{"product_id":"unicel-c-4401-35-sq-ft-spa-filter-cartridge","title":"Unicel C-4401 | 35 sq ft Spa Filter Cartridge","description":"\u003cp\u003e\u003cspan\u003e \u003c\/span\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eUnicel C-4401\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivers\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e35 square feet\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eof filtration across\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e158 pleats\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eof heavyweight\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4 oz Reemay® 2040 polyester media\u003c\/strong\u003e. Built to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emeet or exceed OEM specifications\u003c\/strong\u003e, it's the compact replacement cartridge for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePentair\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRainbow Dynamic Series IV\u003c\/strong\u003e, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eWaterway\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eskim filter systems.\u003c\/p\u003e\n\u003cp\u003eFiltration is the quiet backbone of clean spa water. Every soak leaves behind\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebody oils, lotions, hair, and fine debris\u003c\/strong\u003e, and the cartridge is what removes all of it before it clouds the water, feeds bacteria, or coats your plumbing. When a filter is worn or clogged, the effects spread everywhere: dull water, higher chemical use, softer jets, and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epump and heater straining\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eagainst restricted flow.\u003c\/p\u003e\n\u003cp\u003eWhat sets this cartridge apart is the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eheavier media\u003c\/strong\u003e. Where most spa cartridges use a 3 oz fabric, the C-4401 is built with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4 oz Reemay\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— a denser, more substantial material that stands up better to repeated cleanings and resists the matting that shortens a filter's life. Its\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003etrilobal\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efibers, three-lobed rather than round, deliver roughly\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e45% more surface area\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethan standard rounded filter fibers, so it captures more while releasing dirt readily when rinsed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eChemical-resistant end caps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith open 2-1\/8 inch ends make installation straightforward. Made in the USA.\u003c\/p\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cstrong\u003ePro Tip:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMeasure the length — three Unicel cartridges share this exact body diameter. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC-4401\u003c\/strong\u003e,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC-4335\u003c\/strong\u003e, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eC-4950\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eall have a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4-15\/16 inch diameter\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand the same\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eopen 2-1\/8 inch end caps\u003c\/strong\u003e, so they look nearly identical. Length is what separates them:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4-5\/8 inches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor this C-4401,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e9-1\/4 inches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor the C-4335, and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e13-5\/16 inches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor the C-4950. Note that the C-4401 and C-4335 are\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eboth\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003erated 35 sq ft, so square footage alone won't tell you which you need.\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cp\u003e\u003cspan role=\"img\" aria-label=\"®\"\u003eUNICEL®\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":46961547641028,"sku":"psk1791364599101","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/9690\/2596\/files\/unicel-c-4401-35-sq-ft-spa-filter-cartridge_1.png?v=1791364603","url":"https:\/\/mydoventa.com\/products\/unicel-c-4401-35-sq-ft-spa-filter-cartridge","provider":"Mydoventa","version":"1.0","type":"link"}