{"product_id":"unicel-c-7447","title":"Unicel C-7447 Replacement Filter for Hayward CX470XRE | 50 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel C-7447 is a pleated polyester cartridge filter element rated for residential and light commercial pool filtration applications, delivering 50.0 sq ft of effective filtration area through a Reemay nonwoven polyester media pack on a Schedule-40 PVC core. Construction features injection-molded ABS end caps with closed-bottom, open-flow-top geometry seated to OEM-equivalent tolerances for bypass-free housing fit. Nominal filtration efficiency is 20 microns under standard test conditions. The element is rated for continuous service to 104°F at operating pressures up to 25 PSI, with UV-stabilized end cap bonding for resistance to chemical degradation under standard pool water chemistry. Flow capacity scales with filter housing rating; the 50 sq ft area supports turnover rates appropriate to single- and multi-cartridge configurations in the Hayward Star-Clear and Sta-Rite Posi-Flo housing families.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: residential installations — pressure-differential replacement triggered at ΔP ≥ 8–10 PSI above clean-filter operating baseline, or on an annual calendar cycle, whichever occurs first. Rinse at 4–6 week intervals during the active swim season; chemical soak with TSP solution or commercial enzyme cleaner every 3–6 months to remove oils, surfactants, and organic loading that resist surface rinsing. For calcium scale accumulation, the ABS end cap construction is compatible with muriatic acid soak at 1:20 dilution (20 minutes maximum exposure); rinse thoroughly to neutral pH before reinstallation. Chlorine tolerance: continuous service at ≤ 10 ppm free available chlorine; bromine compatible without restriction. Confirm post-installation system pressure against documented clean baseline to establish ΔP reference for subsequent service cycles. Standard Unicel 90-day manufacturer's 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":42315912937518,"sku":"UNFC7447","price":56.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/1_be755728-9c98-48ff-ade0-46c6a4331430.png?v=1778968540","url":"https:\/\/poolzilla.com\/products\/unicel-c-7447","provider":"Poolzilla","version":"1.0","type":"link"}