I just bought a small propane furnace for my camper. It runs off propane and 12 volt for the blower. It is manufactured in the UK. Propex is the maker. My question is this. I need to go from a propane tank through a regulator to 5/16 copper tubing into the furnace. Should I get some custom hose built that has the propane tank fitting, regulator and some kind of compression fitting that would attach to the 5/16 copper tubing or is there an easier way. I was thinking that I cold take a BBQ grill hose and regulator assembly and find parts in Home Depot to get from that connection to the 5/16 but I was sorely mistaken there. Apparently 5/16 isn't that common so fittings for it aren't either. Also not sure what that thread size that is on the BBQ hose assembly but I couldn't find anything that matched those threads. Any help would be greatly appreciated.