Home » Differences between One Piece Toilets Vs Two Piece Toilets

Differences between One Piece Toilets Vs Two Piece Toilets

Top rated toilets can be classified into one-piece and two-piece toilets. Both these toilets have the general function of flushing out waste. But, what are their differences? If you’re in the same boat as other homeowners figuring out which toilet suits their needs and preferences, keep reading this post.

A toilet is made of three parts – the tank, the pedestal and the bowl.

The pedestal provides the toilet its distinct height, while the bowl is what flushes out the waste to the drainpipe line.

Finally, the tank functions to store water, and then provide the required pressure, flushing out the waste from the toilet.

So what is a one-piece toilet? It is also called a single-piece toilet wherein the tank and the toilet is as one or fused together.

On the other hand, the toilet will be called a two-piece toilet or coupled toilets have the toilet and tank separated. They are joined by fittings.

In the following are the differences between one-piece and two-piece toilets.

Top Rated Toilets: One-Piece vs. Two-Piece Toilets Differences

What makes the one-piece and two-piece toilets different? While both of them have the same basic functions, they also have differences in some aspects, including in weight and maintenance. To learn more, let’s discuss in the following.

Efficiency and flushing power

From flappers to towers, both the toilet types offer different flushing technologies. You can also find both in a low flow version that makes use of less water per flush.

Resale value

You cannot improve your home’s resale value with any of the toilet types, but a good functioning toilet is what can maintain your home’s value, regardless you have the one-piece or two-piece toilet.

Weight and size

Single and coupled toilets are in a wide range of sizes. One-piece toilets will take up less space because of its design that has its tank and bowl molded together. In this case, they don’t need much space overall.

But then, many one-piece toilets cater to height guidelines. Usually, its bowl is sitting at 17 inches. But then, two-piece toilets are available in comfort and standard heights.

Both toilets are also available in sizes accommodating different bathroom designs.

Many toilets are sitting at 12 inches, although some having a rough in between 10 and 14 inches.

On the other hand, coupled toilets are available in different options for sitting on a rough with a different size because its bowl size is the same. You can just order a tank to sit on its top.

However, there are single-piece toilets that can have moveable rough, which can suit a wide range of bathrooms. For this reasons, you will have a wider range of choices with a two-piece if you have an irregularly sized rough.

In addition, one-piece toilets are heavier because a coupled toilet can be uncoupled to move dividing its weight. On the other hand, the one-piece has all the things molded into one. For this reason, you might find it hard moving a one-piece.

Regarding size, both have almost the same size. If you’re going to look at the transportation option, though, you can find the coupled toilets easier because you can have the toilet and the tank transported separately. Both the type of toilets is about 400 mm in height.

Design and aesthetics

In terms of designs, there are many of them available in both the toilet types. You can choose from a wide range of designs from any of them. But when you compare the two, you can notice that the single-piece toilets have a more pleasing design because it has no gap between the body and the tank.


A toilet’s functionality isn’t dependent on the model but on the mechanism used in flushing and the toilet’s design.

So when comparing this aspect, there is not much difference between the coupled and single-piece toilets.


If you’d look into the performance of both the top rated toilets, you will find little to no difference between the two.

They can offer the same efficiency and flushing. They also have almost the same parts, specifications and features if they’re manufactured by the same brand.


There are no joining parts to maintain for one-piece toilets because they’re a large piece of porcelain. As there is a fewer parts, it is more reliable, too.

It also means that the one-piece toilet is a breeze to maintain. You can also have peace of mind that you don’t need to deal with leaking water coming from the tank.

For the coupled toilets, you should mind for leaks especially when the rubber gasket sealing the tank is damaged.

But under maintenance and care, both the toilets can last a long time. As one-piece toilets don’t have joining parts, you also don’t have to worry for leaks.


There are fewer fittings in a one-piece toilet, so it requires less maintenance. In the case of two-piece toilets, there can be issues in the joint and tank areas. When it comes to cleaning, the single toilet can be easier to clean because it has no gap and joint in the design unlike with the two-piece toilets.

Final Thoughts

There you have what to know about the differences between one-piece and two-piece top rated toilets. If you’re in the middle of deciding which to buy for your bathroom, compare and consider the factors, including maintenance, size, weight and functionality, to name some. Finally, refer to this post for guidance today!

Leave a Comment