I was just participating in a discussion in a Facebook group about LPG (propane) systems in campers and there were a few people sharing some scary advice. If you're considering installing propane in your camper, do your homework based on the RV industry standards and NOT what a building contractor (residential or commercial) would do. An RV endures a lot more stresses (temperature, vibration) than a static installation in a house or other structure.
Here is a link to the 2012 RVIA LPG systems in RV's: http://tearjerkers.net/forum/attachm...2012%20LPG.pdf
Yes, its an older document, but the general information hasn't changed much over the years. I also have the 2000 LPG document if anyone is curious.