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Video · Water Heaters

A Wall Mounted Tankless Water Heater Going Up in a Basement

A wall mounted tankless water heater hangs on the basement wall instead of standing on the floor. Here a tech solders the copper that feeds it while gloved hands make the connections underneath, and white PVC vent pipe runs out the top.

How long water heaters last, and what decides it: our full guide.

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What you’re seeing in this video

A tech in a black cap and gloves stands on a yellow ladder in an unfinished basement, torch in hand, soldering copper overhead. Below him, gloved hands tighten fittings into the bottom of the new unit, a white tankless heater hung flat on the wall with a small control panel on its face.

New copper water lines run down to it and white PVC vent pipe leaves from the top. The text on screen walks through the signs an old tank water heater is finished; the footage is the replacement going in.

Job footageSwiftPro
Topic
Water Heaters
Length
0:38
Posted
September 23, 2026
Shot by
The SwiftPro crew, Northern Virginia

Why it matters in your house

  • Wall mounted means the floor where a tank used to stand is free again, which matters in a tight utility room or a basement you plan to finish.
  • A gas tankless unit needs its own vent run and a gas line sized for it. Those two things decide whether it can go where the old tank was.
  • Hard water builds scale inside a tankless heat exchanger, so it needs descaling on a schedule. Service valves on the water lines make that a quick job.

Does a tankless water heater need a vent?

A gas one does. It burns fuel, so the exhaust has to go outside through its own vent, and many newer units vent through PVC pipe like the run in this clip. An electric tankless heater needs no vent, but it usually needs a big upgrade at the electrical panel.

Want it done at your place? See Water Heaters at SwiftPro or call (703) 997-9757.

More videos from the SwiftPro crew

Two techs cut open an old GE electric water heater in front of a SwiftPro van at the shop, peeling back the insulation to show the inside of the tank.0:38How Does a Water Heater Work? Two Techs Cut One Open to Show YouTyler Griffin (name on screen) stands in the SwiftPro warehouse between two old tank water heaters, one cut open to show the corroded inside, with a '$500 off New Water Heater' banner.0:35Rusty Water Heater, Outside and In: Tyler Griffin Shows BothA tech walks a homeowner through a gas water heater install in an unfinished basement, pointing at the expansion tank area and piping while captions talk about thermal expansion.1:05Power Vent Water Heater Install: Four Details Worth SeeingA tech explains a leaking gas water heater to a homeowner in an unfinished basement utility area, pointing to the tank and the gas shutoff.0:33Water Heater Leaking: What to Do in the First Five MinutesA tech in a gray hoodie cuts copper pipe with a pipe cutter on a drop cloth.0:36Water Heater Replacement Process, Heard Up CloseA SwiftPro van parked at a house with a brick pillar; a tech in a SwiftPro hoodie and cap wheels a boxed Navien NPE-A2 tankless water heater off the van on a hand truck; a young tech unboxes parts in 0:33A Navien Tankless Water Heater, Delivered and Unboxed

See all 234 SwiftPro videos

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SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276

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