I put up a 16 x 28 cabin this summer and will be working on the inside this winter. I bought 4 Mr Heater propane lights (cabin is remote) and was thinking I would use 3/8 inch Type L copper tubing ran between the studs to connect the lights to a 100 lb propane tank outside. However, I just had a coworker tell me that propane will react with the copper, causing the interior of the pipe to flake and clog the line in less than 10 years. He said it might be better to use black iron pipe.
Does anyone out there have any experience with using copper tubing for propane lights (or stove and refrigerator)? Any advice on what type piping would work better over the long term? Also, I would appreciate any tips you might have on how to run the piping and how you would bring the lines together to connect to the propane tank sitting outside. My cabin sits off the ground a couple of feet, so I was thinking of running the piping along the bottom of the joists before turning up into the wall cavities. Thanks!