i suppose you could drink from ro before going into resin.
trouble is drinking after resin there would be a good chance of being ill due to bacteria, micro-organisims.
chlorine is in the water as you probably know to inhibit legonaires disease, the bacteria is always present in tap water, hence the need for chlorine.
there is know benefit of drinking ro-water as everything has been taking out as said.
As for washing in i'm not sure; i know my mrs says her hair always seems nicer on hols in spain, soft water less shampoo needed etc.
I don't have this prob with my hair, don't need much shampoo wherever i am
