Pleatco PHG2448 Cartridge/Grid Replacement for American, Pac-Fab, Hayward, Jandy, Astral with Waterway/Universal Grid Pleatco Cartridge Filter replacement Cartridge/Grid American, Pac-Fab, Hayward ,Jandy, Astral, Waterway/"Universal" grid Unicel: PG-1904; FILBUR: FC-9440