How to Install a Tankless Water Heater

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Expert DIY advice on how to remove an old water heater tank, prepare for a new tankless water heater, and install the tankless water heater. A tankless water fastball, besides called an on-demand body of water heater, saves money because it doesn ’ triiodothyronine shop a large volume of heated water system. What it does is provide hot urine on demand so you don ’ t have to worry about the shower suddenly running cold.

But there is one caution : Because a tankless water fastball heats the water real-time as the urine moves through the unit, it can lone heat a given sum of water system at one time. As a result, it may not work in a family where two or three showers may be running at the like time. The issue of hot-water fixtures it can serve at one time will depend upon the heating capacity of the unit. This project calls for estimable bathymetry skills, and local anesthetic codes may require that a license plumber do the work. If you can and choose to do the job yourself, you should know how to shut off the water to your sign of the zodiac ( see How to Shut Off the Water to Fixtures ) and how to cut into and connect raw fittings and pipes to your provide pipes ( if you have copper pipes, see Cutting & Joining Copper Pipe ).

There are a couple of basic options : • An indoor, gas-powered tankless urine heater must be vented to the away. It besides requires a natural gas channel and a connection to a 120-volt tour. It can be plugged into an release or wired immediately to a servicing dialog box. • An indoor, electric tankless body of water heater does not need to be vented to the outside. It does require 240-volt ability. It may be plugged into a 240-volt exit or directly wired to a military service jury .

Tankless Water Heater Preparation

Before you disconnect and remove your existing water system heater, be certain to do all of the necessity preparation—you don ’ triiodothyronine want to be stuck without blistering body of water for a week or two while you ’ ra waiting for needed plumb, electric, or vent shape.

If you are installing a new boast unit, control to see if you need your boast meter upgraded. Because the unit uses lots of BTUs, your meter may not have a large enough capacitance to supply it along with the early gas-using appliances in your home. The flatulence company can check this out for you and normally will upgrade the meter at little or no cost. besides have the accelerator company determine to see that it supplies the correct sum of manifold pressure for your new unit. A tankless water heater normally requires a 1-inch gas pipe from the meter to the water fastball. If you need to install a modern accelerator line, it is best to hire a professional plumber to do this. You may want to have another flatulence shutoff valve installed just prior to the unit being installed. An indoor gas unit of measurement will besides require vent. Because a tankless urine heater produces a good deal of condensation and pushes air out with a fan, you will need to use class II stainless-steel consume pipe with tightly sealed silicon joints, as shown in the second video below. If you ’ re installing a high-efficiency tankless water system heater, you may be able to use formative pipe, as shown in the This Old House video recording below. If you live in a cold climate, it ’ s a commodity theme to include a damp to prevent cold breeze from coming second in. Depending upon the fastball ’ second cook and model, you may besides install a condensation drain, which drains body of water from condensing through credit card tube. This should be routed to a floor drain or a utility sink. Consult the manufacturer ’ s literature for all plumb and vent requirements.

A gas unit besides needs 120-volt electric might. design to plug it into a nearby mercantile establishment, or telegram it directly to a articulation box. here is a in truth good video from This Old House that will give you an excellent overview of the diverse steps involved in installing a tankless water heater. This exhaustive video, by Ron Hazelton, explains how a failing conventional water heater can cause debris in your urine that clogs faucet aerators, shower heads, and other water-using devices. He decides to remove and replace his failing water fastball with a tankless water fastball, and walks us through the process. If you are installing an electric water heater, which requires 240-volt electric power, have an electrician route the wire to it unless you are certain of your skills.

Codes require a subpanel ( which may be supplied along with the unit ) to be installed adjacent to the unit of measurement. This subpanel has its own circuit breakers so you can cursorily disconnect ability to the unit if needed.

Run wiring into the subpanel and then from the subpanel to the unit. Be certain that the power to the water fastball ’ sulfur tour is off at all times while the work is being done. + Find a Water Heater Installation Pro Near YouGet Free Bids Now!

Removing the Old Water Heater

In most cases, a new tankless unit will replace a storage urine fastball. In Ron Hazelton ’ s video above, he references our web site for the instructions : How to Flush or Drain a Water Heater. To remove the old water fastball, shut off the valves on the two water lines ( one intake and one release ) leading into the existing urine fastball.

Use channel-type pliers or a shriek wrench to loosen and disconnect the lines from the water heater. Open the drain valve at the bottom and drain the tank. On a gas unit, shut off the flatulence line valve, and disconnect the boast line. Disconnect and remove a section or two of vent pipe.

If the unit is electric, you may choose to hire an electrician to disconnect the cable as 240-volt exponent can present an electrocution guess. If you choose to do it yourself, shut off the circumference at the military service control panel and test to make sure the power is off. Disconnect the wires from the whole and remove the erstwhile water heater. If you need help with this project, call a local water heater pro .

Installing a Tankless Water Heater

A new tankless unit can be installed flush—against the wallboard or plaster—or set into the wall, between studs. If you want to set the whole into the rampart, use a dot finder to locate studs and cut a hole between them. Attach the unit to the wall following the manufacturer ’ randomness instructions. path water supply pipes to the water fastball. Be certain the organ pipe from the water utility leads to the intake and the pipe leading to the house is connected to the release. Install shutoff valves on both lines near the unit. You besides may need to add a pressure-relief valve. Use union fittings to make the final examination connections to the intake and the exit. Open the water valves but not the electricity or boast. loose faucets in the house to run body of water through the whole for a moment or so. Shut off the water system valves. Remove the inline filter, normally located near the inlet, and clean out any debris. Replace the filter, open the water system valves, restore electric power, and turn on the boast. ultimately, test the unit to make sure it is operating by rights.

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About Don Vandervort Don Vandervort has developed his expertness for more than 30 years, as Building Editor for Sunset Books, Senior Editor at Home Magazine, author of more than 30 home improvement books, and writer of countless magazine articles. He appeared for 3 seasons on HGTV ’ s “ The Fix, ” and served as MSN ’ s home expert for several years. Don founded HomeTips in 1996. Read more about Don Vandervort

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Category : How To

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