The ornamental design for a waterfilter, as shown and described.
FIG. 1 is a front right perspective view of a water filter of the present embodiment;
FIG. 2 is a front perspective view of the present embodiment in situ;
FIG. 3 is a rear perspective view of the present embodiment;
FIG. 4 is a rear perspective view of the present embodiment in situ;
FIG. 5 is a front perspective, exploded view of the present embodiment;
FIG. 6 is a front perspective, exploded view of the present embodiment in situ;
FIG. 7 is a rear view of the present embodiment;
FIG. 8 is a left side view of the present embodiment;
FIG. 9 is a front view of the present embodiment;
FIG. 10 is a right view of the present embodiment;
FIG. 11 is a top view of the present embodiment; and,
FIG. 12 is a bottom view of the present embodiment.
The broken line showing portions of the water filter and the environment in FIGS. 2, 4 and 6 is included for the purpose of illustrating and forms no part of the claimed design.