Green stuff on copper pipes
All of a sudden my outdoor taps are leaking and changing the washers doesn't help. The seats are corroded. And now there is a whitish green build up on all the valves and fittings and green stains on the concrete where the taps were leaking.
I occasionally get a mild shock when I turn on the outside tap in my bare feet and now I'm wondering if there is any chance there is some sort of electrolytic action going on between the stray current and the dissimilar metals of the taps.