Plenum Cap T

FIG. 1 is a top perspective view of a plenum cap T. FIG. 2 is a side plan view of the plenum cap T. FIG. 3 is a second, side plan view of the plenum cap T. FIG. 4 is a front plan view of the plenum cap T. FIG. 5 is a back plan view of the plenum cap T. FIG. 6 is a top plan view of the plenum cap T; and, FIG. 7 is a bottom plan view of the plenum cap T. The plenum cap T is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.