{"product_id":"grefilt-pool-filter-cartridges-c4030-4-pack-425-sq-ft-30-micron-trilobal-fabric-reinforced-end-caps","title":"Grefilt Pool Filter Cartridges C4030 4-Pack — 425 sq.ft, 30‑Micron Trilobal Fabric \u0026 Reinforced End Caps","description":"\u003cp\u003e\u003cstrong\u003eGrefilt's 4-pack C4030 pool filter cartridges deliver 425 sq.ft of 30-micron filtration per cartridge to keep pool water clear using durable trilobal fabric and reinforced end caps.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese replacement cartridges are designed for cartridge-style pool filters that accept Hayward SwimClear C4030\/C4025\/C4020-compatible elements, and they offer an upgraded fiber structure for higher particle capture and longer service intervals. Each cartridge measures 25 1\/2\" long with a 7\" outside diameter and 3\" top and bottom openings, so confirm your filter dimensions before ordering. Constructed from 5 oz heavy-duty trilobal filtration fabric around a supported core with ABS end caps, the set balances filtration efficiency with structural strength and is certified to NSF\/ANSI 50 safety standards for pool and spa materials.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these cartridges improve water clarity without increasing pressure?\u003c\/h3\u003e\n\n\u003cp\u003eThe Grefilt C4030 design uses a trilobal fiber weave that increases surface area and creates more branching points to trap particles while maintaining flow. That uniform fiber distribution reduces rapid clogging and helps keep pressure rise moderate between cleanings.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e30-micron precision filtration targets small particulates.\u003c\/li\u003e\n  \u003cli\u003eTrilobal fabric offers 40% more branches for particle capture.\u003c\/li\u003e\n  \u003cli\u003e425 sq.ft filtration area per cartridge extends run time.\u003c\/li\u003e\n  \u003cli\u003eSupport core prevents collapse and keeps flow steady.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these cartridges fit my Hayward or Pleatco-compatible filter?\u003c\/h3\u003e\n\n\u003cp\u003eThese cartridges are manufactured as compatible replacements for several common models (e.g., Hayward SwimClear C4030, Pleatco PA106 equivalents, Unicel C-7488 references). They match the common C4030 dimensions, but fit depends on your existing housing and seal orientation, so physical verification is recommended.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLength 25 1\/2\" and outside diameter 7\".\u003c\/li\u003e\n  \u003cli\u003eTop and bottom openings measure 3\" each.\u003c\/li\u003e\n  \u003cli\u003eCompatible with many SwimClear and equivalent cartridge housings.\u003c\/li\u003e\n  \u003cli\u003eCheck current cartridge dimensions before purchase to ensure fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long do these filters last and what improves their longevity?\u003c\/h3\u003e\n\n\u003cp\u003eGrefilt cartridges are built for extended life through thicker 5 oz filtration fabric, reinforced ABS end caps, and an integrated support core. Those construction choices reduce wear, resist deformation under pressure, and can extend service life by roughly 30% compared to standard cartridges under similar operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5 oz trilobal fabric resists rapid degradation and clogging.\u003c\/li\u003e\n  \u003cli\u003eHigh-strength ABS end caps resist cracking and leaks.\u003c\/li\u003e\n  \u003cli\u003eIntegrated support core maintains pleat spacing and structure.\u003c\/li\u003e\n  \u003cli\u003eLonger cleaning intervals with consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these cartridges safe for family pools and spas?\u003c\/h3\u003e\n\n\u003cp\u003eYes — materials were tested against NSF\/ANSI 50 standards to verify they are appropriate for use in pool and spa environments. Certification indicates the cartridge materials meet established guidelines for water-contact safety when used as directed, making them suitable for residential and family pools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNSF\/ANSI 50 tested materials for pool\/spa contact.\u003c\/li\u003e\n  \u003cli\u003eNo harmful substances released under normal use.\u003c\/li\u003e\n  \u003cli\u003eDesigned for regular household and community pool systems.\u003c\/li\u003e\n  \u003cli\u003eFollow manufacturer and local codes for installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Pool owners, service professionals, and maintenance teams who need reliable, high-area replacement cartridges compatible with common SwimClear-style housings. This 4-pack suits people who want longer intervals between cleanings, higher particle-capture efficiency around 30 microns, and NSF-tested materials for family pools. Confirm filter housing dimensions before buying to ensure the Grefilt C4030 cartridges will fit your system.\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: How often should I clean Grefilt C4030 cartridges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Clean when pressure rises 8–10 psi above clean baseline, or every 1–3 months depending on pool use and debris levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these originals or compatible replacements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They are compatible replacement cartridges designed to fit many SwimClear-style housings, not original equipment manufacturer parts.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Grefilt","offers":[{"title":"Default Title","offer_id":56801148535124,"sku":"B0DQPYQNRD","price":281.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/grefilt-front-packaging-c4030.jpg?v=1786739225","url":"https:\/\/gardenluxe.co.uk\/products\/grefilt-pool-filter-cartridges-c4030-4-pack-425-sq-ft-30-micron-trilobal-fabric-reinforced-end-caps","provider":"Gardenluxe Uk","version":"1.0","type":"link"}