{"product_id":"unicel-24-filter-grid-astral-pac-fab-american-hayward-pg-1904","title":"Unicel 24\" Partial DE Filter Grid for 48 sq. ft. Systems | PG-1904","description":"\u003cp\u003ePrecision-engineered as an exact-fit replacement, the Unicel PG-1904 is the partial DE filter grid designed for use in 48 sq. ft. DE filter systems across Hayward, Pentair, Jandy, Astral, Waterway, and other leading filter brands. Built to exacting dimensional tolerances with reinforced construction, it delivers reliable filtration performance and a snug manifold fit — restoring your filter's full capacity and pressure resistance.\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: PARTIAL GRID — NOT A FULL GRID\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eThis is a single partial DE filter grid, used alongside full grids to complete a filter set. Verify your filter model's grid configuration before ordering — partial grids are NOT interchangeable with full grids.\u003c\/strong\u003e\n\u003c\/p\u003e\n\n\u003cp style=\"background-color: #fff3cd; border: 2px solid #FFEAA7; padding: 15px; border-radius: 5px; margin: 15px 0;\"\u003e\n\u003cstrong\u003e⚠️ IMPORTANT: Full Grids Also Required — This is the Partial Grid Only\u003c\/strong\u003e\u003cbr\u003e\nMost compatible 48 sq. ft. DE filter systems require \u003cstrong\u003e7 full grids + 1 partial grid (this item)\u003c\/strong\u003e for a complete re-grid service. You will also need the companion full grid — \u003ca href=\"https:\/\/www.poolaroo.com\/products\/unicel-24-de-filter-grid-pac-fab-american-hayward-sta-rite-fg-1004\"\u003e\u003cstrong\u003eUnicel FG-1004 Replacement DE Filter Grid\u003c\/strong\u003e\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003e\nPrefer to buy everything at once? The \u003ca href=\"https:\/\/www.poolaroo.com\/products\/unicel-24-de-filter-grid-set-pac-fab-american-hayward-fs-2004\"\u003e\u003cstrong\u003eUnicel FS-2004 Complete DE Filter Grid Set\u003c\/strong\u003e\u003c\/a\u003e includes all 7 full grids + this partial grid in one order.\n\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eFilter System Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e48 sq. ft. (total system capacity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eGrid Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e24\" (measured end-to-end; collar not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eGrid Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePartial Grid (used with 7 full grids for complete system)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eCollar Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eOpen slot with 2 notches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eHigh-grade DE filter fabric with reinforced seaming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote from Unicel:\u003c\/strong\u003e Collar has open slot (2 notches). Length is measured from one end of the grid to the other; collar is not included.\u003c\/p\u003e\n\n\u003ch3\u003eFits Into:\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\"\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eOEM Brand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eFilter Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eReplaces Part #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e\u003cstrong\u003eGrid Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eHayward\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eMicro-Clear 48, Pro-Grid 48\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eDEX4800DS\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair – American Products\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e5000 Series, Titan CM, Titan RPM, Titan Stainless Steel\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e59002300\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair – Pac Fab\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eFNS 48 (Nautilus FNS Polymeric), NS48 (Nautilus), NSP-48 (Nautilus Plus)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e19-2332\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003ePentair – Pac Fab\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eFNS Plus 48\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e59002300\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eJandy (Waterpik)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eDEL\/DEV 48\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eA0560100\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8f9fa;\"\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eAstral\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e18046 Clarity DE\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e—\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eWaterway Plastics\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003eCrystal Water\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e818-3900\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 10px;\"\u003e7 full (FG-1004) + 1 partial (PG-1904)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003e(This is not an exhaustive list.)\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always turn off the pump and release all pressure from the filter tank via the air relief valve before opening the tank to replace grids. Verify your filter model's grid count and configuration — most 48 sq. ft. systems use 7 full grids + 1 partial — and inspect the manifold o-ring and collar alignment before reassembly.\u003c\/p\u003e\n\u003cp class=\"sku-aliases\"\u003e\u003csmall\u003eAlso known as: PG1904\u003c\/small\u003e\u003c\/p\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":51588774232339,"sku":"PG-1904","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/0687\/5411\/files\/PG-1904__PG-1904_1.jpg?v=1771456386","url":"https:\/\/poolaroo.com\/products\/unicel-24-filter-grid-astral-pac-fab-american-hayward-pg-1904","provider":"Poolaroo","version":"1.0","type":"link"}