[ldzielak]

My Kent system also recomended not drinking the water after the DI filter. My best guess is the water is too pure:
I worked with a fellow who used to head the Ultrapure water plant for Intelin CA. They use Ultra pure water to stop & clean the CPU's between each etching process. If the water was not pure enough, the etching reaction to take too much of or it could leave too much debris behind. So in the end they had bad chips if the water was not pure enough. The explanation was if water is so pure, it will absorb very well any ions. Maybe something like this happens when we drink the water. Just a guess.....

Lee