what i've learned and been told is,,,if you have city tap water and your RO system was made for city water you ought to be ok,,,Chloramines where introduced in the water systems to stay in the water longer,,when chlorine was just used in the "old days", us old timers
used to just leave water out for a few days so the chlorine could dissipate from it. i have well water where i'm at now,and use a TFC membrane in my RO/DI (no chlorine in my water) the other type of membrane used for "city" water is supposed to remove the chlorine/chloramine in you water(forget the name on this membrane)so as far as i believe, you ought to be ok when the change is made to your water,perhaps a membrane replacement might be a good idea, hope i helped,,,,,
