Most people who buy RO units from Ro-man are buying them to produce filtered drinking water. But that doesn't mean you can drink it from your tank.
Your tanks are not sterile and neither are your hoses which drag across the ground in all the dog mess, bird mess, cat mess, fox mess etc.
Best not to chance it . There is a world of difference between chemically pure and sterile.
I know of a bloke who lives near me, he is 28 and contracted Vile's disease while working as a builder. He nearly died, perhap from his point of view he would have been better off if he had. He's now in a wheelchair for life, paralysed, double incontinent and depressed beyond words. He has a wife and a young family but no chance of ever getting any better than he is now.
There are some SERIOUSLY nasty bugs out there.