On Wed, 04 Nov 2009 17:18:48 -0500, wrote:


A quote:

Natural gas in copper pipe over some period of years causes copper
sulfites which clogged up the pipe with hard, black crystallizations.

It also appears that the sulfur added to the natural gas is corrosive
to copper.

Sulphur is NOT added to Natural gas. Sulphur in natural gas is
naturally occurring, and is largely removed by processing before
distribution.
Ethyl Mercapitan is added in VERY small amounts as an identifier
odour.