{"product_id":"pleatco-spa-filter-cartridge-prb25-in-replacement-for-unicel-c-4326-filbur-fc-2375-25-sq-ft-point-bonded-media","title":"Pleatco Spa Filter Cartridge PRB25-IN Replacement for Unicel C-4326 Filbur FC-2375 — 25 sq ft, Point-Bonded Media","description":"\u003cp\u003e\u003cstrong\u003ePleatco PRB25-IN is a high-performance replacement spa filter cartridge engineered to fit Unicel C-4326 and Filbur FC-2375 applications while improving water clarity and reducing maintenance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis genuine Pleatco cartridge combines advanced point-bonded media with a reinforced free-flow core to capture finer particles, sustain higher flow rates, and extend the time between cleanings. Manufactured and quality-tested in the U.S., the PRB25-IN matches OEM dimensions for a direct swap and offers features designed to lower operating pressures on pump systems and make cleaning easier.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this cartridge improve spa water clarity?\u003c\/h3\u003e\n\u003cp\u003eThe PRB25-IN uses Pleatco's point-bonded filtration fabric that traps smaller contaminants compared with standard media. That finer capture means clearer, cleaner water and less frequent filter cleanings without changing your equipment setup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced point-bonded media with high fiber density for finer filtration\u003c\/li\u003e\n  \u003cli\u003e25 square feet of media surface area to hold more debris\u003c\/li\u003e\n  \u003cli\u003eEven dirt-loading design prevents localized clogging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this filter fit my existing spa system?\u003c\/h3\u003e\n\u003cp\u003eThe PRB25-IN is a direct replacement for Unicel C-4326 and Filbur FC-2375 and is compatible with many Dynamic and Waterway in-line models. Its critical dimensions match OEM specs so installation is straightforward: same top and bottom hole diameters and length.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter: 5\" (127 mm); Length: 13.3125\" (338.14 mm)\u003c\/li\u003e\n  \u003cli\u003eTop and bottom hole size: 2.125\" for direct fit\u003c\/li\u003e\n  \u003cli\u003eCompatible cross-references listed by Pleatco for easy verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat design elements reduce pump strain and maintenance?\u003c\/h3\u003e\n\u003cp\u003ePleatco's Free Flow Core features a box-ladder injection-molded structure that reinforces the cartridge and promotes consistent water flow across the media. Greater flow and lower operating pressure reduce wear on pumps and help the media load dirt evenly, extending service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInjection-molded core supports higher flow with less pressure\u003c\/li\u003e\n  \u003cli\u003eReinforcing supports maintain pleat spacing and stability\u003c\/li\u003e\n  \u003cli\u003eSuperbond bands resist breakage and simplify cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to clean and maintain this filter?\u003c\/h3\u003e\n\u003cp\u003eThe point-bonded fabric releases trapped debris quickly during routine rinsing, which shortens cleaning time and lowers the effort required. Regular rinses and occasional deep-soak cleanings will restore flow and keep the cartridge functioning near peak performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMedia formulated to release dirt with simple rinsing\u003c\/li\u003e\n  \u003cli\u003eLonger cycles between required cleanings compared with conventional cartridges\u003c\/li\u003e\n  \u003cli\u003eSmartTrack code printed for lifetime identification and support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Owners and service technicians who need an OEM-fit, high-efficiency spa filter that reduces maintenance frequency and lowers operating strain on pumps. The Pleatco PRB25-IN is ideal for anyone replacing Unicel C-4326 or Filbur FC-2375 cartridges, or for users seeking a durable upgrade with documented quality controls and U.S.-based engineering support.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the PRB25-IN directly replace Unicel C-4326?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The PRB25-IN matches the Unicel C-4326 dimensions and connections for a direct swap without modifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I clean this Pleatco cartridge?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Clean when flow noticeably reduces; with Pleatco media you’ll typically rinse less often than standard cartridges.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Pleatco","offers":[{"title":"Default Title","offer_id":56831167988052,"sku":"B0017PRFMI","price":58.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/pleatco-prb25-front-view.jpg?v=1787012277","url":"https:\/\/gardenluxe.co.uk\/products\/pleatco-spa-filter-cartridge-prb25-in-replacement-for-unicel-c-4326-filbur-fc-2375-25-sq-ft-point-bonded-media","provider":"Gardenluxe Uk","version":"1.0","type":"link"}