{"product_id":"unicel-c-8420","title":"Unicel C-8420 Replacement Filter for Pentair TX-50 | 200 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel C-8420 is a pleated polyester cartridge filter element engineered for high-capacity residential and light commercial pool installations, delivering 200 sq ft of effective filtration area in a four-cartridge set configuration. Construction utilizes Reemay spunbond polyester media at a nominal 20-micron filtration rating, supported by a PVC pipe core for axial rigidity under sustained operating pressure. End caps are ABS injection-molded with closed-bottom and open-flow top geometry, dimensionally matched to Pentair\/Sta-Rite TX-Series canister seats for bypass-free installation. The element is rated for continuous service at 104°F and operating pressures up to 25 PSI, with combined set flow capacity matched to factory pump head curves for the TX-50 housing platform.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: chemical soak with TSP or commercial enzyme cleaner every 3–6 months to remove oils and organic loading; pressure-differential replacement triggered at ΔP ≥ 8–10 PSI above clean-filter operating baseline, or annually, whichever occurs first. Rinse cartridges at 4–6 week intervals or whenever ΔP rise indicates surface loading. The ABS end cap construction is compatible with muriatic acid soak at 1:20 dilution (20-minute maximum exposure) for calcium scale removal; rinse thoroughly before reinstallation. Chlorine tolerance: continuous service at ≤ 10 ppm free available chlorine; bromine compatible without restriction. Verify O-ring condition on canister lid and confirm post-installation operating pressure against clean baseline before returning system to automated service. 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":42315915231278,"sku":"UNFC8420","price":141.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/1_c954a932-d623-45f2-a3c6-e2bc535990ad.png?v=1778969257","url":"https:\/\/poolzilla.com\/products\/unicel-c-8420","provider":"Poolzilla","version":"1.0","type":"link"}