Abstract: A filter apparatus having an identification and filter subassembly. The identification and filter subassembly includes a bag filter and a top end collar and a radial identification tag. The collar has a lower portion fixedly connected to the bag filter, and has a middle portion to be supported within a vessel, and has a top lip portion to engage a cover plate of the vessel. The collar has a pivotable web portion disposed between the middle portion and the top lip portion, and has an inner surface with a groove having sidewalls. The identification tag is cantilevered radially outwardly from the top lip portion for reading information disposed thereon from the exterior of the vessel.