Unicel Replacement Filter Cartridge 25 sf | 4CH-24
Unicel
SKU: UNF4CH24
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.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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