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and operate correctly
It is used as a top cover in pool filtration systems to seal and protect internal media
Nicheless Design: No bulky niche required—ideal for easy installation in pools
It directs water between filtration and backwash ports
Efficient Performance: Delivers 82 CFM of airflow
Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Napoleon and operate correctlyWhat This Part Is Used For Pentair 178582 Lid Assembly CNC, 520Sqft, FNS Plus is a replacement lid for compatible FNS Plus 520Sqft cartridge filters. It seals the large capacity filter housing. Why This Part Matters Large filters operate under steady pressure and require a secure lid. Cracked lids can cause leaks and pressure instability. Replacing the lid ensures consistent filtration and safe operation. Key Features and Specifications Pentair