Pressurized gas containing system

A mounting ring for use with (i) a cowling, (ii) a container of pressurized gas having a central axis and a neck defining an opening along said central axis and extending to an upper end and (iii) a valve or flow regulator, said mounting ring having a bottom wall perpendicular to said central axis, a circular outer ring extending substantially parallel to said central axis from a lower end adjacent said bottom wall to an upper end, said ring having threads engaged to a cowling, said bottom wall extending inwardly toward said central axis, a tapered wall section extending inwardly and upwardly from said bottom wall, said tapered wall section having a plurality of spaced apart apertures, a top extending from said tapered wall section toward said central axis, said top having a lower surface engaged to a neck upper end and a center hole for receiving said-valve or flow regulator.