The ornamental design for a breastpumpmanifold, as shown and described.
FIG. 1 is a rear perspective view of a breast pump manifold showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dash-dash broken lines in the drawings depict portions of the breast pump manifold that form no part of the claimed design. The dash-dot broken lines define the boundary of the claimed design and form no part thereof.