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Question DetailsAsked on 5/13/2015

Does Arlington County, VA require installing an expansion tank when replacing an electric water heater?

I have a TH built in 1967 and an electric water heater that is 32 years old. in anticipation of needing to replace it, I heard that some Virginia jurisdictions were requiring that an expansion tank also be installed when replacing the water heater.

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Yep - Baltimore, DC, Fairfax County, Arlington County at least in your area do require a backflow preventer be installed on the cold water line, which then means you ahve to have the expansion tank so you don't pressure the piping and heater up when it reheats without any hot water being used.


Several prior responses to questions about backflow preventers and expansion tanks and typical costs can be found in the Home > Water Heater and Home > Plumbing links in Browse Projects at lower left, or put those terms into the Ask box for suggested links to some of them. Several of them are shown right below this question.

Answered 4 years ago by LCD




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