Hi all I posted this in mods but got no responce feel free to move it wherever its best suited we have had reverse osmosis systems in our last 2 trailers and our home before we started our full time life we really enjoy boondocking but if we dont turn off the R.O. we can only make 3 or 4 days before we suck the fresh water tank dry we can get 7 to 10 days with it shut off I found on the Rv water store web site that they have A kit that will return the excess water used from the system back to the fresh tank. Some time back I designed A system where the excess water would go into A second fresh water tank and than we would use it for showers toilet washing etc. but it was going to be expensive to do what are you alls thoughts on returning the excess water back into the fresh tank. thanks Fred