Patent ID: 9072990
Filing Date: 2015-07-07
Classification: B01D,Y10T

Abstract:
1. An underdrain filter block for use in draining and backwashing a filtering media in a filter bed, the block comprising: a top wall; a pair of side walls extending from the top wall; an imperforate bottom wall extending between the pair of side walls; a plurality of ribs extending circumferentially along the pair of side walls; a plurality of wall segments positioned below said imperforate bottom wall and the sidewalls, wherein each said wall segment respectively extends from one of the plurality of ribs to an adjacent one of the plurality of ribs to define a plurality of grout chambers with the bottom wall and the ribs; and wherein the the plurality of wall segments each include a plurality of openings extending transversely relative to a longitudinal axis of the underdrain filter block into said grout chambers.