FIG. 1 is a top and left side perspective view of a valve and tube assembly showing our new design;

FIG. 2 is a top and right side perspective view thereof;

FIG. 3 is an enlarged left side elevational view thereof;

FIG. 4 is an enlarged back side elevational view thereof;

FIG. 5 is an enlarged right side elevational view thereof;

FIG. 6 is an enlarged top plan view thereof; and,

FIG. 7 is an enlarged bottom plan view thereof.

The broken lines in the figures show boundaries of the invention and form no part of the claimed design.