{"product_id":"pentair-170021-lid-assembly-48sqft-fns-plus","title":"Pentair 170021 FNS Plus 48 Sq Ft Filter Lid Assembly","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair 170021 Lid Assembly - 48Sqft, FNS Plus is a replacement lid for compatible FNS Plus 48Sqft filters. It covers and seals the filter tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eMaintaining a proper seal prevents pressure loss and water leaks. A damaged lid can disrupt filtration efficiency. Replacing it helps restore consistent 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 170021\u003c\/li\u003e\n\u003cli\u003eFor FNS Plus 48Sqft filter\u003c\/li\u003e\n\u003cli\u003eFilter lid assembly\u003c\/li\u003e\n\u003cli\u003eSealing 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 before removal. Inspect and lubricate O-ring as needed during installation. 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 trusted in residential pool systems. Their replacement parts are built for direct compatibility. Using OEM Pentair lids helps maintain system integrity. Professionals rely on Pentair for reliable filtration equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis lid is often replaced during filter rebuilds when leaks develop around the tank top.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078614937874,"sku":"170021","price":325.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PEN170021_0.jpg?v=1772563097","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-170021-lid-assembly-48sqft-fns-plus","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}