{"product_id":"unicel-uhd-sr70","title":"Unicel UHD-SR70 Replacement Filter for Sta-Rite WC108-57S2X | 72 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel UHD-SR70 is a high-capacity pleated polyester cartridge filter element engineered for the Pentair\/Sta-Rite Posi-Clear and System:3 modular cartridge filter platforms, providing 72.0 sq ft of effective filtration area through a heavy-duty Reemay nonwoven polyester media pack. Construction features molded end caps with reinforced banding for high-pressure commercial-grade service, a perforated polypropylene core for axial rigidity under sustained ΔP loading, and a nominal filtration efficiency in the 20-micron range under standard test conditions. The element is rated for continuous service up to 104°F at operating pressures to 50 PSI, supporting the System:3 modular two- and three-element manifold configurations where total media area scales linearly with element count for matched pump flow on residential and light commercial circulation systems.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: replacement triggered at ΔP ≥ 8–10 PSI above clean-filter operating baseline, or on a 12-month calendar cycle under normal residential duty; commercial and high-bather-load installations should follow a 30–90 day inspection cycle with ΔP logging per local health code requirements. Mid-cycle maintenance: fresh-water rinse every 4–6 weeks; chemical degreasing soak (TSP solution or enzyme cleaner) every 3–6 months to address oil and surfactant loading that resists hydraulic rinsing. Calcium scale removal via muriatic acid soak at 1:20 dilution is compatible with the molded end cap and polyester media; limit exposure to 20 minutes maximum and rinse thoroughly before reinstallation. Chlorine tolerance: continuous service at ≤ 10 ppm FAC; bromine compatible to 30 ppm total. Verify all manifold O-rings and the housing band clamp gasket for compression set at each element change, and confirm post-installation pressure within 2 PSI of historical clean baseline before returning the system to service. Standard Unicel 90-day manufacturer 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":42315916312622,"sku":"UNFUHDSR70","price":72.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNFUHDSR70_2c33b2c5-3c8e-4619-94f6-96b651d00342.jpg?v=1777663647","url":"https:\/\/poolzilla.com\/products\/unicel-uhd-sr70","provider":"Poolzilla","version":"1.0","type":"link"}