I claim the ornamental design for a pumphead, as shown and described.
FIG. 1 is a front right perspective view of a pumphead showing my new design;
FIG. 2 is a front left perspective view of the pumphead of FIG. 1;
FIG. 3 is a front view of the pumphead of FIG. 1;
FIG. 4 is a rear view of the pumphead of FIG. 1;
FIG. 5 is a right side view of the pumphead of FIG. 1;
FIG. 6 is a left side view of the pumphead of FIG. 1;
FIG. 7 is a top view of the pumphead of FIG. 1; and,
FIG. 8 is a bottom view of the pumphead of FIG. 1.
Broken lines in the drawing views show portions of the pumphead that form no part of the claimed design. The small internal lines, shown in FIGS. 5-8, appearing between predominantly elongated lines are to be interpreted as broken lines, but cannot be shown as broken lines by virtue of the size of the respective lines.