Patent ID: 8316802

Claim:
In combination, an animal enclosure having a side wall, and a grommet that is removably attachable at an opening forming a passage through the side wall, wherein the opening in the side wall has a non-round shape; wherein the grommet is configured to receive a watering fitting, wherein the grommet comprises a body and a flange, the flange residing adjacent to the opening on one of two opposite faces of the side wall; wherein the grommet further comprises a non-round structure that is axially spaced from the flange by a distance at least equal to a thickness of the side wall; wherein the non-round structure is insertable through the opening when aligned to the non-round shape, whereby the grommet is captured in the opening by rotating the non-round structure out of alignment with non-round shape, and rendered removable by aligning the non-round structure to the non-round shape, wherein the non-round structure comprises at least one radial protrusion tab from a body of the grommet and the non-round opening is shaped as a round hole having a radial protrusion opening admitting the at least one radial protrusion tab of the body of the grommet, such that the non-round structure of the grommet is complementary with the non-round opening in the side wall.