An improved fluid drainage system is comprised of a transfer tubing that includes a secondary axial compartment for the movement of air. This secondary lumen of the transfer tubing includes a gas permeable material which will allow the transport of air, while repelling fluid. The secondary lumen transports air from any section of the transfer tubing to the collection bag, as a means of eliminating and equating pressurized air pockets that can result in flow retardation. The urinary drainage system of the present invention remains a closed system, but with an internal venting system to improve flow distally from the body.
