Grefilt C3030 Pool Filter Cartridges 4-Pack — 325 sq ft, 30‑Micron Trilobal, NSF/ANSI 50 Direct-Fit

Grefilt C3030 pool filter cartridges are a 4-pack of NSF/ANSI 50–certified replacement cartridges delivering 325 square feet of 30-micron trilobal filtration for compatible pool and spa systems.

These cartridges are designed as direct-fit, high-capacity replacements for many common models (including Hayward C3020/C3030, Pleatco PA81 equivalents, Unicel C-7483 and Filbur FC-1225/FC-6425). Built from a thick 5 oz trilobal fabric with reinforced end caps and a support core, the Grefilt C3030 set focuses on improved particle capture, reduced clogging and longer life under typical pool operating conditions. They are tested to NSF/ANSI 50 standards to confirm materials safe for pool and spa contact.

How do these cartridges improve water clarity without restricting flow?

The Grefilt cartridges use a trilobal fiber fabric engineered for uniform fiber distribution and a 30-micron rating, which balances fine particle removal with stable flow. The design captures more debris per square foot while minimizing pressure spikes that shorten service intervals.

• 325 sq. ft. filtration area per cartridge for large dirt-holding capacity
• 30-micron precision filtration to trap fine particulates
• Trilobal fibers with 40% more branching for improved capture efficiency
• Thick 5 oz fabric reduces frequent clogging and pressure buildup

Will the Grefilt C3030 cartridges fit my existing filter housing?

These cartridges are sized to match many popular tank filters, but fit depends on your model and measured dimensions. The key specs are 19 3/4" length, 7" outside diameter and 3" top/bottom openings — confirm your current cartridge measurements before buying.

• Length: 19 3/4" — measure end-to-end of your current cartridge
• Outside diameter: 7" — check housing clearance and internals
• Top & bottom opening: 3" — verify center core connector compatibility
• Compatible references include Hayward SwimClear C580E series, Pleatco PA81, Unicel C-7483, Filbur FC-1225/FC-6425

How durable are these cartridges and how often will I need to replace them?

Grefilt C3030 cartridges are constructed with reinforced ABS end caps and an integrated support core to withstand pump pressure and handling. The thicker 5 oz media and stronger build typically extend service life versus standard cartridges, though replacement frequency depends on pool load and maintenance habits.

• High-strength ABS end caps resist cracking during installation and cleaning
• Integrated support core adds structural stability under pressure
• Extended life claimed up to ~30% longer than standard cartridges under similar conditions
• Recommended: inspect during routine maintenance and replace when cleaning no longer restores flow

Are these cartridges safe for family pools and spas?

Yes — the materials used in these cartridges have been evaluated to NSF/ANSI 50 standards, which assess safety for pool and spa use. That means the construction avoids harmful substances that could transfer to water, when used as intended.

• NSF/ANSI 50 tested to confirm safe materials for pool contact
• Compatible with typical chlorinated and brominated pool chemical regimes
• Designed to maintain water quality by removing fine particulates
• Always follow your pool system manufacturer’s chemical and maintenance guidance

Who is this for: Homeowners and pool service professionals seeking a high-capacity, long-life replacement cartridge for common filter housings. Ideal for medium to large residential pools or spas that need improved debris capture without frequent cartridge swaps, and for anyone who needs NSF/ANSI 50–tested materials for family pool use. Verify your current cartridge dimensions and model compatibility before purchasing to ensure a proper fit.