Abstract: An apparatus and a method for removing air from a collapsible plastic structure having known characteristics of flexibility and curvature. The apparatus is a hollow cylindrical plastic tubing having interior and exterior surfaces, the interior surface defining a flow path for a fluid. The exterior surface of the tubing is formed to have a selected number of ridges defining valleys there between, the ridges extending for a selected length of tubing. A plurality of perforations are formed in the valleys, and extended a selected length of tubing for providing a plurality of additional flow paths to the interior of the tubing.

Abstract: The invention describes an airflow adapter for a blower having an outlet duct, and which includes a closed, substantially tubular conduit having an mating section and an exit cylinder, the mating section shaped to mate with the outlet duct of the blower, and having selected geometry to complement the cross-sectional geometry of the outlet duct of the blower, and wherein the exit cylinder has a circular cross-section. Intermediate the mating section and the exit cylinder is a transitional chamber providing a continuous flowpath between the mating section and the exit cylinder. The invention also includes abutment means adjacent the mating section for aligning the adapter relative to the blower. The adapter has a longitudinal axis parallel to the flowpath of a selected length along its longitudinal axis such that the combination of the transitional chamber and the exit cylinder is configured to eliminate air separation from the internal surface of the exit cylinder.