How Does a Tankless Toilet Work

Advancements in technology have brought about so much equipment into existence. The equipment’s popularity and purpose for what they were made have made many people adopt them. The same advancement also turned the structure of the household to a new level, and that advancement brought about tankless toilets. 

While many people are familiar with the existence of this type of toilet, some are not. Despite the advancement of a tankless toilet, the equipment has made people ask how does a tankless toilet work and if it is easy to use. Either way, there is more to the tankless toilet.

How Does a Tankless Toilet Work

What Is a Tankless Toilet?

A tankless toilet is a new toilet model that flushes without requiring a water tank. Unlike the standard tank toilets that are widely used, tankless toilets use water delivered directly from a supply pipe at a pressure high enough to move fecal matter through the drainage system with just one flush.

The tankless toilet is the revolutionary idea of inventors mainly to clean at high speed and refill at high speed, thereby making the toilet a comfortable thing to use, especially public toilets. Also, the tankless toilet is a solution to the lack of water to flush due to the poor function of the toilet’s tank. Instead, the tankless toilets are connected directly to the water source, which makes flushing effective.

Related: Best Tankless Toilets

Many varieties

The tankless toilet comes in different forms, just like the tank toilets. There exist floor mount tankless toilets and wall mount tankless toilets. 

The floor mount tankless toilet is a tankless toilet fixed on the floor. It has greater strength and is more comfortable because it is fixed on the floor compared to wall mount tankless toilets which are fixed on the wall.

Some tankless toilets have valves on top of them; however, some do not have valves visible, they have them mounted inside the wall, and for effective flushing, you have to push the buttons. Despite these, tankless toilets also differ in flushing types – single and dual flush tankless toilets.

How Does a Tankless Toilet Work

Understanding how a tankless toilet works might be confusing for some people because some are used to conventional toilets and may find it difficult until they get familiar with their new tankless toilet. However, using this type of toilet is quite simple. The tankless toilet has a unique way of flushing despite not having a tank. What differentiates it from the two-piece toilets is the tank, whose purpose is to reserve water for flushing and be refilled after flushing. 

Before knowing how a tankless toilet works, it is necessary to stand the concept of the installation. The tankless toilet pipes are mostly installed inside the wall, unlike the conventional toilets, whose pipes are mostly installed under the bowl. 

Also, you must know that there is a need for an electricity supply because, without electricity, the pumping of water can’t be done. When there is no water directly from the household water source, it is impossible to flush because the tankless toilet needs a high pressure of water for flushing. Once there is water and pressure, the next thing is to know how the flushing method takes place. 

How to Flush a Tankless Toilet Manually

How Does a Tankless Toilet Flush

The flushing of a tankless toilet is effortless and straightforward, though it can still confuse many users because it sounds strange to have a toilet without a tank. 

It is essential to know that a tankless toilet won’t flush without having a flushometer. The flushometer is what serves as the tank of the standard tank toilet. Although the flushometer does not necessarily store water, it activates the flow of water after using the toilet and is also used to control the flow of water used for flushing. Also, a tankless toilet flushometer requires up to 20 PSI of water pressure to operate well.

Types of flushometers

There are two types of flushometers also known as flush valves: the piston and the diaphragm flushometer. The piston has the shape of a cup or piston-like shape, and the diaphragm has a rubber diaphragm shape. They both have high-pressure and low-pressure chambers. 

The high-pressure chamber is activated when doing the first flush, which makes the waste go in entirely faster; when the process is completed, the low pressure becomes activated, thereby making the bowl cleaner. To activate the flushometer, you need to know that the flushometer comes in different types, like a button, dual flush, sensors, and key, so to activate, you need first to know the type that is being fixed. That being said, below are the following steps on how a tankless toilet flushes.

How it really works

The tankless toilet works with a high force of water because the pipe of the tankless water is directly connected to the direct source of the house’s water system.

The tankless toilet has a flush valve, also known as a flushometer, which is connected to the household’s direct water source. After use, the toilet flushes incredibly from the direct water source. It receives water through a conduit with enough force to push waste into the drainage system.

A tankless toilet makes a noise when flushing, unlike regular tank toilets. The rate at which the tankless toilet is being flushed makes it use a minimal amount of water yet gives a cleaner and faster flushing.

How Does a Tankless Toilet Flush

Can I Have a Tankless Toilet in My Home?

Yes! Anybody can install a tankless toilet in their homes, although some things need to be considered before putting a tankless toilet in your home. This toilet installation and the structural process have confused many interested users because it’s mostly seen in commercial areas like malls or hotels. The point is, if you install one in your home, it may not look elegantly fitted like the ones you see in commercial buildings.

Things to consider before having a tankless toilet in your home:


It would help if you were interested before deciding on bringing or changing your toilet into a tankless toilet. Some people adopt some equipment based on its popularity; instead, you need to be sure if you are interested in such equipment and if that equipment will be comfortable. As a family member, seeking your partner and children’s interests is advisable before getting one.


As earlier said, anyone can have a tankless toilet in their bathrooms, but the cost is the most important thing to consider as well. Many tankless toilets are mostly costlier than conventional toilets because they are the new trend. So it is advisable to consider your budget before getting a tankless toilet.

Power supply

The power supply is essential before getting a tankless toilet because the pipe of the tankless toilet must always be connected directly to the household water system. So as an individual, you need to ensure a sustainable power supply where you live to get the best out of the tankless toilet.


Maintenance is another thing to consider when changing your tank toilet to a tankless toilet. You need to be sure if you will be able to maintain the surface and also if you will be able to get the necessary spare parts when the tankless toilet develops faults.


The last thing to put into consideration is the lifespan of the toilet because not all new equipment lasts longer. So, it is essential to search online to see the reviews of those who have purchased it. Also, consider going for a reputable company, as most companies are known to produce better quality tankless toilets and have better customer reviews than others. A good example of reputable companies is TOTO, Kohler, Mansfield, American Standard Company, and others. 

Remember to check for warranties; they’re crucial to consider before buying a toilet, whatever type it might be. Different brands offer different warranties; seek those that provide a longer one.

Read More: How Long Do Toilets Last?

How to Flush a Tankless Toilet Manually

If the water system that supplies water to your tankless toilet isn’t functioning, an alternative way to flush your tankless toilet is by using a bucket filled with water. Water is the only pure substance that is used to wash debris and other toxic waste. Without water, the toilet waste products in your toilet breed into bacteria. It’s doubtless that different diseases would emerge if hygiene is lacking.

To flush a tankless toilet manually, you have to:

  1. Get a bucket, preferably a one- or one-and-a-half-gallon bucket.
  2. Fill it with water from your shower or tap.
  3. Flush your toilet with it.

It would be best to flush it with force to ensure you don’t go for or fetch another water. 

Benefits of a Tankless Toilet

So, you already know how does a tankless toilet work, but you may still be curious to know if the tankless toilet has any benefits and if there are any drawbacks. The tankless toilet has numerous benefits because the primary purpose of the invention was to make the toilet a convenient and comfortable place; therefore, there are benefits.

Minimalist size

Being small in size is one benefit of a tankless toilet. Unlike the standard tank toilet, the tankless toilet has a smaller size, making it flexible to be fixed anywhere in the bathroom, thereby saving enough space to put some other items. 

Water conservation

Conservation of water is one of the unique benefits of tankless toilets. It has been a high complaint over the standard tank toilet that it consumes more water, thereby increasing the water bills. The tankless toilet doesn’t store up at any rate nor uses more water because the pipe is directly connected to the household’s water source; it implies that once you are not flushing, the water can be used for another purpose. And when you flush, the flushometer inside the tablet’s toilet helps to control the amount of water. 

Another advantage of a tankless toilet with dual flushing is that you don’t have to press the high-pressure chamber after urinating. Instead, there’s a button for a low-pressure chamber which helps to get rid of the water and retain more water.


The design of a tankless toilet is also an additional benefit of this type of toilet because it doesn’t have a tank and also has an easy-to-clean surface. Moreover, it enhances your bathroom’s appearance since such models look contemporary and appealing.

Fewer fault 

Another benefit of the tankless toilet is that it doesn’t develop numerous faults. Unlike the standard tank toilet which has a tank with pipes connected to it that could have a crack on the surface or probably have a hole in the pipes, which could cause blockage or leakage that might need a replacement or a total toilet change. The absence of such things makes the tankless toilet last longer without changing each part often.

Longer lifespan 

The tankless toilet design is not complex, and the spare parts are easy to find if there is any fault or a need for replacement. Such toilets have a longer lifespan because they are durable and easy to maintain.


The tankless toilet is a solution to the complaint of people that the standard toilet consumes more water, thereby increasing their water bills. Some even complain that the toilet is the one that takes almost all their budget for the month. The tankless toilet coming into the limelight surprises people because it does not have a tank and works directly from the water supply system. 

Although some think it’s another toilet design that consumes water, this article has clarified the misconception and likewise states the many advantages of the tankless toilet. Starting from its modern look to its function, this toilet does the job perfectly. 

There are many reviews regarding such toilets online. Do your research before getting one for your bathroom, and remember to have the consent of your family members first. We hope this article helped your concerns about such toilet types.

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