A swivel elbow and connector assembly for a patient interface system includes a ring (128) configured to be sealingly secured in an aperture of the patient interface system and an elbow (125) swivably secured in the ring (128). The ring (128) includes a first side (128(1)) in an interior of the patient interface system and a second side (128(2)) at an exterior of the patient interface system when the ring (128) is secured in the aperture. The ring (128) comprises a first flange on the first side and a second flange on the second side, the first and second flanges defining a channel (128(3)) that sealingly engages the aperture of the patient interface system. An inner surface (128(4)) of the ring (128) is partially spherical and an outer surface (125(3)) of the elbow (125) is partially spherical and the elbow (125) and the ring (128) form a ball and socket connection.
