How to choose the best toilet for you? 1 piece vs 2 piece Toilet

How to choose the best toilet for you? 1 piece vs 2 piece Toilet

January 11, 2022

One of the most needed appliances in the home is the toilet, and at first glance, it does not seem that many options exist. However, in recent years, the 1 piece toilet is becoming more popular. Whether to choose this 1 piece toilet or the 2 piece toilet is a matter of personal taste. In the sections below, we will assist you with this choice.
                               one piece toilet                                                                            two piece toilet

We like                                                          We don’t like       
                    We like                                                   We don’t like

  1. Sleeker design                                                           1. Heavy                                                 1. Less expensive                                                       1. Harder to clean     
  2. Easier to clean                                                           2. Fewer rough-in options                       2. More options for height, style, and rough               2. More likely to break and leak
  3. May be more compact in height                                 3. More expensive                                  3. Easier to maneuver pieces for install                      3. More time-consuming installation
  4. More durable, less likely to break or leak                  4. More difficult to ship                            4. Flushing and water saving options                          4. May be taller or less compact
  5. Faster installation                                                      5. Mix and match tank and bowl
  6. More likely to sit at comfort height                             6. Easier to ship
  7. Flushing and water saving options

Basic Information

Let me take your on a crash course: Toilet Language
So the toilet has three main components:
  • Bowl - designed to catch all your waste and swallow it into sewer oblivion! 
  • Pedestal - the part that provides the lift up from the ground (holds the toilet bowl) 
  • Tank - The container at the back which stores water for flushing and gives the bowl pressure to flush waste away 
1 piece toilet: If the toilet and tank are fused together without any joints then the toilet is known as a one piece toilet - also known as single piece toilet.
2 piece toilet: If the toilet and tank are separate and joined using fittings then it is known as two piece toilet - also known as coupled toilets.


Size and Weight

Both 1 piece and 2 piece toilets come in a range of sizes. Traditionally, most 1 piece toilets take up slightly less space due to the way they are designed. The tank and bowl are molded together so that they don’t need as much room, front to back or in height.
However, most 1 piece toilets are designed to comfort height guidelines, which means that the bowl sits at 17 inches, rather than 15. 2 piece toilets can be found in both standard and comfort height, and both toilets are available in sizes to accommodate various bathroom designs.
When choosing a toilet, the most important measurement is the rough in, which is the distance from the center of the drain pipe to the wall behind the toilet. Most toilets sit at 12 inches, but some have a 10- or a 14-inch rough. 2 piece toilets have more options for sitting on a differently sized rough because the bowl size doesn’t change. Simply order a different tank to sit on top. A few one-piece toilets offer the ability to have a moveable rough to accommodate different bathrooms. So, if you have an odd-sized rough, you have more options with a two-piece.
1 piece toilets are considerably heavier. This is because a two-piece can be uncoupled to move, halving its weight, while a one-piece contains everything in one mold. Moving it can be more difficult, and shipping costs may be considerably higher.


Installation is fairly similar for both types of toilets regarding difficulty. A 2 piece toilet is going to be easier to move and maneuver, but it needs to be bolted together. A 1 piece toilet is harder to move but doesn’t need to be assembled.
In both cases, to install the toilet, a wax ring is placed over the waste pipe. The toilet is set on top of the ring at a slight angle then twisted sharply to face front. The installer sits on the toilet and leans front to back and side to side to evenly distribute the weight. The toilet is then bolted to the floor, and the bolts are concealed either in the toilet skirt or with bolt caps.
The water line is hooked up to the bottom of the tank and sealed. The water is turned on, and the toilet is allowed to fill before being flushed to check for leaks. This takes less than an hour.


                                                                                                         Comparison of Price between single piece and two piece toilet
YES, price is crucial and an extremely important factor, especially when you can spare an extra one to two hundred dollars for a quality product or a flawed product.
Single piece toilets are generally more expensive than 2 piece toilets due to the production process.
To put it simply, a 1 piece toilet is made of several small pieces. Firing and assembling all the elements into one takes skill. Until the producers can start using 3D printers for manufacturing, it is more likely that we will see 1 piece toilets being higher in price.


One of the reasons for the popularity of 1 piece toilets is the lower maintenance. The molded shape of the toilet makes a one-piece easier to clean because there is less space for bacteria to become trapped and breed.



1 piece toilets have a slight advantage regarding durability. The coupling between the tank and bowl of a 2 piece toilet may crack over time. This means that the two areas could uncouple, requiring replacing one or both pieces. In very old toilets, the rubber gasket between the two sections may degrade, which can cause leaks. This is an easy and inexpensive fix, however.
1 piece toilets are molded, so there is less chance of breakage between the couplings. However, if the china cracks in the tank section of the toilet, replacing the entire toilet is necessary. If the china cracks on a 2 piece toilet, you can easily replace the cracked section. Replacing internal parts for either toilet is the same, and the seat can be easily removed and replaced on either type of toilet. 
With proper care, either toilet can last 50 or more years without requiring replacement.

Flushing Power and Efficiency

Both 1 piece and 2 piece toilets are available in a wide range of different flushing technology, from flappers to towers. Both are also available in low-flow versions, which use as little as one gallon of water per flush.

Cleaning & Maintaining

The 1 piece toilet wins this round. Why?
The reason is a 1 piece toilet does not have a gap between the tank and the bowl, which can be almost unreachable and thus grow bacteria and germs.
Both types of toilets are comparable in terms of service life and functionality.
Maintenance wise, there are two aspect to this question:
  • Short term
  • Long term
Short term: the joint between the tank and the bowl of a 2 piece toilet might wear off.
Long term: It’s more affordable to find replacement parts for the 2 piece toilet, because each part is sold separately, which means you can replace the tank or the bowl individually. However, if the one-piece toilet breaks, you have to replace the whole unit.

Resale Value

Neither toilet design has any impact on the resale value of a home. However, having a working toilet that does not leak is part of what helps maintain a home’s value. It’s important to have a working toilet, regardless of type or style.

What is the popular 1 piece toilet this year?

What is the popular 2 piece toilet this year?