FIG. 1 is a front/top/left perspective view of a first embodiment of a backflow testing device, showing our new design;
FIG. 2 is a rear/bottom/right perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a rear elevation view thereof;
FIG. 9 is a front/top/left perspective view a second embodiment of a backflow testing device, stippled for the color black;
FIG. 10 is a rear/bottom/right perspective view thereof, stippled for the color black;
FIG. 11 is a front/top/left perspective view a thrid embodiment of a backflow testing device, wherein the stippled areas represent a contrasted color, the contrasted color being non-black but otherwise not representing a specific color or color combination;
FIG. 12 is a rear/bottom/right perspective view thereof, wherein the stippled areas represent a contrasted color, the contrasted color being non-black but otherwise not representing a specific color or color combination;
FIG. 13 is a front/top/left perspective view a fourth embodiment of a backflow testing device, wherein the stippled areas represent a blue-green color; and,
FIG. 14 is a rear/bottom/right perspective view thereof, wherein the stippled areas represent a blue-green color.
The broken line disclosure of the hook is disposed within a circular cavity in FIGS. 2, 10, 12 and 14.
The broken lines shown throughout the drawing views are for illustrative purposes only and form no part of the claimed design.