Tips to Install a Tankless Water Heater

What You'll Need
Tankless water heater
Electrical outlet
Phillips screwdriver
Flathead screwdriver
8 x 3 gauge electrical wire

A tankless water heater is a great option for those who are looking to replace their existing water heater. Tankless water heaters have two major advantages. They reduce the monthly expense for heating water. Most models offer as much as a 40% savings over a traditional hot water heater. They also offer sustained hot water which means during periods of the day when multiple people will be using the hot water it will not run out if you have the right size tank for your needs.

Tips for Tankless Water Heaters

  • Never try to install a tankless water heater on an existing outlet. Tankless water heaters use a large amount of electricity to operate so it is important that you supply it with a dedicated electrical line.
  • Make sure you get a tankless water heater which will adequately meet your needs. Models range but the factor which is most important is how many gallons per minute it can put out. If you may be using one or more hot water appliances while taking a shower or 2 or more showers may be running at once then you will need one that has a relatively high GPM rate.

Step 1 – Cut the Power

Cut the power to the breaker panel while you will be working in the panel.

Step 2 – Run the Wire

Run an electrical wire from the breaker panel to the location where your current hot water heater is installed.

Step 3 – Install the Breaker

Connect the electrical wiring to the new breaker. The size of breaker you use should be the correct number of amps for the tankless water heater you will be using. Connect the black and red wires to the two hot inputs on the breaker. The white wire will connect to the neutral connector. The exposed copper wire will connect to the ground on the breaker. Snap the breaker into an open port on the breaker panel.

Step 4 – Install the Outlet

Install the appropriate outlet in the wall for the tankless water heater you are using. Typically this will be a 50 Amp 240V electrical outlet. Connect the black and red wires to the hot inputs on the wire. The black wire will connect to the neutral input and the exposed copper wire will connect to the ground. Turn the breaker panel back on.

Step 5 – Remove the Old Water Heater

Turn off the water lines to the existing water heater and unplug it. Allow it too cool for several hours. Connect a hose to the drain port on the bottom and run it to the outside of the house. Drain the water heater. Disconnect the two water lines from the water heater and pull it out.

Step 6 – Install the Tankless Water Heater

Place the new tankless water heater in the location where the original water heater was located. Connect the main water line to the tankless water heaters input pipe. Connect the hot water line to the tankless water heaters output pipe. Plug the water heater into the dedicated outlet and turn the water back on. Test the tankless water heater in any location of the home with hot water.