Just wanted to put the word out on TracPipe. Took the certification test yesterday, it was cake. TracPipe is fully compliant with the IFGC and they have underground rated pipe. Looking forward to doing future outdoor kitchens and fire features with this stuff. No more lugging sticks and a threading machine to jobsites. It's about 25% more expensive than sticks, but the time savings is huge. You have to be certified to buy it, so ask at your local retailer. Class is about an hour and then you take the test. Be sure you get the book, the tables are different from the IFGC. Good news is TracPipe has the same inside diameter as sticks, so flow is roughly the same overall. Just have to account for turbulence, which I think is a 12 to 15 percent factor.