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<p>[QUOTE=&quot;-jeffB, post: 8332231, member: 27832&quot;]I know water dissolves lots of things, and I know about the <a href="https://en.wikipedia.org/wiki/Common-ion_effect" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Common-ion_effect" rel="nofollow">common-ion effect</a> (and a lot of exceptions to it), but I&#039;m not aware of anything that makes water that&#039;s 0.01% saturated with a particular salt somehow more viciously corrosive than water that&#039;s 0.1% saturated.</p><p><br /></p><p>People use special containers and plumbing for ultra-pure water, because if they use regular fittings, the water will dissolve a tiny bit of the container -- <i>and then it isn&#039;t ultra-pure any more</i>. But it doesn&#039;t dissolve any <i>more</i> of the container or fittings than plain old tap water. Does it?[/QUOTE]</p><p><br /></p>

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