{"product_id":"darlly-spa-pool-replacement-filter-cartridge-fc2660-filbur-40453-c4345-compatible-martec-sonfarrel-santana","title":"Darlly Spa Pool Replacement Filter Cartridge FC2660 Filbur 40453 C4345 Compatible Martec Sonfarrel Santana","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Darlly Spa\/Pool Replacement Filter Cartridge 40453 — the precise, reliable replacement for Spa and Pool systems that use Filbur FC-2660 (C-4345). If your setup relies on Martec\/Sonfarrel, Santana, or Sonfarrel\/Advantage Bottom housings, this cartridge is designed to drop in with the same footprint and filtration performance, so you can refresh your filter without changing the housing or setup.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect compatibility:\u003c\/strong\u003e Replaces Filbur FC-2660 (C-4345) and fits Martec\/Sonfarrel, Santana, and Sonfarrel\/Advantage Bottom filter canisters. A seamless swap that preserves your system’s filtration workflow.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExact physical specs:\u003c\/strong\u003e Top style Closed; Bottom style Open. Outer diameter 4-15\/16\" (125 mm); Length 14-7\/8\" (378 mm); Bottom physical dimension 2-1\/8\".\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFiltration area you can feel:\u003c\/strong\u003e 45 sq ft of media with 3 oz of filtration media. More surface area means more dirt captured per pass and longer intervals between cleanings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePerformance alignment:\u003c\/strong\u003e Engineered to maintain comparable flow and filtration efficiency to the original FC-2660, helping your spa or pool maintain clear water and balanced chemistry.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose this replacement cartridge\u003c\/h3\u003e\n\u003cp\u003eThis Darlly cartridge is molded to the exact geometry of your FC-2660-equivalent setup, which translates to fewer compatibility doubts and easier maintenance. By matching the top and bottom configurations, core size, and overall dimensions, it minimizes the risk of flow restrictions or poor seal performance—so you get dependable filtration without trial-and-error fitting.\u003c\/p\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential spas and hot tubs that rely on bottom-open, top-closed cartridges with a 4-15\/16\" OD and 14-7\/8\" length.\u003c\/li\u003e \u003cli\u003eAbove-ground pool filtration systems that previously used FC-2660\/C-4345 equivalents, seeking a cost-effective, reliable replacement.\u003c\/li\u003e \u003cli\u003eService professionals looking for a compatible, easy-to-store replacement option that simplifies maintenance across multiple client setups.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cp\u003eFor optimal performance and longevity, consider these best practices when using the Darlly 40453 cartridge:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eRinse the cartridge under clean water before first use to remove any loose fibers or manufacturing residue that could affect initial filtration.\u003c\/li\u003e \u003cli\u003eCheck the O-ring and housing seals during replacement to ensure a proper seal and consistent flow.\u003c\/li\u003e \u003cli\u003eMonitor water clarity and pressure; if you notice a drop in flow or cloudy water, inspect the cartridge for buildup and replace as needed to maintain filtration efficiency.\u003c\/li\u003e \u003cli\u003eKeep a spare cartridge on hand for quick swap-outs, especially during peak swim seasons or heavy-use periods.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Darlly Spa\/Pool Replacement Filter Cartridge 40453, you gain a dependable, true-fit alternative that aligns directly with the Filbur FC-2660 specifications while offering the same bottom\/open and top\/closed orientation your system expects. It’s a practical, economical choice for maintaining crystal-clear water in both spa and pool environments.\u003c\/p\u003e \u003cbr\u003e \u003ctable class=\"margintop4\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl0_labelAttributeName\"\u003eApplication\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl0_labelAttributeValue\"\u003eMartec\/Sonfarrel, Santana, Sonfarrel\/Advantage\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl1_labelAttributeName\"\u003eBottom Physical Dimension\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl1_labelAttributeValue\"\u003e2-1\/8\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl2_labelAttributeName\"\u003eBottom Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl2_labelAttributeValue\"\u003eOpen\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl3_labelAttributeName\"\u003eDiameter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl3_labelAttributeValue\"\u003e4-15\/16\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl4_labelAttributeName\"\u003eLength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl4_labelAttributeValue\"\u003e14-7\/8\"\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl5_labelAttributeName\"\u003eMedia Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl5_labelAttributeValue\"\u003e3oz\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl6_labelAttributeName\"\u003eSquare Footage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl6_labelAttributeValue\"\u003e45 sq ft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl7_labelAttributeName\"\u003eTop Style\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_ctl0__ctl0_listviewSpecificationAttributes_ctrl7_labelAttributeValue\"\u003eClosed\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Darlly","offers":[{"title":"Default Title","offer_id":40241545150506,"sku":"40453","price":62.61,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/4014\/1354\/files\/40453.jpg?v=1769976127","url":"https:\/\/bathparts.com\/products\/darlly-spa-pool-replacement-filter-cartridge-fc2660-filbur-40453-c4345-compatible-martec-sonfarrel-santana","provider":"Bath \u0026 Spa Superstore","version":"1.0","type":"link"}