Tier1 Pool Filter Cartridge Replacement for Hayward C1100 - 2-Pack Trilobal High-Flow

Tier1's 2-pack replacement cartridge fits Hayward C1100-style filters and uses trilobal fiber media to trap more debris while preserving steady water flow.

Keep your pool water clear without hassle: these Tier1 replacement cartridges are made to drop into systems that accept Hayward C1100 and equivalent models. Each cartridge measures 23-5/16" x 8-1/2" and pairs an engineered high-flow core with advanced trilobal dirt-capture media, giving longer run times between cleanings while protecting pumps and heaters from flow restriction.

Will this cartridge fit my Hayward C1100 or compatible filter?

Yes — the cartridge is designed to match the critical dimensions and connection style for Hayward C1100 and many cross-reference models. Check measurements and model numbers before ordering to ensure a correct fit.

• Nominal size: 23-5/16" length by 8-1/2" diameter
• Cross-references include Star Clear IIC1100, Filbur FC-1290, Pleatco PA100, Unicel C-8610 and others
• Sold as a 2-pack so you can replace both cartridges at once

How does trilobal media improve filtration compared with standard cartridges?

Trilobal fibers have a three-lobed profile that increases surface area and creates more mechanical trapping points, so they capture finer particles with less pressure drop. That means clearer water between cleanings and fewer strain cycles on your filtration system.

• Higher dirt-holding capacity versus round fibers
• Captures hair, leaves, fine sediment, and organic debris
• Maintains better flow to protect pumps and heaters

Is this cartridge durable and safe for pool equipment?

These cartridges are manufactured to consistent tolerances and tested to recognized performance standards to help ensure long life and reliable operation. The robust core supports steady circulation, avoiding the pressure spikes that can lead to equipment strain.

• Internal high-flow core for uniform water circulation
• Constructed to withstand routine cleaning cycles
• Independently tested to NSF 50 performance protocols

How do I maintain and clean these replacement cartridges?

Routine maintenance is straightforward: rinse debris with a garden hose and periodically soak in a recommended cartridge cleaner for deeper removal of oils and scale. Replace both cartridges as needed when pleats show permanent staining or damage.

• Hose off from top to bottom after pump shutdown
• Use a cartridge-cleaning solution for oily or mineral buildup
• Inspect pleats and core; replace when integrity is compromised

Who is this for: Pool owners and service professionals who need a dependable, ready-to-install replacement for Hayward C1100-style filter cartridges. Choose this Tier1 2-pack if you want improved debris capture from trilobal fibers, a solid high-flow core to protect pumps and heaters, and cartridges sized to fit common cross-reference models.