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Keep Open Expansion Tank?

Steamhead
Steamhead Member Posts: 17,342
in THE MAIN WALL
on an old gravity hot-water system. This system still has an open expansion tank, in a third-floor bedroom, and for several reasons disconnecting and removing it will not be easy.

I'm leaning toward just putting an air separator in the basement along with the new boiler and circulator, and keeping the open expansion tank and manual feed. Can anyone think of a compelling reason to not do this?

Thanks in advance, as always.

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Comments

  • Bob Bona_4
    Bob Bona_4 Member Posts: 2,083
    just did one

    like that. I was able to diconnect the pipe to the attic tank from the basement. You can't even lop off or plug the line to the tank? My thoughts are that with the closed system, you will have better control over pressure and the benefits that go with it,and less for the homeowner to worry about. Less O2 infiltration? What if the tank rusts out and leaks up there?
    A possible down side is that with constant, consistent pressure, fittings that didn't leak before, might just decide to do that. Ask me how I know this:)

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