◇　 Compare tank toilets and tankless toilets!　 ◇

 

 

 

Usually, residential style flush toilets can be broadly divided into two types.

There are “tank toilets” and “tankless toilets.”

 

When thinking about renovating a toilet, the first thing that comes to mind is whether it should be the traditional tank type.

Isn’t it a matter of going for the latest tankless model?

 

However, did you know that tankless toilets may be difficult to install depending on the building?

In this column, we will introduce a comparison between tank toilets and tankless toilets.

I hope this will be helpful for your renovation.

 

 

table of contents

 

１　What are “tank toilets” and “tankless toilets”?

 

When renovating a toilet, many people are confused about whether to choose a tank toilet or a tankless toilet.

 

First, we will introduce the mechanisms of “tank toilets” and “tankless toilets.”

 

 

[What is a tank toilet]

A “tank toilet” is a commonly used flush toilet that combines a tank, toilet bowl, and toilet seat.

 

■ Features

This is a method of cleaning by storing water in a tank and letting it flow.

The most common type is the low tank type, where the tank is directly above the toilet bowl.

 

■ How the toilet tank works

1. When you turn the handle lever, the float valve that was blocking the drain will be pulled up.

　The water that has accumulated in the tank will flow and be cleaned.

2.When the water level in the tank becomes low due to water flowing out, the water supply valve opens and water collects in the tank.

 

 

[What is a tankless toilet]

Tank toilets are made up of three parts: the tank, the toilet bowl, and the toilet seat.

A tankless toilet is a flush toilet with an integrated toilet seat that does not have a tank.

 

■ Features

This method allows drainage by controlling water flow and water pressure.

 

In 1993, TOTO released Japan’s first tankless toilet, which is characterized by its low silhouette and clean appearance.

 

■ How tankless toilets work

1.Water pressure is applied directly from the water supply pipe.

2. Swirl this to the side in the toilet bowl.

3.It is a system that allows efficient and powerful drainage through the siphon action inside the drain pipe.

 

By the way, the name “Washlet” is a registered trademark of TOTO.

The official name of the type of toilet seat that allows you to wash your butt is “warm water washing toilet seat”.

 

 

 

 

 

Next, we will introduce the advantages and disadvantages of tank toilets and tankless toilets.

 

～Tank type toilet～

 

merit
– Cheaper than tankless toilets

・Even during a power outage, waste can be flushed away

・It is possible to flush waste regardless of water pressure.

 

・Because it is not an integrated design, the heated toilet seat can be replaced.

 

Demerit
・Space becomes smaller due to the presence of a tank

・Unable to flush water until it accumulates in the tank

– Difficult to clean every corner compared to tankless toilets

 

～Tankless toilet～

 

merit
・High design quality

・Since there is no tank, you can use more space and it is easier to clean.

・Water can flow continuously as there is no need to store water in the tank.

・High water saving effect (less than 1/3 water volume compared to tank type)

 

Demerit

・Water cannot be flushed during power outages or water outages

・Installation may be difficult due to water pressure

・Due to its integrated design, it cannot be replaced with a new heated toilet seat.

・No hand wash included

 

Don’t make a decision based on the design alone; be sure to check that there are no problems with water pressure, etc.

 

 

３　 Regarding disaster response and water pressure