All good advice. I like black pipe and have used it before, but in
this case it is beyond my DIY capabilities. Can't cut & thread pipe
to the needed lengths.
Why not a combination of pipe and copper?
1) Which grade of copper would I use?
2) Is CSST suitable for outdoors? e.g., to run along an outside wall?
3) If so, then
a: Where can I get the flex? The plumbing guy at Home Depot
never heard of it. Our local plumbing supply house treats DIYers
like the scum of the earth.
b: Is it code approved in most jurisdictions? Everyone
around here [NH] uses copper.
c: What is the cost difference for about 65 feet?