I've got an older PacFab NSS-48 DE filter, stainless steel outside. I need to replace the filter grids and the threaded rods that hold everything together are disintegrating from corrosion, I don't think the manifold is cracked anywhere but it's old and I saw this complete grid assembly on amazon and thought - why not buy a whole new full assembly. Here's the amazon link to the grid assembly, there are others with my same question but no one knows the answer. Grid assembly looks like this, which looks identical to mine except the tube at the top:
Again, I don't know if it will fit the old stainless steel shell. Mine is 48 sq. feet:
Same size as the Pentair FNS filter that the grid assembly is for:

Again, I don't know if it will fit the old stainless steel shell. Mine is 48 sq. feet:

Same size as the Pentair FNS filter that the grid assembly is for:
