500 Gallon Propane Tank, New & Certified

This listing covers the 500-gallon propane tank in both above-ground (AG) and underground (UG) configurations, both built to ASME Section VIII, Division 1 code and Class 150 certified, meaning that once installed and connected, the tank becomes a fixed, non-portable installation. The above-ground version has an elliptical head, measures 9 feet 10 inches long with a 37.5-inch outside diameter, stands 3 feet 11-1/2 inches tall (15-inch leg width, 5-foot leg spacing), and weighs approximately 920 lbs empty. The underground version has a hemispherical head, the same 9-foot-10-inch length and 37.5-inch diameter, a 5-foot 9-3/8-inch riser height, and weighs approximately 953 lbs empty. It ships with a Valspar Q-thane ready-to-bury coating engineered specifically for underground corrosion resistance and long-term durability. Filled to the standard 80 percent safety level, either configuration holds approximately 400 gallons of usable propane. Typical uses include whole-home heating, pool heaters, backup generators, and commercial applications such as cooking, dry cleaning, and crop drying — generally recommended for homes in the 2,500 to 4,500 square-foot range. Above-ground installation avoids excavation costs; underground installation keeps the tank out of sight and protects it from surface weather extremes, since it draws on the more stable temperature of the surrounding earth.