HELP.. My RO-DI water electrocuted me

[Tarolisol]

I think it stopped, For the first 3 buckets or so whenever i put the copper wire in to ground it i would get a huge shock now it has seemed to stop, although im not goin to use my finger again to make sure. I dont know where it could be coming from maybe just because its a new unit it need a little time to get rid of all the built up static. Well ill invite some poor friend over and get him to stick his finger in to check next time. Ill never forget the first shock, ive never felt anything like it, my entire body just jumped almost on my butt. I dumped that bucket though. .