Pentair Stainless Steel Back-Up Ring | FNS Plus, Quad D.E., Clean & Clear Plus & FullFloXF Filters | 195339 C8410 Don't forget the companion partial

Don't forget the companion partial grid — Unicel PG-1906 Partial DE Filter Grid

Swimmers can re-enter the water immediately after treatment

Interchangeable flow tabs for marking ports (english & spanish included)

This vinyl ring with inserts provides the sealing and structural interface between the fitting body and the pool surface

The Unicel C-4607 is a 4000 Series replacement filter cartridge delivering 5 sq

Pentair Stainless Steel Back-Up Ring | FNS Plus, Quad D.E., Clean & Clear Plus & FullFloXF Filters | 195339 C8410 Don't forget the companion partialThe Pentair Stainless Steel Back Up Ring (195339) is the OEM replacement seal component for Pentair FNS Plus, Quad D. E., Clean & Clear Plus, and FullFloXF series pool and spa filters. IMPORTANT: MANUFACTURING DATE REQUIREMENT This back up ring is designed for filters manufactured after February 2003 (FNS Plus and Quad D. E. models) and after March 2003 (Clean & Clear Plus models). Check your filter's manufacturing date label before ordering.