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On 21 Aug 2005 10:46:41 -0400, (Scott Dorsey) wrote:
>Aloke Prasad > wrote:
>>RO water wins hands-down in my taste tests.
>>
>>We have a RO system installed and I take the water with me to work (to brew
>>my morning cup of tea). The local tap water at work is hard and produces
>>horrible tasting tea (and coffee).
>
>As I recall (and please correct me if I am wrong), these systems do not
>actually purify water, they just replace one kind of ion with another kind.
>So your water is still just as impure, only in a less problematic way.
>
>This means the water that comes out of the machine is as soft as the water
>going in was hard. The harder the input, the softer the output.
>
>If your original water contains iron, which makes tea really nasty, anything
>you can do to it will be a huge help.
>--scott
What you are describing is water softening, an ion exchange process.
RO, however, is a process in which water is forced through a
semi-permeable membrane, thereby removing contaminants that won't fit
through the membrane. It is water purification.
- --
Anthony
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