Also, it’s pretty nice if it features a dual-flush option. Among the many brands that we tested, TOTO seems to be the market leader. Their toilets are also among the most comfortable.

How One-Piece Toilets Differ From Two-Piece Counterparts?

At first, one-piece toilets don’t have any space between the parts of the toilet. It prevents the dirt and debris from buildup. Also, they are usually low profile and have a seat with a low height.

Is the 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.

How Much Does a One-Piece Toilet Cost?

The price of one-piece toilets can vary between models. For example, you might find a toilet for $100, and you might find a unit for over $1000. It directly affects the quality, durability, and comfort of the unit.

How Much Water Does a One-Piece Toilet Save?

One-piece toilets use much less water than standard units. It saves the environment, but it also reduces your monthly water bills.

Is a One-Piece Toilet Completely Clean After Flushing?

Yes! They use less water, but also, they have specific flushing mechanisms. They allow one-piece toilets to be completely clean, with less water involved.