What is the problem with copper and brass gas connectors?
In the “old days” it was not uncommon for natural gas to contain hydrogen sulfide in concentrations high enough that it would degrade the copper. Federal regulations now limit the amount of hydrogen sulfide to a level that won’t adversely affect copper. Despite that copper is still not allowed by many inspectors, PG&E, etc. The brass connectors that were once available have a different sort of problem. Some of them used a solder joint that is prone to failure. The consumer product safety commission issued a warning about them here.
