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DIY Plumbing Tips: Install Tankless Gas Water Heater at Home

Need a Water Heater Installation? Maybe your conventional tankless gas water heater needs replacing and you probably are thinking of installing a tankless gas water heater. Most owners tend to switch to tankless water heater because often conventional ones are found heating or clogging your home’s water pipes with debris. Everest Drain and Plumbing, your Toronto plumber will take you to step by step through an installation of a tankless water heater.

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Install a Gas Supply Line for the Tankless Water Heater

Firstly, you should install a T valve in the existing gas line. Now, run a new corrugated stainless steel supply line for the tankless water heater.

Tie Copper Waterlines for the Tankless Water Heater

You should then tie in new waterlines for the tankless water heater. Bell-hanger brackets are best to hold the pipes in place. It helps to prevent contact with the wall and to facilitate applying pipe insulation. Clean copper pipe joints and coat with flux before soldering.

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Build a Covered Platform and Position the Tankless Water Heater

Construct a covered vertical platform to position the tankless water heater. Its vent should clear the floor joists and pass through the outside wall. Hang the tankless water heater on the covered platform. Secure it by driving screws through the holes on its mounting bracket into the platform.

Connect Valves, Traps and Supply Lines to Tankless Water Heater

Connect the gas shut-off valve and sediment trap and then attach the corrugated stainless steel supply line. Make connections between the water shutoff valves and the tankless water heater. It’s better to use bell-hangers to support the pipe runs.

Attach Heater Vent Piping, Connectors and Elbows

You should then apply heat-resistant silicon sealant to the heater vent. Slip on a connector and secure it with a hose clamp. Then add and secure sections of vent pipe as well as elbows. Bore through the outside wall at the center of the vent hole.

You are almost done!!!

Install metal thimble through the outside wall and finish up remaining connections of the vents. Don’t forget to protect the pipes with per-shaped insulation.


  • Start Using Hot Water

You are ready now and can use your tankless water heater without any problems.

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