Flush tank
FIG. 1 is a perspective view taken from the top, front and right side of a flush tank showing my new design; 
     FIG. 2 is a top plan view thereof; 
     FIG. 3 is a left side elevational view thereof, the right side being a mirror image of the left side; 
     FIG. 4 is a front elevational view thereof; and, 
     FIG. 5 is a rear elevational view thereof.