Pentair FNS Plus Filter Lid Assembly, 36 sq ft | 170020 Balboa Water Group Their check valves and internal

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Pentair FNS Plus Filter Lid Assembly, 36 sq ft | 170020 Balboa Water Group Their check valves and internalWhat This Part Is Used For Pentair 170020 Lid Assembly 36Sqft, FNS Plus is a replacement lid for compatible FNS Plus 36Sqft filter systems. It seals the filter housing. Why This Part Matters A secure lid is essential for maintaining system pressure. Cracks or warped lids can cause leaks and air intrusion. Replacing the lid restores proper filtration performance. Key Features and Specifications Pentair manufacturer part number 170020 For FNS Plus