I have a 2 year-old home with furnace and water heater fueled by a large propane tank. After the shut-off valve there is a tee with a plug on one side (1 inch pipe thread), and I was wondering how to add a line from this to a portable propane grill 55 feet away? I'm familiar with working with threaded pipe and tubing. Is galvanized or black hard pipe required, or can copper tubing (hard or soft) be used? What size pipe or tube is needed for a 55 foot run so I'd receive sufficient propane for cooking? I'd add an additional shut-off valve in this leg of run. I assume I need to keep the portable grill regulator in line. Is this a sensible thing to do, to avoid using those 5 gallon cylinders for propane? Any help or link would be much appreciated, and probably keep me from cussing. Thanks.