Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Napoleon Curved standard design for efficient

Curved standard design for efficient wall cleaning

When the assembly is worn

It is commonly used in premium gunite spa therapy seats

reducing surface ponding and minimizing the maintenance required when reopening the pool in spring

and operate correctly

Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Napoleon Curved standard design for efficientWhat 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