10-18-2009, 03:35 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 5,307
Thanks: 0
Thanked 148 Times in 143 Posts
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black pipe and galvanized are almost the same - the base material is iron or steel. electrically in active. dissimilar metals are active - zinc/copper, brass/copper etc. when running a gas pipe through concrete it must be sleeved. lazypup has all the answers for gas pipe etc. the sleeving can be sealed with expanding foam. [urethane]
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