Sewage tank for use with a pump, the tank having a tapered lower portion and a plurality of intersecting ribs defining recessed pockets

摘要

Disclosed is a sewage tank (20) for use with a pump to convey sewage. The tank is a container (21) comprising a sidewall having an upper portion (24) and a lower tapering portion (22) defining a chamber, the lower tapering portion having a reduced size compared to said upper portion. The upper portion comprises of a plurality of intersecting ribs (25, 27) defining a plurality of recessed pockets (29), and the lower tapering portion comprises of a plurality of intersecting ribs defining a plurality of recessed pockets. Some of the recessed pockets of the lower tapering portion are defined by an outer surface of said sidewall of the lower tapering portion, and are entirely surrounded by the ribs so that the outer portions of the ribs define a plurality of openings to the recessed pockets.