Several years ago something similiar occurred in houses near a utility substation when the local electric utility had a system fault. Seems that the copper water lines were making contact with the reinforcing mesh in the concrete foundation slabs. One theory was that the fault somehow induced a a difference in potential between the mesh and the pipe, which burned a hole in the pipe where it contacted the mesh. I understand that it is a code violation for the pipe to be in contact with the mesh. I believe the homeowner's insurance paid the damages. Mike
|