The ornamental design for a handle for pump, as shown and described.
FIG. 1 is a front perspective view of a handle for pump showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a first side elevational view thereof,
FIG. 5 is an opposite side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in FIGS. 1-7 represent the boundary of the design, while the broken lines showing the remainder of the handle for pump illustrate the environment in which the design resides. The broken lines form no part of the claim.