Grefilt C100S Pool Filter Cartridge 100 sq. ft. — 30‑Micron, Reinforced Trilobal Fabric, Heavy‑Duty End Caps

The Grefilt C100S Pool Filter Cartridge is a 100 sq. ft., 30-micron replacement filter built with reinforced trilobal fabric and heavy-duty end caps to deliver longer life and reliable water clarity for compatible pool and spa systems.

If your pool filter housing takes a C100S-style cartridge and you want a cost-effective, NSF/ANSI 50-tested alternative, this Grefilt unit offers a balance of fine filtration, structural strength, and compatibility with many popular brands. Designed to match the dimensions of common Hayward and other equivalent cartridges, it aims to trap small particles while resisting premature collapse and clogging.

Will this cartridge fit my existing filter housing?

Measure your current cartridge before ordering: length, outside diameter, and opening dimension must match to ensure a proper seal and function. Grefilt designed this model to match many C100S-style housings used across multiple brands.

• Length: 19.5 inches; outside diameter: 10.125 inches.
• Top & bottom opening diameter: 4 inches each for alignment with standard end caps.
• Compatible references include Hayward SwimClear C100S variants and equivalents like Pleatco PA100S (verify model numbers).

How fine is the filtration and what materials are used?

This cartridge uses a 30-micron rating and a 5 oz trilobal filtration fabric with an upgraded branched fiber structure to improve particle capture and water flow. The fabric and construction choices are aimed at trapping finer debris while keeping pressure rises manageable.

• 30-micron nominal filtration for small particulate removal.
• 5 oz heavy-duty trilobal fabric with 40% more branched fibers for enhanced capture.
• Integrated support core and high-strength ABS end caps for durability.

How durable is the Grefilt C100S compared with typical cartridges?

The cartridge combines thicker media, reinforced end caps, and a supportive core to resist deformation and extend service intervals. These features collectively reduce the frequency of replacements under normal pool operating conditions.

• Thickened 5 oz media resists tearing and premature collapse.
• ABS end caps and internal core add structural stability under pressure.
• Manufactured to last up to about 30% longer than some standard replacement cartridges in similar use cases.

Is this cartridge safe for family pools and spas?

Materials used in this Grefilt cartridge are tested to NSF/ANSI 50 standards, which cover safety for materials that contact pool and spa water. The certification indicates the cartridge materials meet established safety criteria for residential and commercial aquatic environments.

• NSF/ANSI 50 tested for material safety in pool and spa applications.
• Designed to provide clean water without introducing harmful substances.
• Intended for typical residential and light-commercial systems when sized correctly.

Who is this for: The Grefilt C100S cartridge is aimed at pool owners, service technicians, and homeowners seeking a robust replacement for C100S-style filters who need reliable 30-micron filtration, longer media life, and NSF/ANSI 50-tested materials. It's a good choice if your filter housing matches the stated dimensions and you want improved particle capture with reduced clogging and extended intervals between cleanings.