Copper Plumbing...?

[newgeek]

I believe the water must remain in contact with the copper for a number of hours (for some reason 8 - 10 come to mind) before it picks anything up from it, if you house is anything like mine 2 kids, 2 dogs, 2 wives errr 1 wife the water is always moving through the pipes. My house is also 75 years old so the supply pipes are cast and copper and I have no problems with my tank. I do have a ro/di system.
Hope that helps a little,
Kelly