Water closet tank

In a preferred embodiment, the nature of this product is as a plumbing fixture in the form of a water closet tank.

FIG. 1 is a left, top, front perspective view of a water closet tank, according to my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side elevational view thereof being a mirror image of the left side shown; and,

FIG. 4 is a top plan view thereof.

The broken line representations of openings and/or controls in FIGS. 1 and 4 are for the purpose of illustration only, and form no part of the claimed design. The rear elevational and bottom plan views are not shown since they are not seen in normal use.