{"product_id":"unicel-c-5397","title":"Unicel C-5397 Replacement Filter for Waterway 500-0080 | 80 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel C-5397 is a pleated polyester cartridge filter element engineered for high-capacity spa and swim-spa applications, providing 80.0 sq ft of filtration area through a high-density Reemay nonwoven polyester media pack. Dimensional specifications: 8-15\/16 inch OD, 4-1\/16 inch ID at the top opening with a closed bottom end cap, and 9-1\/4 inch overall length. Construction features ABS injection-molded end caps with a molded-in top handle for service retrieval, bonded to a perforated polypropylene core for axial rigidity under elevated spa-circulation pressures. Nominal filtration efficiency is 15 microns under standard test conditions. The element is rated for continuous service to 115°F, with intermittent temperature excursions to 120°F acceptable per spa-rated bond specifications. UV-stabilized end cap adhesive resists degradation under sustained bromine and chlorine exposure typical of high-bather-load spa environments.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation for swim-spa and high-volume spa applications: rinse with fresh water every 2–4 weeks; chemical soak (dilute TSP or commercial enzyme cleaner) every 4–6 weeks to remove accumulated body oils, surfactants, and cosmetic residues that resist water rinsing alone. Replacement trigger: ΔP ≥ 5 PSI above clean-filter operating baseline, or 12-month calendar cycle, whichever occurs first; accelerated replacement at 6–9 months recommended for continuously circulated swim-spa installations. Chemical compatibility: polyester fabric and ABS end caps tolerate continuous operation at ≤ 10 ppm free available chlorine or ≤ 30 ppm total bromine; muriatic acid soak at 1:20 dilution compatible for calcium scale removal (20-minute maximum exposure, thorough rinse required). 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":42315912314926,"sku":"UNFC5397","price":49.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNFC5397_883c0d57-864b-4750-96e7-2ddc6fad7702.jpg?v=1777663233","url":"https:\/\/poolzilla.com\/products\/unicel-c-5397","provider":"Poolzilla","version":"1.0","type":"link"}