Water heater

FIG. 1 is a perspective view of a water heater showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is bottom plan view thereof;

FIG. 9 is an enlarged view of portion of FIG. 1 ;

FIG. 10 is an enlarged view of portion of FIG. 2 ; and,

FIG. 11 is an enlarged view of portion of FIG. 2 .

The broken lines in the drawings depict portions of the water heater that form no part of the claimed design.