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The plug also appears in jet bodies and pump housings where a temporary shutdown is required for service
Nicheless Design: No bulky niche required—ideal for easy installation in pools
It is often addressed during heater troubleshooting
and operate correctly
secure access
Pentair FNS Plus Filter Lid Assembly, 520 sq ft | 178582 Napoleon The plug also appears inWhat 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
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