Abstract: A length of corrugated tubing is (B) inserted into a bell (C) having an open end 42. The corrugated tubing is defined by alternating annular portions peak (22) and valley portions (24) and a cylindrical inner wall (26) connected with an inner surface of the valley portions. Annular chambers (28) are defined between the cylindrical inner liner and each peak portion. The bell has a stop (10) and a cylindrical side wall (40) with a groove (44) for receiving a gasket (30) that is disposed in one of the tubing valleys. The groove is constructed an integer number of peak and valley portions from the stop such that the gasket aligns with the groove when an end of the tubing length abuts the stop. A plurality of latch elements (60) are disposed an integer number of peak and valley portions from the gasket receiving groove toward the bell open end. The latch elements extend into another of the valley portions and engage a corrugation side wall to transfer axial uncoupling forced from the tubing to the bell side wall.

Abstract: A coupler (A) defines a bell (C) having a cylindrical wall (40) of substantially the same inner diameter as an outer diameter of peaks (22) of a length of corrugated tubing (B). The corrugated tubing includes a gasket (30) received in a valley (24) near one end thereof. The gasket includes a flange portion (32) which is compressed into the valley by the side wall (40) as the end of the tubing is slid into the coupler (A). The coupler includes an annular groove (44) which is in alignment with the gasket when the inner end of the tubing engages a stop (10). The flange is resiliently biased outward into groove (44) where an outward facing groove engaging surface (46) of the gasket engages an inward facing gasket engaging surface (48) of the groove. The gasket may include a stiffer higher durometer rubber portion (52) for biasing the flange more stiffly into the groove and to transfer axial load to the bell more stiffly.