Man Installing Tankless Water Heater

Your Guide To Tankless Water Heater Installation

Tankless water heaters are slowly gaining popularity in the market and for good reason. These heaters don’t take up too much space and can easily fit inside small spaces. Individuals can benefit from hot water on demand and that significantly reduces energy costs.

Not to mention, you won’t have to worry about a bulky heater crowding your space.

Man Measuring Installations of Tankless Water Heater

Benefits Of Tankless Gas Water Heaters

Here are some advantages of installing a tankless gas water heater:

  • Never Run out of Water - Now, you don’t have to worry about running out of hot water. Tankless Water heaters offer an endless supply of water on demand.
  • Durability - These water heaters are known to last up to 10 years longer than traditional tank water heaters.
  • Greater Efficiency - These heaters are more efficient with no standby heat loss.
  • Less Space - Individuals can mount the water heater anywhere they want since it doesn’t take up too much space. These water heaters can also be installed outdoors with an anti-freeze kit.

How To Install A Tankless Gas Water Heater

Have you recently purchased a tankless gas water heater? Perhaps you should consider installing it by yourself. However, keep in mind that these heaters typically require larger diameter gas supply lines, larger diameter exhaust systems, stainless steel flue and a higher voltage power supply. Also, one should be careful and take special caution while working with propane.

Installing Tankless Water Heater

Keep these factors in mind before you decide to DIY. It is also recommended that you use a special union connector that will result in simple installation and maintenance process in the future. Here how you can install a tankless water heater by yourself:

  • Before you begin the installation process, turn off the main incoming water to your home
  • Next, disconnect the old water heater. The heater may still have some leftover water in the tank so consider placing a bucket under the water bib to catch any spills. You can skip this step if you are not replacing an old water heater.
  • Next, disconnect the heat source from your current water heater. If it’s a gas water heater, ensure the supply valve is closed or simply unplug the appliance if it’s an electric water heater. Once you have disconnected the old heater, it is time you replace it with a new one.
  • Unbox your new tankless gas water heater and take a look at the hardware and instructional materials carefully.
Finishing of Tankless Water Heater Installation
  • Now, it is time to determine the best possible location for the water heater. Also, make sure you have read and understood the state and local building codes before installing the water heater.
  • Mount your new gas water heater on to a wall according to the manufacturer’s instructions. Ensure that you have appropriately supported the heater’s weight so it doesn’t fall or tip over.
  • Next, hook up all the connections and wire up the heater.
  • Consider installing ventilation ducting. Such gas heaters require larger flues for operation.
  • Plug in the water line and heat source. For a gas heater, you will need to install a gas supply line and open up the valve. The heater should be installed in the same direction as the valve.
  • Now, follow the instructions mentioned on the heater and light the pilot.
Man Standing Next to Tankless Water Heater

Hiring a professional to install your gas water heater may cost around $200 to $600. The process will involve mounting the water heater on a suitable location and connecting it to existing vent ducting. It will also include preparation and cleanup of the area.

How To Install A Tankless Electric Water Heater

Installing a tankless electric water heater is not a relatively easy DIY project. Hire a licensed electrician or plumber to do the job for you. Hiring a professional to install your electric water heater may cost around $200 to $600. A tankless electric water heater does not need to be vented outside like a gas powered one.

Man Connecting Wires on Tankless Water Heater

However, it will need to be plugged into a 240-volt outlet.


Keep these factors in mind when you are installing a tankless water heater. Installing a tankless heater can be one of the best decisions you ever make, not to mention, it can help you save hundreds of dollars on your water or gas bills. Choose between a gas and electric model depending on your convenience and personal preference.

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