America has a gas with AmeriGas Partners. Purveying propane has propelled the company to its position as the top US retail propane marketer (besting Ferrellgas). It serves more than 2 million residential, commercial, industrial, agricultural, motor fuel, and wholesale customers from 2,000 locations in 50 states. AmeriGas also sells propane-related supplies and equipment and exchanges prefilled portable tanks for empty ones. The company stores propane in Arizona, California, and Virginia and distributes its products through an interstate carrier structure that runs across the US and in Canada.