Tier1 Pool Filter Cartridge Replacement for Pentair R173215 — 2-Pack, 23-5/8" x 10-1/16", High-Flow Trilobal Media

Tier1 Replacement for Pentair R173215 Pool Filter Cartridge (2-pack) is a direct-fit, high-flow pool filtration cartridge designed to trap more debris and maintain steady water circulation for compatible pool systems.

Keep your pool water clear without changing your filtration setup: this Tier1 two-pack replaces Pentair R173215 and a wide range of equivalent cartridges, fitting into common canister filters with the same 23-5/8" x 10-1/16" dimensions. Constructed with trilobal fibers and a reinforced core, these cartridges capture fine particles while preserving pump efficiency. They’re independently tested for durability and performance, making them a practical swap when your existing element is worn or clogged.

What models will this Tier1 cartridge replace?

These replacement cartridges are made to work with many popular original-equipment filter part numbers. If your system lists any of the referenced model numbers, this Tier1 cartridge is engineered as a compatible substitute that installs the same way as the original.

• Direct replacements: Pentair R173215, Clean & Clear 100
• Aftermarket equivalents: Pleatco PAP100-4, Unicel C-9410, Filbur FC-0686
• Other listed cross-references: 59054200, Predator 100, PCRP100, C9410

How does the trilobal media improve filtration?

The cartridge uses trilobal-shaped fibers rather than simple round strands, increasing surface area and mechanical trapping ability. That geometry captures a higher proportion of dirt and organic matter while still allowing water to pass freely, which reduces strain on the pump.

• Higher particle capture compared with standard round fibers
• Efficient removal of hair, leaves, and fine sediment
• Maintains strong flow to protect pump and heater performance

Will these cartridges fit my filter and maintain proper flow?

With a specified size of 23-5/8" tall and 10-1/16" diameter, these Tier1 cartridges are engineered for a reliable, leak-free fit in compatible housings. They include a reinforced internal core that sustains consistent circulation and prevents collapse under normal operating pressure.

• Exact dimensions designed for seamless installation
• Internal high-flow core preserves steady water movement
• Reduces risk of pressure spikes or flow restriction

Has this replacement been independently tested?

Yes — the Tier1 cartridges have been evaluated against established performance protocols to verify durability and filtration capability. Independent testing helps confirm these elements will perform as expected when installed and maintained properly.

• Tested to recognized NSF-related standards for consistency
• Built to withstand regular pool cycles without rapid breakdown
• Quality checks on media and core to ensure long service life

Who is this for? Pool owners and service technicians who need a dependable, affordable replacement for Pentair R173215 and its equivalents will find this Tier1 two-pack useful. It suits residential and light-commercial filters that require the specified 23-5/8" x 10-1/16" cartridge, particularly when improved debris capture and sustained flow are priorities. Choose these cartridges when you want an easy swap that restores filtration performance without altering your existing plumbing or equipment setup.