Inclined tubes and plates can be used in sedimentation basins to allow greater loading rates. This technology relies on the theory of reduced-depth sedimentation: particles need only settle to the surface of the tube or plate below for removal from the process flow. Generally, a space of two inches is provided between tube walls or plates to maximize settling efficiency. The typical angle of inclination is about 60 degrees, so that settled solids slide down to the bottom of the basin.