Head Assembly for Refrigerator Filter

FIG. 1 is a top front perspective view of a head assembly for refrigerator filter showing my new design; FIG. 2 is a bottom rear perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is a left-side elevation view thereof; FIG. 6 is a right-side elevation view thereof; FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom plan view thereof. The broken lines shown in the drawing figures depict portions of the head assembly for refrigerator filter and form no part of the claimed design.