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: 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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