The novel and ornamental design concept for water gauge, substantially as shown and described in the aforedescribed five numbered Figures of the accompanying drawing.
FIG. 1 is a front elevational view of a water gauge showing my new design;
FIG. 2 is a rear elevational view;
FIG. 3 is a top plan view;
FIG. 4 is a bottom plan view; and,
FIG. 5 is a cross-sectional view taken along line 5--5 of FIG. 1 thereof.
FIG. 5 has been drawn on an enlarged scale with respect to FIGS. 1-4.