Abstract: Disclosed herein is a filter sector for a vacuum disc slurry filter which is molded from an elastomer such as rubber and which is provided with a grid of reinforcing bands and a grid of ribs superimposed on the supporting bands to provide a supporting surface for the filter bag. The bands and ribs form slots and channels with a minimum surface area contacting the filter bag to provide increased vacuum communication with the filter bag and thus enhance cake build-up for more efficient separation of the liquids and solids. The use of rubber results in a lighter disc sector and minimizes abrasion on the filter bag and increases bag life.