{"product_id":"unicel-7ch-322","title":"Unicel 7CH-322 Replacement Filter for Coleman 2\" MPT top load | 32 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel 7CH-322 is a pleated polyester spa cartridge filter element from Unicel's specialty commercial 7CH series, engineered for Coleman 2-inch MPT top-load filter housings and providing 32.0 sq ft of effective filtration area. The element is constructed with Reemay nonwoven polyester media in a high-pleat-count configuration, mated to molded ABS end caps with an integrated 2-inch MPT (male pipe thread) fitting at the top end cap for direct top-load housing engagement, and a closed bottom end cap. Internal core construction supports the axial pressure loading typical of threaded top-load spa filter applications. Nominal filtration efficiency falls within the 15–25 micron range under standard test conditions; the element is rated for continuous service at spa operating temperatures up to 104°F with intermittent excursions to 115°F acceptable per manufacturer protocol.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation for spa applications: rinse with fresh water every 2–4 weeks; chemical soak in dilute TSP or enzyme cleaner every 4–6 weeks to remove body oils, lotions, and surfactant residues that resist mechanical rinsing. Replacement is recommended at 3-month intervals for spas with daily or continuous bather use, or at 6-month intervals for seasonal\/occasional use; ΔP replacement trigger is ≥ 5 PSI above clean-filter baseline. 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 is compatible for calcium scale removal (20-minute maximum exposure, rinse thoroughly before reinstallation). Enzyme cleaners are compatible without restriction. 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 spa 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":42315918639150,"sku":"UNF7CH322","price":43.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNF7CH322_085f853f-31de-47bb-a45c-1ce75def43af.jpg?v=1777663817","url":"https:\/\/poolzilla.com\/products\/unicel-7ch-322","provider":"Poolzilla","version":"1.0","type":"link"}