2 points here.
1/ By filters do you mean the sediment filter and the carbon filter, if so then, surely you are risking bacterial contamination of your water due to build up in these filters of ie; legionnaires.( thinking about it the legionnaires thingy may be present in the pre filters as suggested, but the ro is supposed to take out bacteria and viruses in the normal course of its work).
2/ can't remember now. LOL
Steve