{"product_id":"unicelreplacementfiltercartridge30sf4ch30unf4ch30","title":"Unicel Replacement Filter Cartridge 30 sf | 4CH-30","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eUnicel 4CH-30 Replacement Spa Filter Cartridge – 30 Sq Ft (4-5\/8\" OD x 11-7\/8\" Length, 1-1\/2\" MPT Bottom)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Unicel 4CH-30 is a \u003cstrong\u003etop-load spa filter cartridge\u003c\/strong\u003e designed for select hot tubs and spa filter canisters that use a\n    \u003cstrong\u003e1-1\/2\" male pipe thread (MPT)\u003c\/strong\u003e screw-in bottom connection and a \u003cstrong\u003emolded cone handle\u003c\/strong\u003e on top for easy removal.\n    With \u003cstrong\u003e30 sq ft\u003c\/strong\u003e of pleated filtration area, it helps capture fine debris for clearer water and more consistent circulation when\n    rinsed and cleaned regularly.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e30 sq ft\u003c\/strong\u003e pleated filtration area for effective debris capture\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop:\u003c\/strong\u003e molded cone handle (closed top) for quick removal\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBottom:\u003c\/strong\u003e \u003cstrong\u003e1-1\/2\" MPT\u003c\/strong\u003e threaded connection for a secure, screw-in fit\u003c\/li\u003e\n    \u003cli\u003eDurable pleated media and rigid core built for repeated cleaning cycles\u003c\/li\u003e\n    \u003cli\u003eIdeal replacement when pleats are torn, flattened, or the cartridge stays restrictive after cleaning\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 4CH-30\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFiltration Area:\u003c\/strong\u003e 30 sq ft\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 4-5\/8\" (4.625\")\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 11-7\/8\" (11.875\")\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop End Cap:\u003c\/strong\u003e Molded cone handle (closed)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBottom End Cap:\u003c\/strong\u003e 1-1\/2\" male thread (MPT)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePleat Count:\u003c\/strong\u003e 158\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReplaces \/ Cross References\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFilbur:\u003c\/strong\u003e FC-0141 \/ FC-0141M\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePleatco:\u003c\/strong\u003e PTL25P4\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSundance Spas:\u003c\/strong\u003e 6540-484\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDimension One:\u003c\/strong\u003e 1561-14\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSaratoga Spas:\u003c\/strong\u003e 74407-98\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDarlly:\u003c\/strong\u003e 40301\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBaleen:\u003c\/strong\u003e AK-9005\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eThis cartridge uses a \u003cstrong\u003ethreaded bottom\u003c\/strong\u003e (1-1\/2\" MPT). If your current filter has a slip (non-threaded) fitting or a different thread size, you need a different cartridge.\u003c\/li\u003e\n    \u003cli\u003eAlways confirm fit by matching the \u003cstrong\u003eOD\u003c\/strong\u003e, \u003cstrong\u003elength\u003c\/strong\u003e, and \u003cstrong\u003ebottom connection style\u003c\/strong\u003e to your existing filter.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFlow is weak or the system struggles to maintain circulation even after cleaning\u003c\/li\u003e\n    \u003cli\u003ePleats are torn, frayed, flattened, or separating from the end caps\u003c\/li\u003e\n    \u003cli\u003eThe cartridge quickly plugs up again after rinsing\u003c\/li\u003e\n    \u003cli\u003eEnd caps or threaded connection are cracked\/warped and won’t seal properly\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    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=silicone%20pool%20lube\"\u003eSilicone O-Ring Lubricant (Pool\/Spa)\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 spa use) to prevent restriction and keep flow strong.\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\u003eLet the cartridge dry after deep cleaning when possible—drying can help loosen fine debris for easier rinsing.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Unicel","offers":[{"title":"Default Title","offer_id":46797840187567,"sku":"4CH-30","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/unicel-replacement-filter-cartridge-30-sf-4ch-30-cartridges-7575871.jpg?v=1777068021","url":"https:\/\/freshized.com\/products\/unicelreplacementfiltercartridge30sf4ch30unf4ch30","provider":"Freshized","version":"1.0","type":"link"}