Who Is Universal Cylinder Exchange? Founded in 1998, from its initial customer bases located in Southern California and Oregon. The company has grown to eleven Western States. We service the Western States Through Universal Cylinder Exchange owned and operating propane warehouse facilities, we fill, refurbish, and deliver to the company's display at retail locations. This allows consumers throughout the Western United States, a safer and convenient way to purchase or exchange cylinders. Propane gas is a $9 Billion dollar a year industry in the United States and is still growing. It is estimated that there are over 40 million gas grills in the United States, of which 100 million are used per year. Three out of four households own barbecue grills, in which 70% are propane. The "backyard barbecue" or end user of the 20# lb. cylinder is the American public. The patio heater industry is experiencing a rapid growth as well. The propane cylinder exchange program is the new and safe way to exchange or purchase cylinders.