POOLPURE spa filter cartridge PLF4CH-24 – 25 sq ft, 50-micron trilobal fabric, replacement for Pleatco PGS25P4

The POOLPURE PLF4CH-24 is a direct-fit spa and small pool replacement cartridge using trilobal filtration fabric to capture fine debris and restore clear, swim-ready water.

If your spa or small pool is cloudy or the existing cartridge is worn, the PLF4CH-24 is designed as a compatible, higher-efficiency alternative to Pleatco PGS25P4 and a range of OEM equivalents. Built for repeated rinsing and long service life, this cartridge combines a 25 sq. ft. filtration area with a 50-micron fine layer and reinforced end caps to reduce maintenance frequency while improving water clarity.

How does the PLF4CH-24 improve water clarity in everyday use?

The filter uses a trilobal fiber weave that increases the active surface area, which captures more particles per pass than standard fabrics. That design helps trap hair, leaves, dust and sand while keeping flow consistent so your circulation system isn’t overworked.

• 25 sq. ft. filtration area for increased dirt-holding capacity
• 50-micron fine filtration layer captures very small particles
• Trilobal fibers provide three times the adsorption surface versus typical filter cloth
• Patented dirt-locking structure eases rinsing and debris release

Will this cartridge fit my spa system and replace Pleatco PGS25P4?

Yes—POOLPURE PLF4CH-24 is engineered to match critical dimensions and connection types used by Pleatco PGS25P4 and many compatible models. The cartridge’s top handle and 1 1/2" MPT bottom thread match common filter housings for straightforward installation.

• Length: 9 3/4" and Outside Diameter: 4 5/8" for direct compatibility
• Top handle for easy removal and a 1 1/2" MPT bottom thread
• Cross-compatible with Unicel 4CH-24, Filbur FC-0131M, and others
• Independent brand engineered to meet OEM fit and function

How durable is the POOLPURE cartridge and what maintenance does it require?

The cartridge is built with 4 oz. thickened polyester fabric, reinforced ABS end caps, and a strengthened core to extend lifetime and resist collapse. Dirt-locking technology and a rinse-friendly fabric mean routine maintenance is quicker and more effective.

• Heavy-duty construction lasts about 30% longer than standard cartridges
• Easy to rinse—trapped debris releases cleanly under water pressure
• Reusable between replacements; reduces overall replacement frequency
• NSF/ANSI 50 tested materials for safety in long-term water exposure

What certifications and endorsements back this filter’s performance?

POOLPURE filters are tested to industry safety standards and supported by aquatic partnerships that stress reliability under heavy use. While not a medical product, the cartridge’s materials and build quality are independently certified and routinely used in demanding training environments.

• NSF/ANSI 50 material safety testing through IAPMO
• Proud partner of Florida Gators Swimming & Diving for high-performance use
• Tested in real athlete environments and covered by media for consistent results
• Member of the Pool & Hot Tub Alliance (PHTA) for industry best practices

Who is this for? Owners of hot tubs, small pools, and residential spa systems looking for a reliable, higher-efficiency replacement cartridge will benefit from the POOLPURE PLF4CH-24. It’s aimed at homeowners and property managers who want improved clarity, longer filter life, and easier maintenance without altering existing plumbing or filter housings. If you use a Pleatco PGS25P4 or one of the compatible OEM models and need a cost-effective, performance-minded replacement, this cartridge is designed to fit and perform.