{"product_id":"unicel-c-7489","title":"Unicel C-7489 Replacement Filter for Hayward CX875RE | 112 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel C-7489 is a pleated polyester cartridge filter element engineered for medium-to-large residential and light commercial cartridge filter systems, delivering 112 sq ft of effective filtration area through a high-pleat-count Reemay nonwoven polyester media pack. Dimensional specifications: 7.0-inch OD, 3.0-inch ID, 23.3125-inch length, with a 4.0-inch top opening and a closed, molded bottom end cap. Construction features ABS injection-molded end caps bonded with UV-stabilized urethane adhesive over a perforated polypropylene core providing axial rigidity under sustained operating pressure. Nominal filtration efficiency is 20 microns under standard test conditions; rated continuous operating temperature is 104°F at pressures up to 35 PSI. The element is sized for single-cartridge housings requiring full-flow filtration with extended service intervals between cleanings.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: residential installations — rinse every 4–6 weeks or at ΔP ≥ 8 PSI above clean-filter operating baseline, with chemical soak (TSP or enzyme cleaner) every 3–6 months and full element replacement annually or at first evidence of fabric degradation, pleat channeling, or core compression. For commercial duty, document ΔP on each service visit and replace on a 60–90 day cycle subject to bather load. Chemical compatibility: polyester media tolerates continuous service at ≤ 10 ppm free available chlorine and standard bromine sanitization; muriatic acid soak at 1:20 dilution is acceptable for calcium scale (20-minute maximum exposure, followed by thorough fresh-water rinse) provided urethane end cap bonding is inspected post-treatment. Enzyme cleaners compatible without restriction. Standard Unicel 90-day manufacturing defect warranty applies through authorized distribution.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eYour order includes the selected quantity of replacement pool filter cartridges. Each unit is individually inspected for quality before shipping.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":42315913199662,"sku":"UNFC7489","price":82.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNFC7489_cc469f5c-671b-4d48-a497-6e704a2ecca0.jpg?v=1777663340","url":"https:\/\/poolzilla.com\/products\/unicel-c-7489","provider":"Poolzilla","version":"1.0","type":"link"}