Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
Today a lot of places use a vinyl type tubing approved for gas.
It's called CSST. I think it's Coated Stainless Steel Tubing and it's used for gas a lot. It does have special connectors and tools, but is pretty much accepted every where. Still has to be sized properly.