The Filbur FC-9220 12 inch replacement DE Filter Grids are for use with Pentair / Purex SMBW 4024 24 Sq Ft and the SMBW 2024 24 Sq Ft Diatomaceous Earth or DE filters. These grids replace Purex part number 074922 and 8 are required for a full set.
The FC-9220 Grid measures 12 inches tall by 10-3/4 inches wide and are made with a reinforced center core, a polystyrene frame and covered with rot and mildew resistant polypropylene cloth. Heavy-duty, chemical resistant string is used to stitch the seams and the seams are sonic welded to prevent fraying. A complete grid set requires 8 grids but grids may be replaced one at a time.