On Sat, May 05, 2012 at 10:04:49PM +0200, Kresten Buch wrote:
> Hvad er det gode argument for ikke at bruge almindelige kuglehaner fra
> et byggemarked, til sit bryganlæg? Hvorfor skulle de afgive mere
> messing til urt, end til det drikkevand de er lavede til ? Og er
> messing i øvrigt mere giftigt en kobber?
>
> Der har været skrevet om det før, men den eneste forklaring jeg kan se
> der er givet er, at der er zink i messing, men udfældes det i højere
> grad til varm urt end til varmt vand?
I don't know that much about chemistry, but my first thought is that beer
wort is clearly more acidic than plain water, so it can leach out more
metals. I have heard that the yeast actually needs some copper to do its
work, so that should not be so bad. On the other hand, I have heard people
saying that there is a real difference between brass and steel taps for
serving the beer, so maybe the metals make a bigger difference at that point.
When it comes to it, I think the metals in your piping are a fairly small
detail. Nothing to worry about, until you can make pretty perfect
beer anyway
-H
--
Heikki Levanto "In Murphy We Turst" heikki (at) lsd (dot) dk
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