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From: cscussel@ihuxq.UUCP
Newsgroups: net.misc
Subject: Boiling hot water and mineral content
Message-ID: <295@ihuxq.UUCP>
Date: Mon, 15-Aug-83 13:53:25 EDT
Article-I.D.: ihuxq.295
Posted: Mon Aug 15 13:53:25 1983
Date-Received: Tue, 16-Aug-83 13:02:35 EDT
Organization: BTL Naperville, Il.
Lines: 13

Someone commented that hot water would have more mineral content, from the
tank and pipes. I don't see how this could be. Certainly mineral scale tends
to build up in the heater tank, but the very fact that it's building up in
the tank should mean that the hot water would have less mineral content.
Anyway, the hot water can't be higher in mineral content unless the header
(sorry, "heater") constantly adds minerals to the water, and the only
source of minerals is the incoming cold water. That is, the outgoing water
can't be higher in minerals than the outgoing water (unless the heater is
venting steam). The chemical nature of the minerals may be changed by the
heat, possibly making them more noticable. Certain kinds of minerals
precipitate when the water is heated, but this presumably would occur in
the heater and again results in water with a lower mineral content.