It would help to know more about your water test results. What do you mean 'air-borne' bacteria and how was this determined? What do you consider 'considerable"?
If you have iron, chances are you have hard water to a point that the calcium will also contribute to membrane failure. I wouldn't recommend an RO on more than 0.05 ppm iron. More will shorten the life of the membrane in relation to the total amount and volume of water used. There are ROs that have automatic membrane flush systems and these great increase the life of the membrane.
In the majority of cases, a softener will handle both calcium and iron (ferrous iron) which will give the RO excellent results. There may be other types of iron and this needs to be clarified before any water treatment equiment installed.
Andy Christensen, CWS-II
Last edited by Andy CWS : 01-21-2009 at 07:10 PM.
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