whats a good ro/di brand??

Are you asking for a brand of bottled water or are you asking about an RO/DI filter?

Nancy

sorry whats a good RO/Di water filter

I've always been partial to Sedona Springs or Aquafina...because they have the sports bottle tops. :D just kidding...
There are so many producers of ro units now that there is somewhat of an industry standard, and brand names are only associated with sales deals or upkeep/maintenance programs...
It really doesn't matter too much which brand, just get one that you can get replacement filters from locally...being able to shop near you is key !
Greg

I'm cheap and got a "bare bones" filter for $150, it's not great but it does the job.