Pentair FNS Plus Filter Lid Assembly, 50/100 sq ft | 178553 Oval Supports secure component attachment

Supports secure component attachment

A working check valve helps protect heaters

this assembly is perfect for traditional

supporting overall system performance

OEM parts maintain safety and appearance standards

Pentair FNS Plus Filter Lid Assembly, 50/100 sq ft | 178553 Oval Supports secure component attachmentWhat This Part Is Used For Pentair 178553 Lid Assembly CNC, 50 100Sqft, FNS Plus is a replacement lid for compatible FNS Plus 50Sqft and 100Sqft filter models. It seals the cartridge filter housing during operation. Why This Part Matters Maintaining a proper seal prevents air intrusion and water leaks. A damaged lid can reduce filtration efficiency and system pressure. Replacing the assembly restores normal filter performance. Key Features and