The ornamental design for a filterassembly, as shown and described.
FIG. 1 is a perspective view of a first embodiment of filter assembly, showing a new dual module design with in accordance with the present invention;
FIG. 2 is front elevational view thereof;
FIG. 3 is side elevational view thereof;
FIG. 4 is an opposite side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a perspective view of a second embodiment of filter assembly, showing a new triple module design with in accordance with the present invention;
FIG. 8 is front elevational view thereof;
FIG. 9 is side elevational view thereof;
FIG. 10 is an opposite side elevational view thereof;