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Compare tank toilets and tankless toilets!

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◇  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”.

 

 

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2 Advantages and disadvantages

 

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.

 

 

当社施工事例はこちら リノベーション

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3  Regarding disaster response and water pressure

 

Among the advantages and disadvantages, the two points to be concerned about are “disaster response” and “water pressure.”

 

Lastly, I would like to introduce these two points.

 

 

~Response in times of disaster~

Even during a water outage, a tank-type toilet can flush one flush using the water stored in the tank, but once the tank is empty, the procedure for dealing with it is the same as for a tankless toilet.

 

[During water outages, pour water directly into the toilet bowl with a bucket]

1. Spread newspaper or rags around the toilet.

2. Drain the bucket of water (about 6 to 8 liters) into the toilet bowl at once.

(Please note that pouring water into the tank may cause clogging.)

 

 

~Water pressure~

Tankless toilets use water pressure from the water pipes, so if the water pressure is insufficient, problems such as poor water flow and clogging can occur.

 

When installing a tankless toilet, check in advance whether any of the following apply.

 

 

[Buildings where it is difficult to secure sufficient water pressure]

・Buildings on high ground

・Condominiums and buildings

・Floors above the second floor of a detached house

・Old buildings

– Poor shower flow

·well water

 

The above is just an example.

In addition, water pressure may weaken if new housing is built all at once and water usage overlaps.

 

 

<Guideline for checking water pressure>

There is no problem if you leave the bathroom faucet on the floor with water running and the water pressure is strong enough to make the shower head move (splash).

 

*If the faucet/shower output is extremely weak or the water fills the tank extremely slowly, a tank-type toilet may be suitable.

 

 

If you are concerned about water pressure, we will investigate this during the on-site inspection.

It is said that ceramic toilets can last for 100 years as long as they do not crack, but we generally recommend renovating them every 10 to 15 years.

 

 
 
 
  
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