afforded locations with resilient bending the degree of resilient bending is a question of optimal design and it may be that embodiments of the connector 16 may have only one location or more than two locations that are afforded resilient bending in cross sections including axis c the aperture 11 in the pipe 39 s wall 14 has a dimension d 1 that is the diameter of the aperture 11 when the pipe 10 is in a lay flat state wherein the aperture 11 may have a circular form it is noted that when subjected to internal fluid pressure the aperture 11 may assume an elliptical shape when viewed along the axis c view not shown with the larger dimension of the ellipse being oriented along the pipe 39 s circumferential direction this is due to the fact that pipes under internal hydrostatic pressure typically experience larger stress in the circumferential direction as opposed to the longitudinal direction attention is drawn to fig5 a and 5b showing a partial view of an irrigation element in the form of a fitting 40 that is retained in the connector 39 s opening 22 as seen in the cross section of fig5 a under internal fluid pressure illustrated by short arrows 38 the pipe 10 expands outwardly and thereby the aperture 11 reaches an enlarged state at least a portion of the wing 20 is adapted to resiliently bend to thereby allow displacement relative to the core 18 of the wing 39 s flange 26 that is attached to the pipe 39 s wall 14 in a cross section including axis c the aperture 11 in the pipe 39 s wall 14 has in the enlarged state a dimension d 2 that is larger than.