Apparatus and method for providing gases to a user

A connector assembly comprising:

• a tubing flange comprising a proximal end and a distal end, the tubing flange configured to connect to an end of a tube at the proximal end of the tubing flange, the tubing flange comprises a head portion at the distal end of the tubing flange and a tapering neck portion extending from the head portion to the proximal end, the tubing flange defining a gas passageway through the head portion and the tapering neck portion;
• an inner sleeve comprising a distal portion and a proximal portion, the proximal portion of the inner sleeve comprises a plurality of slots, wherein each of the plurality of slots extends distally from a proximal end of the inner sleeve, the inner sleeve comprising a receptacle sized and configured to receive the head portion of the tubing flange, the receptacle comprising a shoulder configured to abut the distal end of the tubing flange, wherein when assembled, an inner wall of the receptacle provides an interference fit with an outer surface of the head portion;
• an outer sleeve mechanically secured to the inner sleeve such that the outer sleeve and inner sleeve are locked together,
• wherein the inner sleeve and the outer sleeve form a mechanically mating retention system configured to lock onto the tube.