{"product_id":"unicelreplacementfiltercartridge25sffreeflowspasclx4ch23unf4ch23","title":"Unicel Replacement Filter Cartridge 25 sf Freeflow Spas CLX | 4CH-23","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eUnicel 4CH-23 Replacement Spa Filter Cartridge (Top-Load Style)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Unicel 4CH-23 is a replacement \u003cstrong\u003epleated spa filter cartridge\u003c\/strong\u003e designed for select hot tub and spa filtration\n    systems that use this specific cartridge style and fitment. Replacing a worn or damaged cartridge helps restore circulation,\n    improves water clarity, and reduces strain on spa pumps and heaters.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eReplacement \u003cstrong\u003espa cartridge filter\u003c\/strong\u003e for compatible filter canisters\u003c\/li\u003e\n    \u003cli\u003ePleated media captures fine debris for clearer water\u003c\/li\u003e\n    \u003cli\u003eDurable end caps and rigid core built for repeated cleaning cycles\u003c\/li\u003e\n    \u003cli\u003eHelps maintain steady flow when rinsed and cleaned on a routine schedule\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility Notes (Important)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMany spa cartridges look similar—match by \u003cstrong\u003epart number (4CH-23)\u003c\/strong\u003e whenever possible.\u003c\/li\u003e\n    \u003cli\u003eBefore ordering, compare your existing filter’s:\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOutside diameter\u003c\/strong\u003e and \u003cstrong\u003eoverall length\u003c\/strong\u003e\n\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTop end style\u003c\/strong\u003e (open, closed, handle, or cone\/knob)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eBottom end style\u003c\/strong\u003e (open, slip, or threaded—if threaded, confirm thread size\/type)\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/li\u003e\n    \u003cli\u003eIf your current cartridge uses a \u003cstrong\u003ethreaded screw-in\u003c\/strong\u003e base, confirm the thread type matches exactly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePleats are torn, frayed, flattened, or separating from the end caps\u003c\/li\u003e\n    \u003cli\u003eFlow is weak or the spa struggles to circulate even after cleaning\u003c\/li\u003e\n    \u003cli\u003eWater stays cloudy despite balanced chemistry and normal sanitizer levels\u003c\/li\u003e\n    \u003cli\u003eEnd caps are cracked\/warped or the inner core is weakening\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e(1) Unicel replacement spa filter cartridge\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20cartridge%20filter%20cleaner\"\u003eSpa Cartridge Filter Cleaner\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=cartridge%20cleaning%20wand\"\u003eCartridge Cleaning Wand\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20water%20test%20strips\"\u003eSpa Water Test Strips\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20pre-filter%20hose\"\u003eSpa Fill \/ Hose Pre-Filters\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20scale%20remover\"\u003eSpa Scale Remover\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRinse the cartridge regularly (often weekly with heavy use) to prevent restriction and keep jets performing well.\u003c\/li\u003e\n    \u003cli\u003eDeep clean every 3–6 weeks with a cartridge cleaner to remove oils; rinse thoroughly before reinstalling.\u003c\/li\u003e\n    \u003cli\u003eIf scale is present, degrease first, then treat for scale (never reverse the order), and rinse completely.\u003c\/li\u003e\n    \u003cli\u003eRotating between two cartridges (one in use, one drying after cleaning) can extend overall filter life and improve filtration consistency.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Unicel","offers":[{"title":"Default Title","offer_id":46797840154799,"sku":"4CH-23","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/unicel-replacement-filter-cartridge-25-sf-freeflow-spas-clx-4ch-23-cartridges-7083555.jpg?v=1777068020","url":"https:\/\/freshized.com\/products\/unicelreplacementfiltercartridge25sffreeflowspasclx4ch23unf4ch23","provider":"Freshized","version":"1.0","type":"link"}