Grefilt Pool Filter Cartridges C4030 4-Pack — 425 sq.ft, 30‑Micron Trilobal Fabric & Reinforced End Caps

Grefilt'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.

These 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.

How do these cartridges improve water clarity without increasing pressure?

The 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.

• 30-micron precision filtration targets small particulates.
• Trilobal fabric offers 40% more branches for particle capture.
• 425 sq.ft filtration area per cartridge extends run time.
• Support core prevents collapse and keeps flow steady.

Will these cartridges fit my Hayward or Pleatco-compatible filter?

These 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.

• Length 25 1/2" and outside diameter 7".
• Top and bottom openings measure 3" each.
• Compatible with many SwimClear and equivalent cartridge housings.
• Check current cartridge dimensions before purchase to ensure fit.

How long do these filters last and what improves their longevity?

Grefilt 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.

• 5 oz trilobal fabric resists rapid degradation and clogging.
• High-strength ABS end caps resist cracking and leaks.
• Integrated support core maintains pleat spacing and structure.
• Longer cleaning intervals with consistent performance.

Are these cartridges safe for family pools and spas?

Yes — 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.

• NSF/ANSI 50 tested materials for pool/spa contact.
• No harmful substances released under normal use.
• Designed for regular household and community pool systems.
• Follow manufacturer and local codes for installation.

Who 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.