Hi Mark, No this would not be the correct grid assembly for the Pac Fab NS36. You would require this DE Grid Assembly for the Pac-Fab NS36 We do carry the Tank O-ring for the Pac-Fab NS36 (o-ring which goes between top and bottom half of housing). This does not include the o-ring for where it attaches to the filter. We do carry All of The Parts to your Pac Fab Nuatilus Stainless DE Filter.
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