Abstract: A transition fitting includes an exterior casing and a flexible fluid conveyance tube at least partially disposed radially interior the exterior casing. A stiffener is radially interior the flexible fluid conveyance tube. A first crimp extends radially interior from the interior surface of the exterior casing. A first annular retention device extends radially between the flexible fluid conveyance tube and the exterior casing and engages the first crimp. A gasket is disposed axially between the first annular retention device and a second annular retention device. A second crimp extends radially interior from the interior surface of the exterior casing and engages the second annular retention device. The second crimp secures the gasket between the first and second annular retention devices such that the gasket forms a fluid tight seal between the flexible fluid conveyance tube and the exterior casing.