Patent ID: 8443828

Claim:
A device for providing a flow of water over a wall comprising, a pair of spaced, generally planar end walls, each having a notch sized and configured to receive an upper portion of the wall; one or more interior walls, each having a notch sized and configured to receive an upper portion of the wall, the one or more interior walls located between the end walls; and, a cover attached to an upper portion of the outer edges of the end walls and the one or more interior walls, wherein, the end walls, the one or more interior walls, and the cover form a plurality of open-bottomed chambers with at least an upper part of the notches of the end walls and the one or more interior walls located above the bottom of the chambers; and, each of the chambers has at least one opening in communication with an upper part of the chamber located above the top of the notches of the end walls and the one or more interior walls, the at least one opening of each chamber being selectively connectable in communication with a source of suction and a vent.