{"product_id":"filbur-rectangular-diatomaceous-earth-de-grid-pool-filter-18-inch-by-15-3-16-inch-center-port-fc-9840","title":"Filbur Rectangular Diatomaceous Earth DE Grid Pool Filter 18 Inch By 15 3 16 Inch Center Port FC 9840","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Filbur Rectangular Diatomaceous Earth (DE) Grid, FC-9840—the OEM-grade replacement grid engineered for spa and pool filtration. Measuring 18\" x 15-3\/16\" with a center port, this rectangular DE grid delivers precise DE distribution for consistently clear water and easier maintenance in high-demand filtration systems.\u003c\/p\u003e \u003cp\u003eWhy this grid stands out\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRobust center-frame design\u003c\/strong\u003e—extruded PVC center cores provide even stress distribution and prevent warping under heavy debris loads, helping your filter maintain steady performance over more seasons.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAntimicrobial-ready construction\u003c\/strong\u003e—critical contact points are treated to resist odor-causing bacteria and mold, extending grid life in challenging spa and pool environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated fittings for simple installation\u003c\/strong\u003e—end connections are molded into the grid, reducing setup steps and eliminating the need for separate adapters that can impede flow.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWider, break-resistant frame members\u003c\/strong\u003e—designed to keep the grid sections aligned and evenly spaced, minimizing flutter and ensuring consistent filtration even in turbulent flow.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear part identification\u003c\/strong\u003e—embossed part numbers on the grid help with fast replacement and reordering, so you stay in filtration flow with minimal downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEngineered for salt and chlorine resilience\u003c\/strong\u003e—the grid—and its critical components—are formulated to withstand common pool sanitizers, keeping you on a reliable maintenance schedule.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat it means for your water and your wallet\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise DE distribution\u003c\/strong\u003e translates to deeper dirt removal and more stable water clarity, so you spend less time backwashing and more time swimming.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLonger service life\u003c\/strong\u003e—reinforced construction and antimicrobial features help resist wear, reducing replacement frequency compared with non-OEM grids.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConsistent flow\u003c\/strong\u003e—the grid’s design maintains open channels and reduces clogging, which supports efficient backwash cycles and energy savings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use scenarios\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacement for aging DE grids in standard spa and pool filtration setups that accept 18\" x 15-3\/16\" rectangles with a center port.\u003c\/li\u003e \u003cli\u003eUpgrading to OEM-grade components for improved reliability in high-use environments, saltwater pools, or chlorine-intensive systems.\u003c\/li\u003e \u003cli\u003eMaintenance refresh after seasonal shutdowns to restore filtration efficiency without redesigning your housing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips for installation and care\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eBefore installing FC-9840, inspect the grid for any transport damage and ensure the center port aligns with your housing’s flow path.\u003c\/li\u003e \u003cli\u003eRinse the grid with clean water to remove any packaging dust or fine debris, then insert it in the correct orientation to maintain optimal DE coating distribution.\u003c\/li\u003e \u003cli\u003ePeriodically inspect for signs of wear, warping, or cracking; replace the grid if you notice reduced flow or visible damage.\u003c\/li\u003e \u003cli\u003eWhen performing routine maintenance, use manufacturer-recommended cleaning methods to preserve the antimicrobial features and frame integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn short, the Filbur FC-9840 Rectangular DE Grid combines durable construction, built-in installation features, and chlorine\/salt resilience to deliver dependable filtration performance day after day. If you’re seeking an OEM-grade replacement that simplifies upkeep while optimizing water clarity, this grid is a precise fit for your 18\" x 15-3\/16\" DE filtration system with a center port.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Filbur Manufacturing","offers":[{"title":"Default Title","offer_id":40241552818218,"sku":"FC-9840","price":41.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/4014\/1354\/products\/14-176-1145_xl.jpg?v=1769976123","url":"https:\/\/bathparts.com\/en-um\/products\/filbur-rectangular-diatomaceous-earth-de-grid-pool-filter-18-inch-by-15-3-16-inch-center-port-fc-9840","provider":"Bath \u0026 Spa Superstore","version":"1.0","type":"link"}