Unicel Replacement Filter Cartridge 112 sf Hayward CX875XRE | C-7489
Unicel
SKU: C-7489
Unicel C-7489 Replacement Cartridge Filter – 112 Sq Ft (Fits Hayward SwimClear C4025 / C4520 – 4 Required)
The Unicel C-7489 is a high-quality 112 sq ft replacement cartridge filter element used in select Hayward SwimClear and Super Star-Clear cartridge filter systems. It features open ends with molded gaskets to seal on a center standpipe, helping maintain strong flow and clear water when cleaned on a regular schedule.
Key Features
- 112 sq ft filtration area per cartridge
- Open top & open bottom with molded gasket sealing surfaces
- Captures fine debris to improve clarity while supporting steady circulation
- Ideal replacement when pleats are worn, torn, or no longer clean up effectively
Specifications
- Part Number: C-7489
- Filtration Area: 112 sq ft
- Outside Diameter: 7"
- Length: 25-1/2" (25.5")
- Top End Cap: Open with molded gasket
- Top Inside Diameter: 3"
- Bottom End Cap: Open with molded gasket
- Bottom Inside Diameter: 3"
- Pleat Count: 185
Compatible Filter Applications
- Hayward SwimClear: C4025, C4520 (commonly uses (4) cartridges)
- Hayward Super Star-Clear: C-4500 (commonly uses (4) cartridges)
- OEM Reference: Hayward CX875XRE / CX875RE (verify by measurements and end-cap style)
Replaces / Cross References
- Pleatco: PA112
- Filbur: FC-1275
When to Replace
- Filter pressure rises quickly after cleaning or flow remains weak
- Pleats are torn, frayed, or separating from the end caps
- End caps/gasket areas are cracked, warped, or won’t seal properly
- Water clarity doesn’t improve despite proper chemistry and routine cleaning
Related Products
- Unicel C-7489 (Shop / Options)
- Hayward SwimClear Tank O-Rings & Gaskets
- Cartridge Filter Cleaner
- Cartridge Cleaning Wands
- Filter Pressure Gauges
- Silicone Pool Lube (for O-rings)
Maintenance Tips
- Clean cartridges when pressure rises about 8–10 PSI above your clean starting pressure (or when flow drops).
- Rinse between pleats from top to bottom and rotate the cartridge as you clean for a more thorough rinse.
- Deep clean periodically to remove oils; if scale is present, degrease first, then treat for scale and rinse thoroughly.
- Inspect tank and cartridge sealing surfaces each service; replace worn O-rings and lubricate lightly with silicone lube.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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