One-Piece vs. Two-Piece Toilet Comparision with Pros & Cons

One-Piece vs. Two-Piece Toilet

When it’s time for a new bathroom toilet, one of the most significant decisions you’ll make is about one- and two-piece toilets. Two-piece toilets are what you traditionally think of when bathrooms come to mind. These toilets have a tank attached above the toilet bowl. One-piece toilets feature a tank that builds into the bowl assembly.


One-piece toilets are generally smaller than two-piece units. The tank of an integrated one-piece toilet takes up less space than the tank in a two-piece model so that a one-piece toilet can fit into a smaller area. One-piece units also typically have a smaller two-piece-sanitary profile. Both one and two-piece models can come in either regular or long glass shapes.


Two-piece toilets are generally more expensive than one-piece styles because flushing a singular toilet piece is more complicated than making the separate tank and bowl parts in two-piece toilets. Standard two-piece units can sometimes be found for less than $ 100, while a toilet piece can start in the $ 500 range as of July 2011.


For several reasons, two-piece toilets are more accessible to maintain than one-piece toilets. Due to their water tanks connected directly to the bowl, one-piece toilets can be challenging to work with, especially when tank accessories need maintenance. Two-piece toilets, on the other hand, are relatively easy to disassemble and access. Additionally, many manufacturers produce generic parts that we can use in most two-piece toilets. On some one-piece units, we can use only the manufacturer’s parts.


Installing a one-piece toilet is faster than with a tank and bowl combination because fewer components are to worry about. We must first install the container on the floor flange before the tank is installed and connected with a two-piece configuration. One-piece toilets are lowered onto the rim, connected, and are then ready for service.

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Pros of One-Piece Toilets

Because one-piece toilets are precisely cast as a one-piece, they offer several advantages over their two-piece counterparts. A one-piece toilet has no cracks between the tank and the seat, making cleaning much easier to accomplish. Because the tank does not have to be fixed, the installation is simpler as well. Once the toilet is in your bathroom, the installation is complete: no nuts or bolts are required.

One-Piece vs. Two-Piece Toilet

Cons of One Piece Toilets

A one-piece toilet can be uncomfortable at first, especially compared to a two-piece model. The more incredible difficulty in a casting bath as a single piece leads to higher manufacturing costs. Because this cost is reflected in the purchase price, a single piece will leave a bigger hole in your pocket than a two-piece dresser. And because the entire bathroom must be transported at once, rather than one piece at a time, installation can be more difficult. The time may be shorter, but the lift will be twice as tough.

Pros of Two-Piece Toilets

Two-piece toilets have some advantages over their more modern counterparts. The one important distinction is, curiously, performance. Some two-piece toilets function better than the one-piece variety among the models that feature a gravity-based washing mechanism. Because the tank tends to sit more than a one-piece toilet, the water has a greater distance to fall, creating a more powerful flush.

One-Piece vs. Two-Piece Toilet

Cons of Two-Piece Toilets

Two-piece toilets have a significant flaw — the tendency to leak. Because each bathroom has a crack at the bottom of the tank, it is easy for the water to seep and form an unsanitary puddle on the floor. One-piece toilets lack this flaw, proving the most significant difference between the two types: A two-piece vanity is better up front, but the one-piece variety may be the better option in the long run.

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