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Old hot water tanks for thermal storage?

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by arngnick, Mar 1, 2013.

  1. arngnick

    arngnick Member

    Joined:
    Feb 15, 2013
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    Loc:
    Mansfield, PA
    I have access to alot of free electric hot water tanks is it a good Idea to plumb these together and use them for thermal storage? (In my case I am just trying to add capacity)

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  2. bmblank

    bmblank Minister of Fire

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    Jan 17, 2013
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    Michigan
    Can't hurt, in my opinion. As long as they don't leak. I probably wouldn't use them for pressurized storage though. Just a bunch of hassles that go along with pressure vessels. Each one should have expansion to go along with it i would think.
  3. Karl_northwind

    Karl_northwind Member

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    Feb 13, 2012
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    Loc:
    Central Wi.
    just know that they will most likely have lots of lime and gunk in the bottom that you may be introducing to the system.
    karl
    Taylor Sutherland likes this.
  4. maple1

    maple1 Minister of Fire

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    3,851
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    Nova Scotia
    I'd be a bit leery - questionable water quality can really put a kicking into a DHW tank. They are typically used under higher pressures than a storage setup (like, twice as much), but not temperatures that are as high.

    Any 110 gallon propane tanks around you? There's a mountain of them an hour away from me. They fit almost anywhere, 30" diameter x 4ft. tall.
  5. arngnick

    arngnick Member

    Joined:
    Feb 15, 2013
    Messages:
    244
    Loc:
    Mansfield, PA
    Based on the comments here I will just stick to propane tanks. No need to risk using old DHW tanks if one were to fail that is alot of water that would be in my basement. I just need to find some good deals on old propane tanks they are neot that easy to find around me. I can travel about 3 hours and get them though.

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