Expansion Tank

Old 02-14-09, 05:55 PM
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Expansion Tank

Quick question. Is a expansion tank needed on new water heater installations?
Old 02-14-09, 06:53 PM
Join Date: Mar 2000
Location: Arlington, WA
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Depends on where you are at (what your local code requires) and whether your hot water system is 'open' or 'closed'.

They are not required where I'm at (No. CA), but in a few jurisdictions around where my Mom and sister live (Western WA) they are, (or are at least they are recommended.)

Best bet is to ask your local bldg. dept. That way you get the right answer for the jurisdiction that you are in.

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