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Two gas tank water heaters side by side with an expansion tank in a Northern Virginia home

Why do I have two water heaters?

Because one tank couldn’t keep up. Big homes, big soaking tubs and houses with a lot of bathrooms often got two tanks piped together, so twice the hot water is ready at once. Some homes have two that each serve one end of the house.

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Licensed and insuredVirginia Class A contractor #2705192276

24/7 emergency serviceWe answer day or night, and we will tell you honestly when we can get there.

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From one of our jobs

Two gas water heaters, side by side

Two gas tank water heaters side by side with an expansion tank in a Northern Virginia home
Two gas tank water heaters side by side with an expansion tank. Photo: SwiftPro Heating, Cooling & Plumbing.

Right now: Run the hot water, then carefully touch the hot pipe on each tank. The one that stays cool is the one failing.

When two tanks are piped together they share the load. If one fails, the other usually keeps working, so the first sign is hot water running out sooner than it used to. Both tanks are usually the same age, so when one goes, the other isn’t far behind.

Swapping both for one tankless water heater is the other option we price out. It heats as the water flows, so a long shower doesn’t drain it, and it gives you back the floor space. We show you both prices side by side.

Quick answers

What people ask about homes with two water heaters

Why would a house have two water heaters?

To supply more hot water at once than one tank can, or to serve two ends of a big house.

If one of my two water heaters fails, do I replace both?

Not always, but they’re usually the same age. We check the second one and give you the choice in writing.

Can I replace two water heaters with one tankless?

Often, yes, if the gas line and venting can handle it. We check both before we price it.

How do I tell which of my two water heaters is bad?

Run the hot water, then carefully touch the hot pipe on top of each. The one that stays cool, or has water under it, is the one.

Who replaces water heaters in Northern Virginia?

Call SwiftPro at (703) 997-9757. Our own plumbers replace tank and tankless water heaters across Northern Virginia.

Seeing this at your house?

Tell us what you’re seeing. We’ll tell you what it is and what the fix costs, in writing.

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Want us to take a look at yours?

Tell us what you’re seeing. We’ll give you a time and a price in writing before any work starts.

SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
Virginia Class A contractor license #2705192276

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5.01,130 reviews