{"product_id":"pentair-178582-lid-assembly-cnc-520sqft-fns-plus","title":"Pentair 178582 FNS Plus 520 Sq Ft Filter Lid Assembly","description":"\u003cp\u003e\u003cstrong\u003eWhat This Part Is Used For\u003c\/strong\u003e\u003cbr\u003ePentair 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy This Part Matters\u003c\/strong\u003e\u003cbr\u003eLarge 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.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features and Specifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePentair manufacturer part number 178582\u003c\/li\u003e\n\u003cli\u003eFor FNS Plus 520Sqft filter\u003c\/li\u003e\n\u003cli\u003eCNC lid assembly configuration\u003c\/li\u003e\n\u003cli\u003eSeals cartridge filter tank\u003c\/li\u003e\n\u003cli\u003eOEM Pentair replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eInstallation and Fitment Guidance\u003c\/strong\u003e\u003cbr\u003eTurn off pump and relieve pressure before removal. Inspect sealing surfaces and O-ring condition during installation. Confirm by manufacturer part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout the Pentair Brand\u003c\/strong\u003e\u003cbr\u003ePentair manufactures high capacity filtration systems for residential pools. Their FNS Plus series is widely used in the field. Using OEM Pentair lids helps maintain correct pressure and performance. Service professionals rely on Pentair for dependable filter components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon Service Context\u003c\/strong\u003e\u003cbr\u003eThis lid is typically replaced when stress cracks develop from long term use.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":52078615101714,"sku":"178582","price":365.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/2279\/1186\/files\/PEN178582_0.jpg?v=1772563107","url":"https:\/\/www.aquaterrabackyard.com\/products\/pentair-178582-lid-assembly-cnc-520sqft-fns-plus","provider":"Aqua Terra Backyard","version":"1.0","type":"link"}