Unicel Replacement Filter Cartridge 80 sf | C-5397
Unicel
SKU: C-5397
Unicel C-5397 Replacement Spa Filter Cartridge – 35 Sq Ft (Sundance / Jacuzzi Style)
The Unicel C-5397 is a premium 35 sq ft pleated spa filter cartridge commonly used in select Sundance / Jacuzzi spa filtration systems. It’s designed to restore proper circulation and water clarity when your existing cartridge is worn, torn, or no longer cleans effectively after cleaning cycles.
Key Features
- 35 sq ft filtration area for strong debris capture and steady spa circulation
- Durable pleated media and rigid core built for repeated rinsing and deep-cleaning
- Common service replacement for spas that use this cartridge size and end-cap style
- Helps reduce cloudiness and improves overall filtration efficiency when replaced on schedule
Specifications
- Part Number: C-5397
- Filtration Area: 35 sq ft
- Outside Diameter: 5"
- Length: 13-5/16"
- Top End Cap: Open
- Top Inside Diameter: 2-1/8"
- Bottom End Cap: Open
- Bottom Inside Diameter: 2-1/8"
Replaces / Cross References
- Pleatco: PJW35
- Filbur: FC-2976
- Sundance / Jacuzzi: 6540-488, 6540-501 (verify by measurements and end-cap style)
- Other common references: Darlly 50351, Aladdin 14511, Excel XLS-351, Spa-Daddy SD-00173
When to Replace
- Pleats are torn, frayed, or separating from end caps
- Cartridge stays restrictive even after a deep clean and thorough rinse
- Water stays cloudy despite balanced chemistry and routine maintenance
- End caps are cracked/warped or the core is collapsing
Related Products
- Unicel C-5397 (Shop / Options)
- Pleatco PJW35 (Alternate)
- Filbur FC-2976 (Alternate)
- Spa Cartridge Filter Cleaner
- Cartridge Cleaning Wands
- Spa Water Test Strips
Maintenance Tips
- Rinse filters frequently (weekly for heavy use) to prevent restriction and keep jets performing well.
- Deep clean every 3–6 weeks using a cartridge cleaner to remove oils; rinse thoroughly before reinstalling.
- If scale is present, degrease first, then treat for scale; rinse completely before returning to service.
- Rotating between two cartridges can extend filter life and improve overall filtration performance.
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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