Tier1 Pool Filter Cartridge Replacement for Pentair R173214 2-Pack — Trilobal High-Flow, NSF-50 Tested

Tier1 Replacement for Pentair R173214 is a direct-fit 2-pack pool filter cartridge engineered with trilobal dirt-lock media to capture more debris while preserving steady water flow.

If your pool uses a Clean & Clear 75 or similar filter housing, these Tier1 cartridges deliver a reliable, drop-in replacement sized to the same specifications as Pentair R173214. Built with a reinforced core and high-efficiency pleated media, they are tested to NSF 50 protocols for performance and durability. The package contains two cartridges so you can swap both filters at once and restore filtration efficiency quickly.

How do these cartridges improve filtration without reducing flow?

The Tier1 design combines a high-flow internal core with trilobal synthetic fibers that trap fine particles without presenting excessive resistance to water. The pleat pattern is optimized to keep surface area high while allowing water to pass freely, protecting pumps and heaters from undue strain. Independent testing confirms consistent circulation under typical pool conditions.

• High-flow internal core maintains steady water circulation.
• Trilobal fiber shape captures up to 40% more debris than round fibers.
• Optimized pleat spacing prevents pressure spikes and flow restriction.
• Engineered to fit existing housings for easy replacement.

Will these fit my filter housing and match Pentair R173214 dimensions?

Yes — each cartridge measures 16-1/8" by 10-1/16", matching the footprint of Pentair R173214 and other listed cross-reference models. The end caps and pleat geometry are manufactured to align with common adapters and seals, delivering a leak-resistant fit. Always compare measurements before installing to confirm compatibility.

• Dimensions: 16-1/8" (height) x 10-1/16" (diameter).
• Designed as a direct replacement for Pentair R173214 and equivalents.
• Compatible with Clean & Clear 75 housings and listed cross-references.
• Drop-in installation avoids modifications or adapters in most systems.

What maintenance and performance can I expect from the trilobal media?

Trilobal fibers present multiple contact surfaces that trap hair, leaves, and fine particulate more effectively than traditional round fibers. This results in longer intervals between cleanings and improved clarity while preserving hydraulic performance. Routine rinsing with a hose restores most capacity; a periodic deep soak removes embedded oils and finer residues.

• Traps more debris for extended cleaning intervals.
• Hose-rinseable for quick upkeep; deep clean recommended occasionally.
• Helps maintain pump efficiency by avoiding clogged pleats.
• Durable construction reduces need for premature replacement.

Are these cartridges certified or independently tested?

Tier1 cartridges have been evaluated to NSF 50-related performance protocols to verify durability and filtration characteristics relevant to recreational water. While NSF testing covers aspects of structural performance and material longevity, follow local pool regulations and maintenance schedules for operational compliance. Test results support consistent water clarity when cartridges are used and maintained as directed.

• Independently tested to NSF 50 protocols for performance and durability.
• Quality control measures ensure consistent dimensions and pleat integrity.
• Intended to meet expectations of residential and light-commercial pools.
• Use per manufacturer guidance for best results and longevity.

Who this is for: Pool owners and service professionals who need a reliable, cost-effective replacement for Pentair R173214 and equivalent cartridges. If you want improved debris capture without sacrificing circulation, a tested alternative that fits Clean & Clear 75 housings, or a two-pack for synchronized filter maintenance, these Tier1 cartridges are a practical choice. Confirm measurements against your existing cartridge before purchase.