The ornamental design for a waterpump, as shown and described.
FIG. 1 is a perspective view of my water pump from the front;
FIG. 2 is a side view of the left side of my water pump;
FIG. 3 is a side view of the right side of my water pump;
FIG. 4 is an end view of the front of my water pump;
FIG. 5 is an end view of the rear of my water pump;
FIG. 6 is a top plan view of my water pump; and,
FIG. 7 is a bottom view of my water pump.
The drawings show in FIGS. 1, 2, 3, 6, 7 at the front end of my water pump a screen that appears solid black or almost solid black. FIGS. 2 and 3 show the mesh structure of the screen that, when viewed at certain angles, appears to be a solid surface. The FIGS. 2 and 3 show the elements arranged in the interior of the screen of my water pump; these elements are not part of the design of my water pump.
Centrifugal pump having a housing and a volute casing wherein the volute casing has a tear-drop shaped inner wall defined by a circular body region and a converging apex with the inner wall comprising a blocker below at least one perimeter end of one diffuser blade