POOLPURE C-5374 Spa Filter Cartridge 1-Pack — 75 sq.ft. Trilobal, 50-Micron Fine Filtration

The POOLPURE C-5374 is a direct-fit replacement spa cartridge engineered to restore clear, sanitary spa water with 75 sq.ft. of trilobal filtration and 50-micron fine filtration.

If your spa’s water looks cloudy, your current cartridge is torn, or you want a longer-lasting compatible option, the POOLPURE C-5374 (1 pack) is built to match common OEM dimensions while improving dirt capture and rinsing performance. Designed as a compatible replacement for Unicel C-5374 and several equivalent models, this cartridge uses a trilobal fiber fabric and reinforced components to trap fine particles, reduce maintenance time, and extend service life compared with many standard filters.

How does the POOLPURE C-5374 improve spa water clarity?

The cartridge employs trilobal filtration fabric that increases surface area for particle capture and a 50-micron high-efficiency layer to remove very fine debris. Together they cut through hair, dust, sand, and organic matter that commonly cloud spa water, helping chemicals work more effectively.

• 75 sq.ft. filtration area for extended dirt-holding capacity
• 50-micron fine filtration removes up to 99% of fine particles
• Trilobal fibers provide three times more adsorption surface than standard fabric

Will this filter fit my spa and replace my Unicel C-5374?

The POOLPURE C-5374 is dimensioned to match the popular Unicel C-5374 and multiple alternate part numbers, so it fits most compatible housings without modification. Confirm your spa’s top and bottom opening sizes and overall length before ordering to ensure a proper seal and optimal performance.

• Length: 14 3/4"; outer diameter: 5-5/16"
• Top and bottom openings: 2-1/8" each for direct compatibility
• Cross-references: Pleatco PLBS75, Filbur FC-2971, Waterway 817-0015, and more

How does maintenance change with this replacement cartridge?

POOLPURE’s dirt-locking design makes trapped particles release more easily during rinsing, reducing the effort required to clean the cartridge. Durable construction also means fewer replacements over time, lowering lifecycle costs and downtime for your spa.

• Patented dirt-locking structure for easier rinsing
• Thickened 4 oz. polyester fabric with reinforced core for longer life
• Reusable after rinsing; reduces frequency of full replacements

Is this product safe and certified for pool and spa use?

POOLPURE filters are tested against NSF/ANSI 50 standards for material safety, ensuring components won’t leach harmful substances into long-term water exposure. The brand also partners with industry organizations and competitive swim programs to validate performance in demanding environments.

• IAPMO-tested to NSF/ANSI 50 material safety standards
• Industry-aligned: Pool & Hot Tub Alliance membership and athlete partnerships
• Used in training environments and media-reviewed for consistent performance

Who is this for? The POOLPURE C-5374 is aimed at spa owners, service technicians, and property managers seeking an affordable, OEM-compatible replacement that emphasizes finer filtration, easier maintenance, and longer service life. Choose this cartridge if you need a reliable, easy-to-install option that fits Unicel C-5374 equivalent housings, reduces filter-change frequency, and helps maintain clearer water between cleanings.