{"product_id":"unicelreplacementfiltercartridge25sf7l6ch26unf6ch26","title":"Unicel Replacement Filter Cartridge 25 Sf, 7\" L | 6CH-26","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eUnicel 6CH-26 Replacement Spa Filter Cartridge – 25 Sq Ft (6\" OD, Handle Top, 1-1\/2\" Threaded Bottom)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Unicel 6CH-26 is a \u003cstrong\u003e25 sq ft\u003c\/strong\u003e pleated replacement filter cartridge used in select hot tub and spa filtration systems\n    that require a compact \u003cstrong\u003etop-load cartridge\u003c\/strong\u003e with a \u003cstrong\u003esemi-circular handle\u003c\/strong\u003e and a \u003cstrong\u003e1-1\/2\" threaded bottom connection\u003c\/strong\u003e.\n    Replacing a worn cartridge helps restore circulation, 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\u003e\n\u003cstrong\u003e25 sq ft\u003c\/strong\u003e filtration area for dependable debris capture\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop:\u003c\/strong\u003e semi-circular handle for easy removal\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBottom:\u003c\/strong\u003e \u003cstrong\u003e1-1\/2\" male threaded\u003c\/strong\u003e connection (commonly listed as MPT \/ SAE coarse thread depending on catalog)\u003c\/li\u003e\n    \u003cli\u003eDurable pleated media designed for repeated rinsing and deep-clean cycles\u003c\/li\u003e\n    \u003cli\u003eDirect replacement when matched by part number and dimensions\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 6CH-26\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFiltration Area:\u003c\/strong\u003e 25 sq ft\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e 6\"\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 7\" (some catalogs list approximately 7-1\/8\")\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop End Cap:\u003c\/strong\u003e Closed with handle\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBottom End Cap:\u003c\/strong\u003e 1-1\/2\" male threaded\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReplaces \/ Cross References (Verify Fit)\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFilbur:\u003c\/strong\u003e FC-0310\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePleatco:\u003c\/strong\u003e PAT25P4 (also commonly referenced: PTL25W-SV-P-4)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOther common references:\u003c\/strong\u003e 12521, AK-9012\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMany spa cartridges look similar—confirm the \u003cstrong\u003e6\" OD\u003c\/strong\u003e, \u003cstrong\u003e~7\" length\u003c\/strong\u003e, \u003cstrong\u003ehandle top\u003c\/strong\u003e, and \u003cstrong\u003e1-1\/2\" threaded bottom\u003c\/strong\u003e before ordering.\u003c\/li\u003e\n    \u003cli\u003eIf your current filter has a slip fitting (non-threaded) bottom, a different thread size, or a different top style, you likely need another model.\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\u003eFilter quickly plugs 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=Unicel%206CH-26\"\u003eUnicel 6CH-26 (Shop \/ Options)\u003c\/a\u003e\u003c\/li\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%20scale%20remover\"\u003eSpa Scale Remover\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  \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 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\u003eRotating between two cartridges (one in use, one drying after cleaning) can extend filter life and improve performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Unicel","offers":[{"title":"Default Title","offer_id":52589962527036,"sku":"6CH-26","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/unicel-replacement-filter-cartridge-25-sf-7-l-6ch-26-cartridges-8631069.jpg?v=1770393387","url":"https:\/\/aquapoolsupply.com\/products\/unicelreplacementfiltercartridge25sf7l6ch26unf6ch26","provider":"Aqua Pool Supply","version":"1.0","type":"link"}