Where Can You Mount a Tankless Water Heater

It's a tankless job simply somebody's gotta exercise it.

All dad jokes aside, installing a tankless water heater is an important task that requires careful attention. To make it every bit easy and painless as possible, we've listed step-by-footstep instructions below — for both gas and electric units.

Note: Replacing a tankless h2o heater is a complex task that requires high-level technical skills. So if y'all don't feel fully prepared with your plumbing and electrical skills, it's best to hire a licensed professional — in some locations, this is required. And make sure to follow local electrical and plumbing codes for installing and sourcing parts.

How to Install a Gas Tankless H2o Heater

Nosotros sympathise that installing or replacing tankless water heaters can be very costly. It's possible to install your own unit, but we must circumspection you. You should merely exercise this if you are very familiar with working with gas lines, h2o lines, and electric. If your tankless water heater is installed improperly, y'all could exist left with extreme damage. Improper gas lines tin can event in explosions, improper gas venting can result in dangerous carbon dioxide leaking into your domicile, and poorly installed water lines can go out you with harmful h2o damage.

If you are thinking of a DIY install, it'due south of import to know the details of your insurance. Some insurance providers volition non cover damage to your dwelling unless your tankless h2o heater was installed by a licensed professional.

If yous are confident in your abilities and have double checked with your insurance, the steps below volition walk you through how to install your unit.

Step 1

Read the Product Transmission Thoroughly

Some manufacturers will void the warranty if their systems aren't installed by licensed contractors.

Pace 2

Pull Permits

Make sure you pull any required state or urban center permits for installing or replacing a water heater.

Step three

Be Sure You Accept the Right Water Pressure level

If incoming water force per unit area is above eighty psi, you'll demand to install a pressure reducing valve upstream of the new water heater.If y'all demand to install one, yous should exercise that when installing the cold and hot water connections (see "Establish the cold and hot water connections" department below).

Step 4

Cull a Location for Your Tankless Gas Water Heater

• Check your local building lawmaking to confirm where you lot tin install your water heater inside your home.
• These tankless gas units need to vent directly to the outside through a pipe, not through a chimney. So it'southward necessary to find a spot that volition let the unit vent outside easily, while post-obit local code for vent location.
• Read the manufacturer's installation instructions carefully to make sure you take enough clearance around the unit.
• Avoid areas where:
  • Freezing temps can affect the unit.
  • Any blazon of liquid could regularly splash on the unit.
  • There'south a lot of humidity and moisture.

Pace 5

Measure the Install Infinite

Advisedly measure the space where you desire to place the water heater, so you buy the right-sized unit.

Step half-dozen

Verify or Upgrade your Gas Line

• Tankless gas water heaters use more gas than tank style ones. And so, first decide whether or not your current gas line will suffice.
• If your current gas line won't cut it, you'll need to get a licensed contractor to install a newer, bigger gas pipage.

Footstep 7

Remove Your Onetime H2o Heater

• Turn off the h2o supply to the unit.
  • If at that place's no close off valve before the heater, plow off your main h2o supply.
  • Shut off whatever power and gas supply valves feeding the heater.
  • Drain the unit.
    • For hot water, employ a hose rated to withstand heat. Open up a hot h2o faucet to release pressure in the system. Let it fully drain.
• Disconnect the water heater from the gas and water lines.
• Dispose of your one-time water heater properly.
  • Contact your local recycling and/or sanitation departments for information on how to properly get rid of it.

Step 8

Mount the Unit

• Create a mounting box that will securely back up the unit, and mountain it almost iv inches out from the wall. Use proper anchors for the foundation wall.
• Follow the manufacturer'southward directions to securely mount the unit to the box.

Step 9

Install the Gas Line

• Unless you have strong experience with gas pipe connections, hire a licensed contractor.
• If your electric current gas line is the appropriate size and y'all can connect to the existing tee, employ a threaded black iron pipe to continue the gas line to the unit location. If you're removing the down piping for the old unit, retrieve to turn off the main gas line beforehand.
• Subsequently you brand sure the gas line runs to the proper place, install a tee, sediment trap, and gas shut-off valve. Follow the manufacturer's instructions to connect the shutoff valve and sediment trap to the heater.
• Run a new gas supply line from the tee to a spot where it tin can hands attach to the new unit's gas line. Yous can employ a black pipe or flexible gas supply line.
• Employ two wrenches to assemble the connections towards the heater, starting at the tee. Use thread sealant designed for gas lines when making gas pipe connections.
• Later on you lot cease making all the gas line connections, test the line. Use a gas pressure exam judge before turning on the gas.

Step 10

Install New Water Lines

• Follow the manufacturer's directions to connect the h2o heater valves to the water supply line.
  • Use copper pipe to connect new hot and cold water lines to existing h2o lines.
  • Run the lines to the new unit. Yous may demand to cut and solder copper pipage to the unit.
• You may demand an expansion tank nigh the cold intake if your water system has an anti-siphon valve or bank check valve on the supply line. Refer to your owner'southward manual for more data.
• Secure the pipe against the wall with bong hangers.
• Install the pressure relief valve. Follow the manufacturer'south directions for installing a purge valve and force per unit area relief valve.

Pace 11

Check for Leaks

• Plough on the water supply and check for leaks.
• Plow on the gas and check for leaks. You may need to bleed the line.
• So, turn the gas line off until the installation is complete.

Step 12

Install the Exhaust Vent

• Apply the manufacturer's instructions equally a guide for venting the unit properly. There'due south a practiced take a chance that y'all tin can vent the h2o heater directly through your habitation'south rim joist. Only use pipes that are rated for this type of venting. Y'all'll need a vent kit, depending on the manufacturer.
• Utilize heat-resistant silicone sealant to the vent shaft of the new unit. Then, identify a connector on information technology and secure information technology with a hose clamp.
• Place a section of stainless steel vent piping on top.
• Slip on a retaining ring. Secure it by folding over the tabs.
• Slip on an elbow. Bespeak the opening in the direction where the unit volition vent to the outside.
• Choose a point on the joist or wall to be the center of the vent hole for venting exterior. At the chosen spot, drill a hole from the inside
• Use a vent thimble to outline a circumvolve on the outside wall. Near the top of the circumvolve, bore a 1-inch hole, using a spade bit. Utilise a reciprocating saw to cut out the vent hole.
• To allow the flange thimble to be flush against the outside wall, remove siding and shingles from effectually the vent pigsty.
• Place silicone caulk around the border of the flange. Then, insert the flange into the vent pigsty. Employ screws to secure information technology well to the outside wall and seal them with silicone.
• From the within, install the interior flange.
• Run a section of vent pipe through the flange opening. Secure each section with the tabs.
• From outside, connect a small section of vent pipe and connect the vent hood.
• Put back the shingles and siding you took off earlier.

Step 13

Purge Air from Water Pipes

• To purge air from the water pipes and heater, open a faucet to full "hot."
• Plough off the faucet.

Footstep xiv

Plug in the Water Heater

Plug in the water heater. It'due south that simple.

Stride fifteen

Insulate Hot Water Pipes

Insulate the hot water pipage that comes from the water heater.

Step 16

Plow on the Gas

Later on installation is complete, plough on the gas. Your water heater should now be functioning!

How to Install an Electrical Tankless Water Heater

We empathize that installing or replacing tankless h2o heaters tin be very costly. It's possible to install your own unit, but we must circumspection you. Y'all should only practise this if yous are very familiar with working with water lines and electrical. If your tankless h2o heater is installed improperly, you lot could be left with extreme harm.

If you are thinking of a DIY install, it's important to know the details of your insurance. Some insurance providers will not cover damage to your home unless your tankless water heater was installed by a licensed professional.

If you are confident in your abilities and have double checked with your insurance, the steps beneath will walk yous through how to install your unit.

Step ane

Read the Production Manual Thoroughly

Some manufacturers volition void the warranty if their systems aren't installed by licensed contractors.

Step ii

Confirm Sizing of Your Electrical Service Panel

Confirm whether or non your electrical service panel can handle the energy needs of an electrical tankless water heater. You lot might need to upgrade your panel or run a make new 1.

To find relevant information, you can wait at the electrical breaker box or label in your electrical panel. You lot can besides ask an electrician.

Most sufficient h2o heaters require a minimum of four 40AMP breakers to supply hot water for a 2 1/2 bath abode.

Step 3

Be Sure You Have the Right H2o Pressure

If incoming water force per unit area is above fourscore psi, you lot'll need to install a pressure reducing valve upstream of the new h2o heater. If y'all need to install one, you lot should exercise that when installing the common cold and hot h2o connections (see "Establish the common cold and hot water connections" section below).

Pace four

Pull Permits

Make sure you pull whatsoever required land or city permits for installing or replacing a water heater.

Step v

Find the Perfect Spot

• For heating water for the unabridged habitation, you'll desire to place the unit of measurement closest to where most of the hot h2o is used.
• For a point of use system, place these as shut to the points of usage as possible.
• Go along in mind that most electric tankless water heaters take to exist installed vertically, with water and power supply connections facing downwardly.
• Follow manufacturer'south directions on leaving at least a sure minimum clearance for servicing.
• Overall, you want to avoid areas where:
  • Freezing temps can impact the unit.
  • Any type of liquid could regularly splash on the unit.
  • In that location's a lot of humidity and wet.

Stride 6

Turn Off Circuit Breakers

Turn off all excursion breakers related to the new unit. This is very important!

Step 7

Turn off the Master Water Supply

You don't want to inundation your workspace!

Step viii

If Needed, Disconnect Your Existing Water Heater

• Turn off the water supply to the unit.
  • If there's no shut off valve before the heater, plough off your main water supply.
  • Shut off any power and gas supply valves feeding the heater.
  • Drain the unit.
    • For hot water, utilise a hose rated to withstand heat. Open up a hot water faucet to release pressure in the system. Allow it fully drain.
• Disconnect the water heater from the gas and water lines.
• Dispose of your old water heater properly.
  • Contact your local recycling and/or sanitation departments for information on how to properly get rid of it.

Step 9

Take Off the Cover

• Remove any screws that are securing the front embrace of the new unit of measurement.
• Important: Yous might take to remove at least one plug before you lot tin put it aside.

Pace 10

Mount the Unit to the Wall

Its parcel should include the appropriate anchors and screws.

Step xi

Institute the Water connections

• Found the cold and hot water connections. Cold is commonly on the right side.
  • The easiest route is using stainless steel flex piping with Teflon tape.
  • Yous can as well use copper tubing that'southward rated for high temperature applications.
  • If you need to cut into a pipe, clean upwards the edges.
  • When you solder pipes, flush them before connecting them to the water heater. And remember that excess rut can damage the water heater.
  • It's a practiced idea to install a shut-off valve before and after the heater, to turn off the water supply to the unit for maintenance without shutting off the supply to the residuum of your abode.
  • If you need to install a pressure reduction valve, you lot should do so now on the cold water side.
  • Y'all probably won't need to install a temperature and pressure relief valve (T&P). Merely, you should confirm whether or not yous need one, by checking your local and state installation codes.

Step 12

Purge Air & Cheque For Leaks

• Purge air from the unit and the pipes past opening several hot water outlets.
• While waiting, you should cheque every connection for any leaks.

Pace 13

Close the Water Outlets

Practice not skip this step!

Step fourteen

Create the Electrical Connections

• The heater should be on one side and the electrical panel on the other.
• Follow the manufacturer'south wiring diagram, and their directions for choosing the correct wire, excursion billow number, and circuit breaker size.
• After cut every wire ready to length and stripping it, push them through the bottom holes of the new water heater'southward housing.
• And so secure the wires to the right slots on the terminal block.
  • Refer to the product manual for optimal torque.
  • Remember that for each circuit, a ground usher needs to be connected to the circuit billow console and the unit of measurement's grounding busbar.
• Check all of the electrical connections, to confirm that you placed all the wire sets correctly.

Step 15

Put the Encompass Back On

Use the screws you removed before.

Stride 16

Plow on the Circuit Breakers

At present, the unit should exist on. Choose your preferred unit settings.

Step 17

Check the H2o Temperature

Plough on the hot side of a faucet in your home. Cheque the h2o temperature after it has stabilized. If you desire to accommodate the temperature, arrange it on the unit of measurement.

Learn More About Tankless Water Heaters

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Source: https://www.reliantplumbing.com/water-heaters/tankless-water-heaters/how-to-install/