Water heater top cap assembly

FIG. 1 is a front perspective view of the new design for a water heater top cap assembly;

FIG. 2 is a back perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof;

FIG. 7 is a right side elevation view thereof;

FIG. 8 is a left side elevation view thereof; and

FIG. 9 is a front perspective view of the water heater top cap assembly installed on a water heater; and,

FIG. 10 is a back perspective view of the water heater top cap assembly installed on a water heater.

The broken lines shown represent portions of the water heater top cap assembly and environmental portions of the water heater that form no part of the claimed design.