there's still galvanized 4'' mains running in that building:eek:
The funny part with Doheny Towers is I think there may have been 15 or 20-years between when we worked there.
In my 40 years of copper tubing water systems work there has been so many electrical ground wires clamped to the copper lines and also iron pipe with no real di-electric fittings installed.This is one of the best ways to dissolve copper!Most of the time the clamp and ground wire was aluminum.I have p-ssed off numerous electricians by demanding that they use a copper groundrod , in the earth,near their breaker box instead of clamping my copper tubing.I even had a customer complaining about being shocked everytime he used the shower while touching the showerhead! Everyone thought that he was hallucinating since he had just been released from the hospital after having surgery.I checked it out with a volt-meter with one probe on the showerhead and one on the electrical outlet plug ground and got 60 volts.Yikes! This is another arguement for PEX pipe!