{"product_id":"pentair-fns-plus-60-sq-ft-filter-grid-assembly-replacement-60-sq-ft-d-e-grid-pack-us-made-direct-drop-in","title":"Pentair FNS Plus 60 Sq Ft Filter Grid Assembly Replacement — 60‑sq‑ft D.E. Grid Pack, US‑made, Direct Drop‑In","description":"\u003cp\u003e\u003cstrong\u003ePentair FNS Plus 60 Sq Ft Filter Grid Assembly Replacement 59023300 is the complete element grid pack designed to restore filtration performance in 60-square-foot Pentair FNS Plus D.E. pool and spa filters.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement grid assembly contains the full set of filter elements sized specifically for Pentair 60-sq-ft FNS Plus D.E. filters. It rebuilds the internal grid structure that traps debris and supports diatomaceous earth (D.E.) media, returning the filter to its original footprint and flow characteristics. The assembly dimensions are 18\" length × 34-1\/2\" height × 17-1\/2\" width and the parts are manufactured in the United States to match Pentair's fit specifications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this grid assembly fit my Pentair FNS Plus 60-sq-ft filter?\u003c\/h3\u003e\n\n\u003cp\u003eThe assembly is engineered to the same dimensions and connection pattern used by Pentair for the FNS Plus 60 model, so it installs as a direct replacement without modifying the tank or laterals. Each element aligns with the manifold and tie-downs in the FNS Plus housing for a correct seal and spacing. Installation typically requires removing the old grids and dropping the new assembly into the filter body, then reattaching the top and reinspecting seals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDirect drop-in replacement for Pentair FNS Plus 60-sq-ft filters\u003c\/li\u003e\n  \u003cli\u003eDimensions: 18\" L × 34-1\/2\" H × 17-1\/2\" W to match the filter shell\u003c\/li\u003e\n  \u003cli\u003eManifold-compatible layout for correct alignment and sealing\u003c\/li\u003e\n  \u003cli\u003eReplaces worn or damaged elements to restore filtration area\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and construction should I expect from this replacement pack?\u003c\/h3\u003e\n\n\u003cp\u003eThe grid assembly comprises multiple fabric-covered filter panels supported by a rigid manifold assembly designed for D.E. filtration. Materials are selected to withstand the pressures and chemistry typical of pool and spa systems, with durable cloth filter media and molded manifolds. Because the product is built for Pentair systems, tolerances match the original specifications for reliable performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFabric-covered filter panels suited for D.E. media\u003c\/li\u003e\n  \u003cli\u003eRigid manifolding for uniform flow distribution\u003c\/li\u003e\n  \u003cli\u003eMolded components sized to Pentair specifications\u003c\/li\u003e\n  \u003cli\u003eManufactured in the United States to quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and maintain the replacement grid assembly?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation involves depressurizing and opening the filter, removing the old grid set, and seating the new assembly onto the manifold and tank floor. After reassembly, backwash and register pressure to establish baseline readings. Maintenance follows standard D.E. filter care: regular backwashing and periodic recharging with the correct amount of D.E. powder, plus inspection of grids for tears or deformation during seasonal checks.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eShut off pump and relieve tank pressure before opening\u003c\/li\u003e\n  \u003cli\u003eRemove old elements and inspect the tank interior for debris\u003c\/li\u003e\n  \u003cli\u003eSeat new grid assembly, secure manifold connections, reassemble\u003c\/li\u003e\n  \u003cli\u003eBackwash and recharge with specified D.E. powder; inspect annually\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill replacing the grid assembly change my filter’s performance?\u003c\/h3\u003e\n\n\u003cp\u003eReplacing worn or damaged grids restores the designed filtration surface area and flow paths, helping the filter operate as intended by the manufacturer. You should see more consistent pressure behavior and improved debris capture when the media and grids are in good condition. Performance gains depend on overall system condition, including pump size, plumbing, and D.E. maintenance routines.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRestores original filtration surface area when grids are compromised\u003c\/li\u003e\n  \u003cli\u003eCan reduce erratic pressure rises caused by torn or clogged panels\u003c\/li\u003e\n  \u003cli\u003ePerformance contingent on correct D.E. recharge and system plumbing\u003c\/li\u003e\n  \u003cli\u003ePart number 59023300 matches Pentair replacement specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: pool and spa owners or service technicians who maintain Pentair FNS Plus 60-square-foot D.E. filters and need an OEM-compatible full grid replacement. It’s suited for seasonal rebuilds, restoring lost filtration area after panel damage, or when you prefer a complete element set rather than individual panel repairs. Choose this assembly if you want components made to Pentair-fit dimensions and manufactured in the United States.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this a direct replacement for Pentair FNS Plus 60 filters?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the 59023300 grid assembly is a direct-fit replacement built to match the Pentair FNS Plus 60-sq-ft filter dimensions and manifold layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the assembly dimensions?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The replacement measures 18 inches long, 34-1\/2 inches high, and 17-1\/2 inches wide.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":56805874532692,"sku":"B000VE3HBY","price":760.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/pentair-fns-plus-60-front-assembly.jpg?v=1786810717","url":"https:\/\/gardenluxe.co.uk\/products\/pentair-fns-plus-60-sq-ft-filter-grid-assembly-replacement-60-sq-ft-d-e-grid-pack-us-made-direct-drop-in","provider":"Gardenluxe Uk","version":"1.0","type":"link"}