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  1. #1
    Member mzee's Avatar
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    Question Using water from dehumidifier in battery

    My dehumidifier produces a lot of "distilled water".
    The water probably has a lot of bugs in it, but would it be Ok to use in lead acid batteries? Got to be better than tap water.

  2. #2
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    Default Re: Using water from dehumidifier in battery


  3. #3

    Default Re: Using water from dehumidifier in battery

    Can't be too much wrong with it. As you say, it is most probably quite close to distilled water.

    While battery manufacturers recommend using distilled water, I have used tap water for the last 40 years or so and have had no worries at all, so using water from a dehumidifier can't be all that bad.

    I don't think that the bugs will have drunk too much of the water but it makes sense to strain the water before use.
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  4. #4
    Senior Member Paul.Cov's Avatar
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    Default Re: Using water from dehumidifier in battery

    Wish I'd thought of it when I last needed some. I also reverted to the tap water. The dehumidifier, apart from traces of dust should be great.

  5. #5
    Senior Member Bobh's Avatar
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    Default Re: Using water from dehumidifier in battery

    I have caught rainwater in a plastic bucket.
    Windows 10 Home 64-bit, Intel Core i3 540 3.07GHz, 8 GB Dual-Channel DDR3, Gigabyte H55-USB3, Nvidia Geforce GTS 450, Hauppauge WinTV-HVR-3300

  6. #6
    Senior Member Lawrence's Avatar
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    Default Re: Using water from dehumidifier in battery

    You can buy distilled water for batteries from Supercheap

    When I changed the coolant in one of the cars,was advised to use deionised water which also was available at Supercheap

    Even topping up your coolant ,you should not use tap water either

  7. #7
    Frank and Earnest. Cicero's Avatar
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    Default Re: Using water from dehumidifier in battery

    Quote Originally Posted by Lawrence View Post
    You can buy distilled water for batteries from Supercheap

    When I changed the coolant in one of the cars,was advised to use deionised water which also was available at Supercheap

    Even topping up your coolant ,you should not use tap water either
    You mean, don't be like everybody else.?
    "The life of the dead is placed in the memory of the living." Cicero

  8. #8
    pcsourcepoint
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    Default Re: Using water from dehumidifier in battery

    Though water becomes more pure, I think, if it's also deionized/filtered through a cationic exchanger, since some water can be soft or hard, depending on presence of certain ions. Some domestic water chillers seem to have filtering beads.
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