A connecting assembly (254, 854) for coupling to a tubular wall (290, 390), comprising: a connecting fitting (260, 860) having a tubular coupling portion, an abutment ring, and an arcuate-shaped tubular body, the tubular coupling portion having first and second ends, the abutment ring being disposed around an outer surface of the tubular coupling portion a predetermined distance from the first end of the tubular coupling portion, an end of the tubular body being coupled to the second end of the tubular coupling portion; a retaining member (262, 862) having a ring-shaped portion and first and second finger portions (610, 612) extending in a first direction from the ring-shaped portion, the ring-shaped portion defining a central aperture, the arcuate-shaped tubular body of the connecting fitting (260, 860) being received through the central aperture of the ring-shaped portion such that the ring-shaped portion is slidably disposed on the tubular body of the connecting fitting (260, 860) and is further slidably disposed against the abutment ring, a diameter of the central aperture being less than a diameter of the abutment ring, the first and second finger portions configured to removably hold the connecting fitting (260, 860) against the tubular wall (290, 390), wherein - the arcuate-shaped tubular body of the connecting fitting (260, 860) has a 90 degree bend therein, - the arcuate-shaped tubular body has first and second circumferentially disposed ledges extending outwardly from an outer surface of the arcuate-shaped tubular body; characterized in that - the retaining member further includes tabs (614, 616, 618, 620) that extend inwardly from the ring-shaped portion into the central aperture. a connecting fitting (260, 860) having a tubular coupling portion, an abutment ring, and an arcuate-shaped tubular body, the tubular coupling portion having first and second ends, the abutment ring being disposed around an outer surface of the tubular coupling portion a predetermined distance from the first end of the tubular coupling portion, an end of the tubular body being coupled to the second end of the tubular coupling portion; a retaining member (262, 862) having a ring-shaped portion and first and second finger portions (610, 612) extending in a first direction from the ring-shaped portion, the ring-shaped portion defining a central aperture, the arcuate-shaped tubular body of the connecting fitting (260, 860) being received through the central aperture of the ring-shaped portion such that the ring-shaped portion is slidably disposed on the tubular body of the connecting fitting (260, 860) and is further slidably disposed against the abutment ring, a diameter of the central aperture being less than a diameter of the abutment ring, the first and second finger portions configured to removably hold the connecting fitting (260, 860) against the tubular wall (290, 390), wherein - the arcuate-shaped tubular body of the connecting fitting (260, 860) has a 90 degree bend therein, - the arcuate-shaped tubular body has first and second circumferentially disposed ledges extending outwardly from an outer surface of the arcuate-shaped tubular body; characterized in that - the retaining member further includes tabs (614, 616, 618, 620) that extend inwardly from the ring-shaped portion into the central aperture. - the arcuate-shaped tubular body of the connecting fitting (260, 860) has a 90 degree bend therein, - the arcuate-shaped tubular body has first and second circumferentially disposed ledges extending outwardly from an outer surface of the arcuate-shaped tubular body; characterized in that - the retaining member further includes tabs (614, 616, 618, 620) that extend inwardly from the ring-shaped portion into the central aperture.