{"product_id":"unicel-4ch-25-23-sq-ft-8-w-1-1-2-mpt","title":"Unicel | 4CH-25 | Cartridge Filter – 23 Sq. Ft., 8\" Length, 1-1\/2\" MPT Threaded Fitting","description":"\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-68e16e0e-f51c-8325-9079-33cd2b405fad-8\" data-testid=\"conversation-turn-254\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"24d316f2-50cb-45f3-94c2-f6861467e131\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-instant\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words dark markdown-new-styling\"\u003e\n\u003cp data-start=\"108\" data-end=\"465\"\u003eThe Unicel 4CH-25 Cartridge Filter is a 23-square-foot replacement spa and hot tub filter engineered for high-performance water clarity and durability. Built with premium pleated polyester media and a 1-1\/2\" MPT threaded fitting, this filter delivers reliable debris capture and smooth water flow for consistent, long-lasting filtration.\u003c\/p\u003e\n\u003chr data-start=\"467\" data-end=\"470\"\u003e\n\u003cp data-start=\"472\" data-end=\"490\"\u003e\u003cstrong data-start=\"472\" data-end=\"488\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"491\" data-end=\"1163\"\u003e\n\u003cli data-start=\"491\" data-end=\"553\"\u003e\n\u003cp data-start=\"493\" data-end=\"553\"\u003eGenuine Unicel replacement cartridge filter (Model 4CH-25)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"554\" data-end=\"633\"\u003e\n\u003cp data-start=\"556\" data-end=\"633\"\u003e23 sq. ft. of pleated polyester media for efficient dirt and debris removal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"634\" data-end=\"674\"\u003e\n\u003cp data-start=\"636\" data-end=\"674\"\u003eMeasures 4-5\/8\" diameter x 8\" length\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"675\" data-end=\"744\"\u003e\n\u003cp data-start=\"677\" data-end=\"744\"\u003e1-1\/2\" MPT (male threaded) bottom fitting for secure installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"745\" data-end=\"811\"\u003e\n\u003cp data-start=\"747\" data-end=\"811\"\u003eDurable polyester media resists chemicals and pressure fatigue\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"812\" data-end=\"888\"\u003e\n\u003cp data-start=\"814\" data-end=\"888\"\u003eReinforced core provides structural stability under high flow conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"889\" data-end=\"963\"\u003e\n\u003cp data-start=\"891\" data-end=\"963\"\u003eCompatible with Waterway and other spa and hot tub filtration systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"964\" data-end=\"1030\"\u003e\n\u003cp data-start=\"966\" data-end=\"1030\"\u003eEasy to install, clean, and maintain for extended service life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1031\" data-end=\"1091\"\u003e\n\u003cp data-start=\"1033\" data-end=\"1091\"\u003ePromotes superior water clarity and balanced circulation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1092\" data-end=\"1163\"\u003e\n\u003cp data-start=\"1094\" data-end=\"1163\"\u003eIdeal for spa owners seeking dependable, high-efficiency filtration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1165\" data-end=\"1168\"\u003e\n\u003cp data-start=\"1170\" data-end=\"1496\"\u003e\u003cstrong data-start=\"1170\" data-end=\"1190\"\u003eProduct Overview\u003c\/strong\u003e\u003cbr data-start=\"1190\" data-end=\"1193\"\u003eThe Unicel 4CH-25 Cartridge Filter provides excellent water filtration for spas and hot tubs, capturing fine debris and contaminants to maintain crystal-clear water. Its precision-engineered design ensures optimal flow and minimal maintenance, helping extend the life of your spa’s circulation system.\u003c\/p\u003e\n\u003cp data-start=\"1498\" data-end=\"1887\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eConstructed with high-quality polyester media, a reinforced internal core, and a 1-1\/2\" MPT threaded connection, the 4CH-25 offers a secure fit and reliable operation. Designed for long-term use in chemically treated spa environments, this Unicel filter combines performance, durability, and ease of maintenance—making it a trusted choice for efficient and consistent spa water filtration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e","brand":"Unicel","offers":[{"title":"Default Title","offer_id":47037577068856,"sku":"4CH-25","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/6319\/9544\/files\/Filter-Cartridge-for-Waterway-Clearwater-II-Pro-Clean-100-Above-Ground-Pools-817-0100N_1.avif?v=1777767976","url":"https:\/\/appaetechpoolsupply.com\/products\/unicel-4ch-25-23-sq-ft-8-w-1-1-2-mpt","provider":"AppaeTech Pool Supply","version":"1.0","type":"link"}