{"product_id":"poolpure-spa-filter-cartridge-prb25sf-replacement-for-unicel-c-4405-filbur-fc-2387-6-5-8-x-5-50-micron-trilobal","title":"POOLPURE Spa Filter Cartridge PRB25SF Replacement for Unicel C-4405 \/ Filbur FC-2387 — 6-5\/8\" x 5\", 50‑Micron Trilobal","description":"\u003cp\u003e\u003cstrong\u003ePOOLPURE PRB25SF is a heavy-duty replacement spa cartridge engineered to restore clear, debris-free water for spa and small pool systems that use Unicel C-4405 \/ Filbur FC-2387 style filters.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt with a trilobal filtration fabric, reinforced cores and a 50-micron media layer, this POOLPURE replacement cartridge balances high-efficiency particle capture with easy rinsing and long service life. It’s designed as a compatible swap for common OEM part numbers and tested in demanding aquatic environments; the result is consistent clarity and fewer cartridge changes over the season.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter improve water clarity?\u003c\/h3\u003e\n\n\u003cp\u003eThe PRB25SF combines a trilobal fiber structure with a fine 50-micron layer to trap very small particles that standard filters miss. That dual-action design increases surface area and holds more debris between cleanings, so water looks clearer longer without extra chemicals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTrilobal fabric delivers roughly three times the adsorption surface compared to ordinary fibers\u003c\/li\u003e\n  \u003cli\u003e50-micron filtration captures hair, dust, sand, and fine organic matter\u003c\/li\u003e\n  \u003cli\u003e50 sq. ft. filtration area reduces flow restrictions while maximizing capture\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this cartridge fit my existing spa or pool system?\u003c\/h3\u003e\n\n\u003cp\u003eThe PRB25SF is a direct compatible replacement for several common OEM part numbers, including Unicel C-4405 and Filbur FC-2387, and matches the same critical dimensions for drop-in swap. Confirm your unit’s length and end-cap opening measurements before ordering to ensure a correct fit.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eLength: 6 5\/8\" and outer diameter: 5\" for direct compatibility\u003c\/li\u003e\n  \u003cli\u003eTop and bottom openings: 2 1\/8\" to match standard housings\u003c\/li\u003e\n  \u003cli\u003eListed cross-reference: Unicel C-4405, Filbur FC-2387, R172464 and others\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does cleaning and maintenance compare to other cartridges?\u003c\/h3\u003e\n\n\u003cp\u003ePOOLPURE’s patented dirt-locking fabric releases trapped debris easily during a rinse, so maintenance is quicker and more effective. The reinforced construction resists wear and wrinkles, meaning you’ll rinse fewer times and replace cartridges less often than standard models.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePatented dirt-locking structure simplifies rinse-clean cycles\u003c\/li\u003e\n  \u003cli\u003e4 oz. thickened polyester fabric and reinforced ABS end caps improve durability\u003c\/li\u003e\n  \u003cli\u003eReusable with routine rinsing; longer lifespan reduces replacement frequency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the product safe and industry certified?\u003c\/h3\u003e\n\n\u003cp\u003eYes — components used in this POOLPURE cartridge are tested for long-term water exposure and meet NSF\/ANSI 50 material safety standards, assuring you won’t introduce harmful substances into your water. POOLPURE also partners with recognized industry groups and aquatic programs to validate performance in real-world conditions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIAPMO-tested to NSF\/ANSI 50 for material safety\u003c\/li\u003e\n  \u003cli\u003ePHTA membership and athlete-tested performance in training environments\u003c\/li\u003e\n  \u003cli\u003eUsed and recommended by trained pool professionals and competitive aquatic programs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The POOLPURE PRB25SF suits spa and small-pool owners who want a high-efficiency, long-lasting replacement cartridge compatible with common OEM numbers. It’s ideal for homeowners and facility managers seeking stronger fine-particle capture, reduced maintenance time, and a durable cartridge that holds up under frequent use.\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 POOLPURE PRB25SF fit Unicel C-4405 housings?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The POOLPURE PRB25SF matches the same length and 2 1\/8\" end openings for direct compatibility with Unicel C-4405 housings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace this cartridge?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacement depends on use, but durable construction typically extends service life beyond standard cartridges—inspect and rinse monthly and replace when flow or clarity noticeably declines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"POOLPURE","offers":[{"title":"Default Title","offer_id":56820928184660,"sku":"B08PZ8DFH2","price":85.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/poolpure-prb25sf-front-view.jpg?v=1786966708","url":"https:\/\/gardenluxe.co.uk\/products\/poolpure-spa-filter-cartridge-prb25sf-replacement-for-unicel-c-4405-filbur-fc-2387-6-5-8-x-5-50-micron-trilobal","provider":"Gardenluxe Uk","version":"1.0","type":"link"}