The ornamental design for a drainhose, as shown and described.
FIG. 1 is a perspective view of a drain hose showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a side elevation view thereof, the opposing side being a mirror image;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is bottom plan view thereof.
The drain hose is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claim. The evenly spaced broken lines shown in FIGS. 1 and 6 depict portions of the drain hose that form no part of the claim. The dash dot broken lines shown in FIGS. 1-4 indicate cutoff boundaries of the hose at the symbolic break that form no part of the claim.