{"product_id":"pentair-pacfab-fns-plus-48-sq-ft-grid-assembly-48-sqft-replacement-de-filter-element-restores-flow-and-lowers-pressure","title":"Pentair PacFab FNS Plus 48 sq ft Grid Assembly — 48 sqft replacement DE filter element, restores flow and lowers pressure","description":"\u003cp\u003e\u003cstrong\u003ePentair's PacFab FNS Plus 48 sq ft grid assembly is a direct replacement DE filter element built to restore filtration performance in compatible Pentair pool and spa D.E. systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your Pentair FNS Plus or PacFab D.E. filter is showing higher pressure, reduced flow, or uneven cleaning, replacing the complete grid assembly is a common maintenance step. This factory-style 48 square foot grid set is sized and configured for Pentair PacFab housings that require a 48 sq ft media area, and it includes the full element set needed to refinish your filter’s internal filtration surfaces.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does this grid assembly replace inside my FNS Plus filter?\u003c\/h3\u003e\n\u003cp\u003eThe Pentair 59023400 kit replaces the full internal element grid package used in PacFab FNS Plus D.E. filters that specify 48 square feet of filtration. It swaps out degraded or torn grids and regenerates the surface area that traps dirt and debris.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes complete set of pleated grid elements sized to 48 sq ft total surface.\u003c\/li\u003e\n  \u003cli\u003eFits PacFab FNS Plus filter housings designed for 48 sq ft media.\u003c\/li\u003e\n  \u003cli\u003eRestores original pleat spacing and filtration area for consistent flow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will installing this replacement affect my pool’s performance?\u003c\/h3\u003e\n\u003cp\u003eInstalling a new grid assembly typically reduces operating pressure and restores circulation efficiency by providing clean pleated surfaces for diatomaceous earth to cling to. The result is more consistent filtration and easier cleaning cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLowers differential pressure caused by clogged or damaged grids.\u003c\/li\u003e\n  \u003cli\u003eImproves water clarity by re-establishing full media surface area.\u003c\/li\u003e\n  \u003cli\u003eMakes backwashing and cleaning more effective and predictable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this grid assembly compatible with my Pentair PacFab FNS Plus model?\u003c\/h3\u003e\n\u003cp\u003eThis element set corresponds to Pentair PacFab FNS Plus filters that call for a 48 square foot grid assembly. Confirm compatibility by checking the filter model number and the element part reference (Pentair 59023400) against your unit’s manual or service label.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for PacFab FNS Plus housings requiring 48 sq ft media.\u003c\/li\u003e\n  \u003cli\u003ePart number: Pentair 59023400 — use this to verify fit.\u003c\/li\u003e\n  \u003cli\u003eConsult your filter manual or a service tech if unsure about model fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eReplacing the grid assembly is a moderate DIY task for someone comfortable handling pool equipment, or a quick job for a service technician. Careful handling and correct reassembly ensure reliable long-term filtration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTurn off pump and relieve tank pressure before opening the filter.\u003c\/li\u003e\n  \u003cli\u003eRemove old grids, clean tank interior, and install new grid set per Pentair instructions.\u003c\/li\u003e\n  \u003cli\u003eRecoat with the proper grade of diatomaceous earth and monitor pressure after startup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This 48 sq ft Pentair PacFab FNS Plus grid assembly is intended for pool owners, maintenance professionals, and service shops maintaining Pentair D.E. filters that require a complete element replacement. Choose this kit when your filter shows signs of wear, tears, persistent pressure increases, or when scheduled maintenance calls for full grid renewal to maintain optimal circulation and clarity.\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: Does this grid kit fit all PacFab FNS Plus filters?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits PacFab FNS Plus models that specify 48 square feet; verify with part number 59023400 or your filter’s model plate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace the grid assembly?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacement frequency depends on use and condition, but inspect annually and replace when grids are torn or pressure stays high after cleaning.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":56805911626068,"sku":"B001E06892","price":651.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/pentair-pacfab-grid-assembly-front.jpg?v=1786810821","url":"https:\/\/gardenluxe.co.uk\/products\/pentair-pacfab-fns-plus-48-sq-ft-grid-assembly-48-sqft-replacement-de-filter-element-restores-flow-and-lowers-pressure","provider":"Gardenluxe Uk","version":"1.0","type":"link"}