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Rain water chemistry

Discussion in 'General Brewing Techniques' started by Bellyup, 24/4/19.

 

  1. Bellyup

    Well-Known Member

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    Posted 24/4/19
    I ask the question even though the answer would seem simple.....
    Are there any chemical assumptions to make when inputting rain water into some of the brewing water calculators for brewing.
    For me it would be inland rain onto a Colourbond roof then into a Poly tank.
    Thanks,
    Bruce
     
  2. razz

    Pro Pro

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    Posted 24/4/19
    Hi Bruce, for my rainwater I just use the available data from the local water authority report and use those values in Brewers Friend software.
     
  3. Bellyup

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    Posted 24/4/19
    Hi Razz
    Thanks for the reply
    My water supply doesn’t list anything other than tap water......
     
  4. An Ankoù

    New Member

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    Posted 24/4/19
    Hi Bruce,
    I use rainwater from time to time. Let it rain for half an hour to clean the air and clean the roof. Treat the water you collect thereafter as chemically pure water. It isn't, but for brewing purposes it's good enough. Use it within 36 hours and keep it out of direct sunlight.
    Great for Czech pilsner!
     
  5. Bellyup

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    Posted 26/4/19
    Thanks An,
    I sought of thought that....... good to get another opinion.
    It's great to have access to this forum and knowledge.... you guys rock!
    Thanks,
    Bruce
     

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