Installing a Tankless Water Heater

Technology provides for adequate supply while saving energy.
TS-86544093_basement-appliances_s3x4

TS-86544093_basement-appliances_s3x4

Appliances in basement

Photo by: Jupiterimages

Jupiterimages

A home's water heater affects both the comfort level in the shower and bath, as well as the monthly utility bill. If a conventional heater is the wrong size, hot water may run out too soon, while constantly heating and reheating stored water for the home's needs can be costly.

A gas-fired, tankless water heater addresses both problems since the water is only being heated when it is needed, thereby conserving energy while ensuring an adequate and dependable supply to the household.

Before you install this type of water heater, check with your gas company for proper sizing of your gas main. Typical tankless heaters require more gas than the largest residential furnaces.

Once you have that information, here's how to install the heater:

  • Measure and cut your copper pipe.
  • Burr and polish the pipe, then apply flux to it and the fitting.
  • Dry fit the copper pipes to ensure a tight fit.
  • Pre-drill the holes for the expansion anchors and secure the pipe clip in place.
  • Sweat the plumbing joints by heating the ends of the pipe and soldering together.
  • Install your black iron gas piping with a shut-off valve and a dirt leg at the water heater. Use Teflon tape on the pipe threads.
  • To install the vent piping, make sure the outlet is kept away from windows, doors and ventilation air intake hoods.
  • Most tankless water heaters require disconnect switches, which should be installed next to the water heater.
  • Run water through the unit before powering it up.

Keep Reading

Next Up

Maximum Value Energy Efficiency Projects: Water Heater

Water heaters that are more than 10 years old are doing your home more harm than good.

Choose the Right Size Water Heater

Learn some handy numbers to help you meet your water needs.

Building a Home Theater

Gather all the info you'll need on building a home theater, and get ready to construct a comfortable and stylish entertainment space in your home.

How to Build a Home Theater

Want a movie-theater experience in your home? Learn how to build a home theater with step by step instructions from the pros at HGTV.com

Building a Horizontal Plank Fence

A redwood fence is built on an angle to lend privacy to a sloping backyard.

Building Up Vs. Building Out

Consider the pros and cons of the direction in which you construct your home addition

Closet Systems 101

There are many customization options for closet systems that can be a perfect fit for your home and lifestyle.

Thermostats and Control Systems

They're no longer ugly, boring and hard to program. Some thermostats today are so automated, you can save energy without doing a thing.

Basement Building Codes 101

Knowing what you can and can't do is a key to good planning.

Alternative HVAC Systems

Pellet stoves and furnaces are hot, but there are other keen ideas for getting the most out of your heating and cooling systems.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.