Originally Posted by hokenfloken
Thanks for the wikipedia link, although I have read it already. I guess my question whether or not any of the salt ions are smaller than 0.1 nm. If they are larger, they will be filtered out. If not, they will pass though, or at least that's my interpretation. If RO water is essentially free of ions then what is the point of distilled water? Thanks.
RO doesn't exclude particles solely on the basis of size, so your interpretation isn't quite correct.
The answer to your question is that the water will not be ion free, there will be lower ion content than there was before, it will probably be very low (single digits ppm for each ion), and it is impossible to predict exactly what it will be.