Grefilt Pool Filter Cartridges 420 sq.ft 4-Pack — 30‑Micron Trilobal Fabric, Reinforced End Caps

Grefilt CCP420 is a 4-pack of 420 sq.ft pool filter cartridges engineered to fit Pentair Clean & Clear Plus 420-style housings and deliver fine 30-micron filtration with durable trilobal fabric.

Upgrade your pool’s circulation and clarity with a set of four replacement cartridges designed to mirror the size and performance of popular 420 sq.ft models. These Grefilt cartridges are built from thickened trilobal filtration fabric and reinforced end caps for longer service life and more consistent flow. They are tested to NSF/ANSI 50 standards for material safety and constructed to capture fine particles while resisting clogging.

How do these cartridges improve water clarity?

The Grefilt CCP420 uses a 30-micron filtration rating and a trilobal fiber weave that increases particle capture without causing excessive pressure buildup. That means finer debris is trapped while your pump maintains steady circulation.

• 30-micron precision media captures fine suspended particles
• Trilobal fibers increase surface contact and capture efficiency
• Uniform pleat spacing sustains flow and reduces premature clogging

Will these fit my existing Clean & Clear Plus 420 filter housing?

These cartridges are sized to the common 420 sq.ft configuration and designed to replace several OEM part numbers, but you should confirm dimensions before ordering. The key measurements match most 420-style assemblies.

• Length: 26 inches; Outside diameter: 7 inches
• Top and bottom opening: 3 inches for hub compatibility
• Measure your current cartridge to ensure correct fit

How durable are these replacements compared to standard cartridges?

Grefilt engineered these cartridges with a heavier 5 oz trilobal fabric, upgraded ABS end caps, and a reinforced support core to withstand pressure and handling. That construction extends usable life and reduces the frequency of replacement cycles.

• 5 oz heavy-duty filtration fabric resists wear and tearing
• High-strength ABS end caps provide secure sealing under load
• Integrated support core maintains pleat shape and stability

Are these cartridges safe for family pools and spas?

The materials used were evaluated to meet NSF/ANSI 50 material safety criteria, indicating they were tested for product safety in pool and spa applications. This helps ensure the cartridges won’t leach unsafe substances into the water under normal use.

• NSF/ANSI 50 certified for material safety in pool products
• Manufactured with non-toxic, pool-compatible components
• Intended for use in residential and light-commercial pools

Who is this for? These Grefilt CCP420 cartridges suit pool owners and service professionals seeking an affordable, high-capacity replacement for 420 sq.ft filter systems. They’re especially useful for backyard pools that need reliable fine filtration, operators who want longer intervals between cleanings, and anyone replacing worn OEM cartridges with a durable, certified alternative. Always verify your filter housing dimensions and hub type to ensure compatibility before purchase.