Tier1 Spa Filter Cartridge Replacement for Waterway 817-0050 — 2-Pack, Trilobal High-Flow 7-5/8" x 6"

Tier1 Replacement for Waterway Spa Filter 817-0050 (2pk) is a direct-fit pleated spa cartridge engineered to trap fine debris while preserving steady water circulation in compatible front-access skimmer systems.

Designed as a direct replacement for Waterway 817-0050 and cross-compatible with popular part numbers (Pleatco PWW50, Filbur FC-0359, Unicel 6CH-940 and others), this two-pack offers dependable filtration for spas and hot tubs that use front-access skimmer cartridges. The cartridge measures 7-5/8" x 6" and uses trilobal dirt-lock fibers with an engineered high-flow core to balance filtration efficiency and pump protection.

Will this Tier1 cartridge fit my Waterway front-access skimmer?

Yes — the cartridge is dimensioned and shaped to fit standard Waterway front-access skimmer housings that call for the 817-0050 style cartridge. Check your skimmer opening and core diameter to confirm fit before purchasing.

• Dimensions: 7-5/8" height x 6" outer diameter for reliable seating
• Compatible part cross-references included for quick comparison
• Designed to prevent leaks and gaps when properly installed

How does the trilobal media improve filtration versus ordinary cartridges?

The cartridge uses trilobal-shaped fibers that increase surface area and mechanical trapping capability versus round fibers. That geometry captures more hair, fine debris and suspended particles while still allowing water to pass through with less resistance.

• Trilobal dirt-lock media captures up to 40% more debris than standard round-fiber filters
• Maintains higher dirt-holding capacity so cartridges last longer between cleanings
• Optimized to retain flow and reduce strain on pumps and heaters

Does this replacement affect pump performance or water flow?

No — the internal high-flow core is engineered to deliver steady circulation while filtering effectively. It reduces the chance of flow restriction that can stress pumps or reduce heater efficiency when compared with poorly designed cartridges.

• High-flow internal core supports consistent water movement
• Balanced media-to-core ratio prevents excessive pressure drop
• Helps maintain pump and heater operation when cartridges are clean

Is the Tier1 cartridge tested for quality and durability?

The cartridge has been tested to NSF 50 protocols for performance and durability, providing independent verification that it meets recognized filtration standards for spa and hot-tub applications.

• NSF 50–tested to confirm filtration performance benchmarks
• Manufactured to consistent dimensions to ensure repeatable fit
• Sold as a two-pack for convenient replacement scheduling

Who is this for: Spa owners, maintenance technicians, and hot-tub retailers seeking a reliable, cost-effective replacement for Waterway 817-0050 style cartridges will find this Tier1 2-pack useful. It’s ideal for systems that prioritize steady flow and improved debris capture without modifying plumbing or skimmer housings. Choose this cartridge if you want an NSF-tested alternative compatible with many common part numbers and sized for front-access skimmers.