Drain Valve

FIG. 1 is a top perspective view of a drain valve according to my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a first side elevation view thereof;

FIG. 4 is a second side elevation view thereof;

FIG. 5 is a third side elevation view thereof;

FIG. 6 is a fourth side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the drain valve that form no part of the claimed design.