I thinkthe plastic linings in common use are the reason for the grounding - the old metal-to-metal ones self grounded through the CW feed.
The comment about pitting reminds me of when I replaced the short 'jack leg' run to a water softener that had been installed in my mom's house by the previous owner.
Die-electric? Whazzat? Why would I want to kill the electric?
I'll jest connect the copper to the old steel pipe - the threads match...
Of course, by the time I got in there, the 3/4" CU had in ID of about 3/8" due to calcifications... took me a whopping 15 minutes to cut out the softener run and re-do correctly.
[This message has been edited by DougW (edited 12-19-2004).]
