Originally Posted by sign guy
why cant you drink deionized water
You can drink it, it just has no taste at all. All the Ca, flouride, and any other elements have been taken completely out of the water making it almost 100% pure. This is good and bad, depending on how you look at it. Ca of course, does a body good :thinking: , and most people would rather drink water with Ca in it. If your unit also has a DI, most suggest using only the RO portion for drinking water and bypassing the DI, to leave some "goodies" for your body.
To answer the first question, as long as it is completely seeled, it should last a very long time.