The ornamental design for a waterfilterhousing, as shown and described.
FIG. 1 is a perspective view of the left front of the water filter housing of the present invention as seen from above;
FIG. 2 is a back view of the water filter housing;
FIG. 3 is a front view of the water filter housing;
FIG. 4 is a left side view of the water filter housing;
FIG. 5 is a right side view of the water filter housing;
FIG. 6 is a top view of the water filter housing; and,
FIG. 7 is a bottom view of the water filter housing.
The dashed lines in FIGS. 1-3, 5 and 7 indicate features which are not part of the claimed invention. Further, the design inside the dashed line inside the outer perimeter of FIG. 7 is also not a part of the claimed invention.