The ornamental design for a waterheaterstand, substantially as shown and described.
FIG. 1 is a top perspective view of a water heater stand according to the present invention;
FIG. 2 is a front side elevation view of the water heater stand of FIG. 1;
FIG. 3 is a rear side elevation view of the water heater stand of FIG. 1;
FIG. 4 is a left side elevation view of the water heater stand of FIG. 1;
FIG. 5 is a right side elevation view of the water heater stand of FIG. 1;
FIG. 6 is a top plan view of the water heater stand of FIG. 1; and,
FIG. 7 is a bottom plan view of the water heater stand of FIG. 1.
The broken lines are for illustrative purposes and represent environmental structure and unclaimed portions of the invention and therefore form no part of the claimed design.