Bru'n Water - RO vs Distilled vs DI

[srice]

I have finally given up on my local water supply. I live in a small town with it's own water system which draws from multiple sources. My water chemistry varies by month and by amount of recent rainfall. I've realized that I am chasing a moving target and made the decision to go ahead and buy a RO/DI system. Looking at Bru'n Water, I see that there is a difference between RO and Distilled water. I have a DI stage at the end of my water system. Should I still use the RO selection of go ahead and pick the Distilled selection?

 

[mchrispen]

If your filter has the DI stage, then effectively you are removing all of the ions... I would use the DI selection.

 

[ajdelange]

It isn't going to make any practical difference. If your source water is very high in minerals such that even with 95 - 99% rejection there are concentrations over, say, 10 mg/L then use the actual numbers. If you have 1 - 5 mg/L of this and that just use 0 for everything which is what a DI water profile should indicate. DI water does have alkalinity of about 2.5 mg/L but as that is pretty small you can just use 0 for that too as I doubt most spreadsheets/calculators account for it.