Installing a natural gas barbecue will require that you also install a natural gas line that supplies fuel to your barbecue. Before buying or installing your pipe, you'll need to know the diameter of the pipe and how far you'll be able to run it.
Diameter and length of pipe that supplies the gas to your grill will determine gas pressure at your barbecue. For example: gas delivered at the rate of 934 cubic feet per hour will require a 2-inch pipe no more than 100 feet long. You should also take into account the number of barbecue burners to be used and local gas company gas pressure.