Unicel Replacement Filter Cartridge 120 sf Jacuzzi | C-9481
Unicel
SKU: C-9481
Unicel C-9481 – 120 sq ft Replacement Cartridge Filter
Product Overview
The Unicel C-9481 is a high-capacity replacement cartridge filter designed for spa and pool filter systems that originally used a 120 sq ft cartridge element. It features up to approximately 218 pleats and delivers efficient filtration and longer intervals between cleanings.
Key Features
- Approximately 120 sq ft of pleated media area.
- Durable spun-bonded polyester media for extended service life.
- Compatible with filter housings that call for C-9481 or equivalents (e.g., Jacuzzi Brothers Sherlock 120, etc.).
- Drop-in replacement – no modifications required when replacing a worn cartridge of the same size.
Technical Specifications
- Part Number: C-9481
- Media Area: ~120 sq ft
- Pleat Count: Approx. 218 pleats
- Diameter: ~10″ outer diameter
- Length: ~20-1/16″ (approx)
Applications & Compatibility
This cartridge is suitable for spa and pool filter systems originally equipped with a 120 sq ft cartridge specification. Prior to purchasing, please verify the filter tank’s existing cartridge size, dimensions, and part number to ensure compatibility.
Installation Instructions
- Turn off pump and relieve system pressure before servicing.
- Remove the old cartridge and inspect the housing interior for debris, damage or worn O-rings.
- Install the new C-9481 cartridge, making sure it seats correctly and aligns with the manifold or base plate.
- Close the filter housing, restore circulation and monitor gauge/pressure to ensure proper operation.
Troubleshooting
- High pressure soon after installation: Check return and suction valves, make sure the new cartridge is properly seated and there are no blockages or restricted flows.
- Cloudy water or low flow: Confirm the cartridge is correctly sized, pleats not compressed, and the filter lid gasket is sealing properly.
- Leaks at lid or base: Inspect O-rings, gaskets and ensure correct torque and alignment of housing after cartridge install.
Maintenance Tip
Rinse the cartridge periodically to remove debris and extend life. Use a cartridge cleaner annually as needed. Replace the cartridge when pleats become worn, media damaged or system pressure remains high after cleaning. Regular maintenance ensures longer life and better performance from your filtration system.
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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