The ornamental design for a waterpurifier, as shown and described.
FIG. 1 is a left front perspective view from above of the water purifier showing our new design;
FIG. 2 is a front elevational view of the water purifier of FIG. 1;
FIG. 3 is a rear elevational view of the water purifier of FIGS. 1 and 2;
FIG. 4 is a left side elevational view of the water purifier of FIGS. 1-3;
FIG. 5 is a right side elevational view of the water purifier of FIGS. 1-4;
FIG. 6 is a top plan view of the water purifier of FIGS. 1-5;
FIG. 7 is a bottom plan view of the water purifier of FIGS. 1-6;
FIG. 8 is a front elevational view of the water purifier in which the cover plate has been removed;
FIG. 9 is a left front perspective view from above, showing the water purifier component of FIG. 8 in isolation; and,
FIG. 10 is a left front perspective view from above, showing the water purifier component of FIG. 8 in isolation, in which the filter is being replaced.