The ornamental design for a faucethub, as shown and described.
FIG. 1 is a perspective view of a faucet hub showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating a portion of the faucet handle that forms no part of the claimed design.