I've heard about this Kold Ster-il unit, and that it does not produce wastewater. Can you help me understand the difference in the processes, and perhaps suggest which might work best?

Either system would come after my water softener, and in this, I use potassium chloride rather than sodium chloride as the agent to wash/renew my resin bed. Thank you for your input! Dave If it bothers you to "throw away" so much RO waste water (a ration of 4-5 to 1 of usable is not uncommon) than I would go the contactor route.

In all fairness though, do take a look at your ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.