Thanks Bob. So, in a roundabout way, you answered Greg's question ("What kind of gas piping is this?". The answer is, it's aluminum, and shouldn't be used outside like that. Right?
Plus you gave a ton of other useful info, as usual.
I'm easily confused.

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Illegal aliens have always been a problem in the United States. Ask any Indian. -Robert Orben, magician and author (b. 1927) / www.ArnoldHomeInspections.com