FAQs: Water Heaters

I am replacing my water heater; am I required to have an expansion tank?

Most water heaters in Fairfax County homes do not require an expansion tank. However, if you have a check valve, backflow preventer, pressure reducing valve or a pressure increasing pump, you may be required to have an expansion tank. Learn more about expansion tanks and where they are required.

More Questions?

Please contact Building Plan Review via e-mail or call 703-222-0114, TTY 711.

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