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The ornamental design for a water heater, as shown and described. |
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FIG. 1 is a perspective view of a water heater showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a top elevational view thereof;
FIG. 4 is an end elevational view thereof;
FIG. 5 is a side elevational view of the opposite side to that in FIG. 2; and,
FIG. 6 is a bottom view thereof.
The opposite end view is identical to FIG. 4.
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