Ken wrote:
Saw the black pipe for water question, how about the other way around?

My house has some galvanized pipe used for gas. Have had some opinions
that the gas would corrode this pipe and only black is appropriate.
The city indicated that using galvanized for gas was not a code
violation though.

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Check Out
http://www.keidel.com/mech/pvf/pipe-galvanized.htm

Hope this helps,
William