{"product_id":"tier1-jacuzzi-j300-j400-replacement-spa-filter-4-pack-15-5-6-75in-trilobal-high-flow","title":"Tier1 Jacuzzi J300 J400 Replacement Spa Filter 4-Pack — 15.5×6.75in Trilobal High-Flow","description":"\u003cstrong\u003eTier1 Replacement for Jacuzzi J300 \u0026amp; J400 Spa Filter (4pk) is a direct-fit, NSF-tested cartridge designed to restore clear water and steady circulation in compatible Jacuzzi and universal spa systems.\u003c\/strong\u003e\n\n\u003cp\u003eWhen your spa’s filter is clogged or worn, water clarity, heater efficiency, and pump performance fall off quickly. These Tier1 cartridges are built to match common Jacuzzi and aftermarket filter references so you can swap them in without modifying the housing. Each cartridge combines a high-flow internal core with trilobal filter media to trap finer debris while maintaining consistent circulation.\u003c\/p\u003e\n\n\u003ch3\u003eWill these Tier1 cartridges physically fit my J300 or J400 spa?\u003c\/h3\u003e\n\u003cp\u003eThe Tier1 cartridges measure 15-1\/2\" long by 6-3\/4\" wide and are engineered to match the dimensions of popular replacement references used in J300 and J400 systems. They are made to align with original filter housing and seals to prevent leaks or poor seating.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExact dimensions: 15-1\/2\" x 6-3\/4\" for reliable seat and sealing.\u003c\/li\u003e\n  \u003cli\u003eCross-compatible with Pleatco PJW60TL-OT-F2S and PJW60TL models.\u003c\/li\u003e\n  \u003cli\u003eAlso fits Filbur FC-2715, Unicel 6CH-961 and SD-00641 references.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the filter media improve water clarity compared to standard cartridges?\u003c\/h3\u003e\n\u003cp\u003eThese cartridges use trilobal fibers that present a greater surface area versus conventional round fibers, which captures more fine particles and organic matter. The result is clearer water and fewer contaminants making their way back into the spa between cleanings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrilobal dirt-lock media traps up to 40% more debris than round fibers.\u003c\/li\u003e\n  \u003cli\u003eCaptures hair, skin oils, leaves, and fine particulates effectively.\u003c\/li\u003e\n  \u003cli\u003eMaintains flow to reduce strain on pumps and heaters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these cartridges durable and safe for regular spa use?\u003c\/h3\u003e\n\u003cp\u003eTier1 filters are independently tested for performance and longevity under NSF protocols, which evaluates filtration effectiveness and material durability. They’re designed to tolerate normal chemical exposure typical in spa maintenance when used and cleaned according to manufacturer guidance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIndependently tested to NSF 50 standards for durability and performance.\u003c\/li\u003e\n  \u003cli\u003eRobust construction reduces tearing and collapse during use.\u003c\/li\u003e\n  \u003cli\u003eWashable cartridge body extends service life between replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will these filters affect pump and heater performance?\u003c\/h3\u003e\n\u003cp\u003eThe cartridge includes an engineered high-flow core to preserve steady water circulation. That helps the pump operate without added strain and avoids common issues like reduced heater flow or pressure drops that can occur with restrictive filters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInternal high-flow core maintains consistent circulation and pressure.\u003c\/li\u003e\n  \u003cli\u003eReduces risk of pump overwork compared with clogged\/old media.\u003c\/li\u003e\n  \u003cli\u003eDesigned to allow adequate heater flow for efficient temperature control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This 4-pack is aimed at spa owners and service professionals who need a cost-effective, reliable replacement for Jacuzzi J300 and J400 filtration cartridges or equivalent aftermarket models. Choose this set if you want a direct-fit spare, improved fine-particle capture, NSF-tested performance, and a high-flow design to protect pumps and heaters during regular spa 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: Which Jacuzzi models are these filters compatible with?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit Jacuzzi J300 and J400 systems and match Pleatco, Filbur, and Unicel reference numbers listed for direct replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace these spa cartridges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace when visibly clogged or every 3–6 months depending on usage and water care; clean regularly to extend life.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tier1","offers":[{"title":"Default Title","offer_id":56801546371412,"sku":"B07BQFS1QW","price":244.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/tier1-front-packaging-jacuzzi-j300-j400-filter.jpg?v=1786743794","url":"https:\/\/gardenluxe.co.uk\/products\/tier1-jacuzzi-j300-j400-replacement-spa-filter-4-pack-15-5-6-75in-trilobal-high-flow","provider":"Gardenluxe Uk","version":"1.0","type":"link"}