Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Mabel or cold-climate installations

or cold-climate installations

you’ll experience precise fitment

This four-tile configuration clearly communicates a No Diving rule directly on pool surfaces

Cover or store away during harsh weather and winter

It is also encountered in valve areas within pump wet ends and return lines where Waterway components meet

Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Mabel or cold-climate installationsWhat 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