• Manufacturer: Pacfab 

• Type: Replacement O-ring 

• Specifications: 1/2" diameter x 1/4" width 

The 109-7470 Pacfab o-ring is a replacement pool o-ring for the following Pentair filters: Pentair Nautilus and Nautilus Plus D.E. filter models NS24, NS36, NS48, NS60, NS72, NSP-24, NSP-36, NSP-48, NSP-60, and NSP-72; Pentair FNS D.E. filter models FNS 24, FNS 36, FNS 48, and FNS 60; and Pentair Triton sand filter models C, C-3, TR100C and TR140C