I have a 120 gallon liquid propane tank on the side of my house. It has 1/4 flexible copper tubing running to the basement hot water tank and the kitchen stove. Both appliances are on the same side of the house as the tank. I want to run a pipe across my basement to the opposite side of the house to create a propane outlet for my generator and grill. Can I use black steel pipe for this ? About 30 feet of pipe? Would I use 1/2” pipe or something smaller ?