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How to Install a Tankless Water Heater?

How to Install a Tankless Water Heater

A water heater is a life savior, especially in wintertime, when you need that relaxing warm shower to soothe your mind and body. These are also very effective in dishwashing due to the quick removal of the debris.

You will find two types of water heater, tank-based and tankless one. The former one is considered as an old model and normally heats a limited amount of water.

The water stays warm throughout the day, whether you want it or not, and as a result, this increases your electricity bill.

On the other hand, the latest one (tankless) heats the incoming water on demand. If you need the water to be warm at a certain period of time, your desire will be fulfilled by this device.

As a result, the overall electricity bill will decrease with time, and you will love to have it installed at your home without a shadow of a doubt.

The installation process of a tankless water heater is very easy, and you just need a couple of minutes to get the overall idea about it.

So, for your benefit, the following article is written. Go through the steps so that you can understand the overall idea and prepare yourself to get the desired output.

Check it out.

How to Install a Tankless Water Heater?

Here is the step by step installation guide about the tankless water heater.

  • Step 1: Take Necessary Precautions

Before you dive into the work, you must understand some basic things about it. In order for the tankless water heater to operate efficiently, you must have gas supply lines, and it must be of big diameter.

As the incoming water will only be heated according to your temperature control, the power supply should have a high voltage. Due to the large gas lines, the exhaust system should also be large for proper functioning.

  • Step 2: Disconnect Everything

There is a water line directed to your home, so make sure you disconnect that connection. If you have your old water heater installed in your kitchen or any other area, cut off the supply line also. To be on the safer side, take a bucket and place it below the line to collect any stored water.

After you are done with the supply lines, move on to the heating mechanism of the old heater. Disconnect it according to the kind of heat source that you are having (gas or electric).

  • Step 3: Read the Manual of the Tankless Water Heater

Take the new heater from the box and put it on the installation area. There will be an instruction manual present, and you must go through all of it.

Choose a spot where you are going to install it and then mount it carefully. Put it in a moderate height so that you can easily do the maintenance in the future (if needed).

  • Step 4: Do the Connections

To have a good spreading of fresh air due to the gas, you need to do the ventilation ducting. Simply install a stainless steel flue pipe, and you are good to go. Now comes the most important part, that is the water supply line. Install it according to the directions from the instruction manual.

If you have the kind of heater that runs on electricity, you just need to have a power source for the plug to get in. For the kind of model that operates with the help of gas, you will need a gas supply line that will run straight towards the heater.

  • Step 5: Check the Result

Turn on the faucet and check the water temperature. Suppose it is not getting warmer, you then need to fix the supply line along with other connections. If the opposite happens, congrats! You are done with this DIY task.


For additional information, go to the ‘statement posted on the SmartWheater.com‘s blog.’ From there, you will be able to clear out any kind of confusion.

Consult with the plumber and electrician to gain their insights. This will surely help you out during the time you are working on this project.

Have a good day.