Abstract: This invention includes an above ground compressed gas storage vessel of ular or cylindrical configuration. A plug assembly is inserted into the tube and retained therein by a tri-part ring positioned within a groove of larger internal diameter than that of the tube and retained together with said plug. O-rings or a singular packing assembly would be used to seal the plug to the internal diameter of the tube to prevent the escape of gas. A plurality of cylinders are secured in a parallel arrangement using a support structure to increase gas storage capacity while taking up a minimal amount of ground space.