{"product_id":"unicel-7ch-50","title":"Unicel 7CH-50 Replacement Filter for Vita Spas AB5-500 (1-1 | 50 Sq. Ft.","description":"\u003cdiv class=\"pz-pdp\"\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Unicel 7CH-50 is a high-capacity pleated polyester spa cartridge element providing 50.0 sq ft of effective filtration area in a threaded-base configuration designed for top-load spa housings utilizing a 1-1\/2 inch MPT integral connection. Media construction is Reemay nonwoven polyester (nominal 20-micron filtration efficiency) bonded to a molded ABS top end cap and a molded ABS base end cap incorporating the 1-1\/2 inch male pipe thread interface; no separate adapter or standpipe is required. The element is built on a perforated polypropylene core for axial rigidity under spa circulation pump loads in the 8–20 PSI operating range, with a maximum continuous service temperature of 115°F. The 7CH-prefix designation identifies this element as part of Unicel's specialty commercial and integrated-thread spa series, engineered to deliver extended surface area within the compact envelope characteristic of threaded-base spa housings.\u003c\/p\u003e\n\u003cp\u003eService interval recommendation: rinse with fresh water every 2–4 weeks of continuous spa operation; chemical soak in dilute TSP solution or commercial enzyme-based cartridge cleaner every 4–6 weeks to remove body oils, surfactants, and cosmetic residues that water rinsing alone will not extract. Replace the element at intervals not exceeding 12 months under normal residential spa duty, or sooner when ΔP rises ≥ 5 PSI above documented clean-filter operating baseline. Chemical compatibility: polyester media 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, followed by thorough fresh-water rinse). Hand-tighten the threaded base to housing seat plus 1\/4 to 1\/2 turn; do not apply pipe wrench torque, which will fracture the ABS base. 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":42315918573614,"sku":"UNF7CH50","price":47.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0016\/3453\/3422\/files\/UNF7CH50_f4ed50e6-4515-4fce-96fc-fcf432d00581.jpg?v=1777663811","url":"https:\/\/poolzilla.com\/products\/unicel-7ch-50","provider":"Poolzilla","version":"1.0","type":"link"}