Pentair Purex Filter Grids Filbur SMBW 48 SQ.FT 2000 & 4000 Series
These require a bottom manifold.
Grids 24" tall
Pentair Purex Filter Grids Full Set SM,SMBW 48 SQ.FT.
You get the full set of 8 Filbur grids to replace models SM,SMBW 2048 pool filters.