Pentair Purex Triton Bulkhead Spacer, Internal, 2 in, 154412

154412 Nut, 2 In. Internal Bulkhead Nut Used On Pac Fab (Pentair) Filters. This is the Inside Locknut for the Pentair Pool Filter Bulkhead. Fits Pac-Fab and Purex-Triton Sand Filters, and PacFab FNS DE Filters and Nautilus NS/NSP DE Filters. 15-4412 Can also be found on Many PacFab Purex Triton Filter Parts Pages