{"product_id":"pentair-178553-lid-assembly-cnc-50-100sqft-fns-plus","title":"Pentair 178553 FNS Plus 50\/100 Sq Ft Filter Lid Assembly","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eMaintaining 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePentair manufacturer part number 178553\u003c\/li\u003e\n\u003cli\u003eFor FNS Plus 50Sqft and 100Sqft filters\u003c\/li\u003e\n\u003cli\u003eCNC lid assembly configuration\u003c\/li\u003e\n\u003cli\u003eFilter tank sealing component\u003c\/li\u003e\n\u003cli\u003eOEM Pentair part\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003eDepressurize the system fully before servicing the filter. Inspect and lubricate the O-ring if required. Confirm by manufacturer part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Pentair Brand\u003c\/strong\u003e\u003cbr\u003ePentair produces cartridge filters known for reliable pool filtration. Their OEM replacement parts are engineered for direct compatibility. Using genuine Pentair lids helps maintain system integrity. Technicians trust Pentair for consistent equipment performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis lid is often replaced during filter rebuilds when leaks appear around the tank top.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078615068946,"sku":"178553","price":149.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PEN178553_0.jpg?v=1772563105","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-178553-lid-assembly-cnc-50-100sqft-fns-plus","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}