20 PC Bulk Replaces O-497 For Pentair FNS 39010200 Tank Clamp O-Ring Pool & Spa. This high-quality O-497 O-ring is compatible with Pentair Clean and Clear Plus, FNS Plus, and Quad DE filters. Designed for fiberglass-reinforced polypropylene tanks, it provides a tight seal to prevent leaks and maintain optimal filtration.
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