FIG. 1 is an upper perspective view of a water filter showing our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is an end view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is an upper perspective view of a top portion of our new design; and,

FIG. 7 is a top view of the top portion.

The portions shown in broken lines on the drawings represent environment only, and form no part of the claimed design.