Unicel 4CH-24 Spa/Pool Filter Cartridge (25 sq ft)
The Unicel 4CH-24 is a high-quality replacement filter cartridge commonly used in spas and small pool filtration systems. It offers reliable filtration performance, helping keep water clear by capturing debris, oils, and fine particles.
Key Features
- 25 sq ft of pleated filter media — enough surface area for effective filtration on smaller pools or spas.
- 173 pleats with spun-bonded polyester media — enhances dirt-holding capacity and maintains strong flow.
- Compact size (about 9.75″ long × 4.625″ outer diameter) — fits many common spa and small pool filter housings.
- Top-load design with molded cone handle — makes cartridge removal and replacement quick and easy.
- Bottom end cap with 1.5″ MPT threaded outlet — works with standard spa/pool plumbing configurations.
- Chemical-resistant and designed for repeated cleaning cycles without degradation of media.
Specifications
- Manufacturer: Unicel
- Part Number: 4CH-24
- Filtration Area: 25 sq ft
- Pleat Count: 173
- Outer Diameter: ~4.625″
- Length: ~9.75″
- Top Cap: Molded cone handle (top-load style)
- Bottom Cap: 1.5″ male-thread (MPT) outlet
- Media: Spun-bonded polyester filter media
- Typical Use: Spa and small pool cartridge filters, hot tubs, compact filtration systems
When to Replace / Use
Use the 4CH-24 when the existing cartridge is clogged, pleats are compressed or damaged, or filtration performance declines (e.g., reduced flow, cloudy water, more frequent cleanings). It’s also ideal as a spare cartridge for regular maintenance cycles on spas or smaller pools.
Maintenance & Care Tips
- Rinse the cartridge regularly (every 2–4 weeks depending on use) to remove trapped debris and prolong media life.
- Periodically soak or deep-clean the cartridge with a spa-safe filter cleaner to remove oils, lotions, and organic buildup that normal rinsing cannot remove.
- Inspect pleats and end caps for tears, media collapse, or chemical wear — replace if any damage is observed.
- Keep a spare cartridge on hand — rotating filters allows one to dry between uses and extend overall cartridge life.
