One Piece toilets VS Two Pieces toilets: Which Type of Toilet Should you Choose?



Purchasing a new best toilet type can be confusing especially if you need to make a choice between the best one piece toilet and the best two piece toilets.

A lot of people are trying to understand the difference between the one piece toilet and two piece toilet, and this can make the choosing of the best toilet really difficult.

Basically, one piece toilets have their tanks and the bowl fused together, this makes up the whole toilet system. The two piece toilet has the bowl and tank separated and they are connected with a pipe.

The most popular options are the two piece toilets, this is because, this is the way toilets have been made over the years, this makes a lot of people very used to them as they can be found in almost every home.

Both the one piece toilet and the two piece toilet have their own good side and bad side. When youread through this article, you will be able to make a great selection from either the one piece toilet or the two piece toilet.

Difference between the one piece toilets and two piece toilets – One piece toilets vs two piece toilets

This section of the article will elaborate more on the distinctions between the two types of toilets based on their features and functionality.

What is a water closet toilet?

A water closet is the toilet that operates on the principle of flushing out the human waste using water to a reserve pit or soak away.

A water closet consist of three parts, they are bowl, pedestal and a tank. Pedestal of the toilet is to give the required height for the toilet.

Bowl in the toilet is designed to collect the waste and flush out the waste to the drain pipe line. Tank is to store the water and provide required pressure to flush out the waste from toilet.

What is a one piece toilet?

A one piece toilet is one in which the tank is fused to the bowl without any visible connection or joint to the toilet bowl, it is also referred to as the single piece toilet.

If the toilet and tank is fused together without any joints then the toilet is known as one piece toilet. It is also known as single piece toilet.

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What is a two piece toilet?

A two piece toilet is one in which the tank is fused to the toilet bowl using a physical connection, fittings or joint, it is also referred to as the couplet piece toilet.

If the toilet and tank are separate and joined using fittings then it is known as two piece toilet. it is also called as coupled toilets.

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Comparison between the one piece toilets and two piece toilets – One piece toilets vs two piece toilets

One Piece toilets VS Two Pieces toilets : What is the difference?

One Piece toilets VS Two Pieces toilets : What is the difference?

This will help to draw a better comparison between the one piece toilets and two piece toilets based on different factors:

  • Price
  • Design availability
  • Aesthetic Look
  • Weight
  • Mounting Options
  • Size
  • Functionality
  • Installation
  • Maintenance
  • Other Points

Price difference between one piece toilets and two piece toilets:

The price of the toilet should be the first thing you want to look out for. The one piece toilet tends to be more expensive when compared to the two piece toilet.

It is actually more difficult, production wise to assemble the one piece toilets than when producing the two piece toilets and this definitely will reflect on their prices.

So the cost of one piece toilet is double than a two piece toilet. The winner is two piece toilet, because it is CHEAPER to buy.

Design availability between one piece toilets and two piece toilets:

Basically, the one piece toilets and two piece toilets always look very similar, the only difference is in the fact that they are jointed or disjointed, so there is not much of a difference in the designs of the models.

Aesthetic Look of one piece toilets and two piece toilets

If you are after the beauty and the aesthetic quality of one piece toilets and two piece toilets, the one piece toilets is the clear winner because it is made without any joint or gap between tank and body.

Weight difference one piece toilets and two piece toilets:

One piece toilets are designed to withhold the ceramic tank during firing cycle in production cycle so in design itself the products are higher in weight.

Normally the weight of a single piece toilet is around 40 Kgs (88 Pounds). A two piece toilet weight is around 25Kgs (55 Pounds). So with solid mass the winner is one piece toilet when comparing weight.

Mounting Options of one piece toilets and two piece toilets

The one pice toilet has more weight than the two piece toilets as we have seen already, this makes it almost impossible to hang it from the wall.

For two piece toilets, you can get a wall mount and a floor mount model, but for one piece only floor models will be available.

So if you are looking for a wall hung model then you have to go for two piece toilet.

Size difference one piece toilets and two piece toilets

The difference in size between the one piece toilets and two piece toilets are negligible, they are almost the same size.

But if you look at transportation option then two piece can be easier because you can get toilet and tank separately. Height of the both toilets are around 400 MM (15.7 Inch).

Functionality between one piece toilets and two piece toilets

The basic function ability between the one piece toilets and two piece toilets relies mostly on the toilet model and the manufacturers specifications.

It may be dependent on the flushing mechanism and design of the toilets. So the one piece and two piece toilet are getting equal points in this comparison.

Installation between one piece toilets and two piece toilets

In looking at the installation difference between the one piece toilets and two piece toilets, we have to look at them from two perspectives.

1. Installing the one piece toilets and two piece toilets

If you are considering the installation of toilet fittings and parts, then the one piece toilet is way easier to install than the two piece toilet seeing that the tank and bowl are fitted together already.

Two piece toilet fitting is not much easier as one piece toilet because tank and toilet fitting need to be done carefully to avoid water leakage and proper flush functioning.

2. Moving the one piece toilets and two piece toilets

Moving the one piece toilet can be very bulky and stressful as the parts are joined together and thus it has a higher weight.

You can move the two piece toilet easily by just disassembling the bowl from the tank and fixing them back together at your final destination.

Maintenance difference one piece toilets and two piece toilets

The one piece toilet is easier to maintain due to lesser fittings and joints. The two piece toilets requires more maintenance as it has a separate tank and bowl with jointed areas.

It is also very easy to clean the one piece toilets as there are no gaps or joints in the design, but cleaning the two piece toilets is stressful due to the jointed areas.

The tank attaches to a two-piece toilet at the bowl, and dirt and bacteria can build up in this area, making it hard to clean without disassembling the toilet.

Advantages and pros of the One Piece Toilets

  • Great aesthetics. Good match for a contemporary bathroom design in every modern home.
  • Easy to clean and up keep. More hygienic with no joining parts for dirt and bacteria to hide.
  • No worry of water leaking out of the tank and flooding the floor.
  • More durable due to no joining part to maintain.
  • More compact in size. A space saving toilet for small bathrooms.

Disadvantages and cons of the One Piece Toilet

  • Cannot replace toilet tank or bowl separately. Once you break the porcelain, you need a new replacement for the whole toilet.
  • Heavy and bulky to install. But when secured to the toilet flange, the job is 90% done. So in this regard, it may also deem as an advantage to some people.
  • Higher price.

Advantages and pros of the Two Piece Toilet

  • The tank and bowl can be installed separately, so it is less bulky and lighter to handle.
  • The toilet tank and bowl can be replaced individually.
  • Cheaper than the one-piece toilet.

Disadvantages and cons of the Two Piece Toilet

  • Need to clean the area where the tank joins to the bowl. And it’s difficult to thoroughly clean the joining area without removing the tank.
  • Joining area attracts dirt, grime and bacteria.
  • Water will leak out of the tank when the rubber seal starts to deteriorate.
  • Not as sleek looking as the one-piece model.

More information on the one piece toilets and two piece toilets

There are more information on the one piece and Two Piece Toilet that you may also factor in and consider during purchase:

  • Both the toilets can be available in ‘P’ Trap and ‘S’ Trap.
  • The color of the toilets will depend on the manufacturer and models, normally one piece and two piece toilets are available in white and ivory color. If you are looking for double color and different colors you have to look for china made toilets.
  • Both the toilets you can get seat cover as soft close seat cover as well as hard close seat cover.

Conclusion on one piece and Two Piece Toilet

When comparing difference between the one piece toilet and two piece toilet more points favors to the one piece toilet. So if you are OK to spend little more money than definitely go for one piece toilet.

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