Sorry to burst your bubble there MAg...but Chloramine is a different compound than Chlorine... about 80% of municiple water systems use Chloramine now...it is cheaper and doesn't degrade like Chlorine.. Chlorine migrates and biodegrades over time...Chloramine does not... both will kill a membrane and the Activated charcoal filter elements remove both..if you don't change the AC filter before they fill up with bad chems, your membrane will surely die an early death due to bio and precipitate fouling. COntrary to popular belief, chlorine does not react with the membrane...it just increases fouling, especially from hard water.. flushing once a week is important to maintain an RO system. If you have a water softner ahead of your RO/DI unit, it will great increase the life of the membrane....

techy stuff here

http://www.gewater.com/pdf/TechNotes...20Analysis.pdf