Unicel Replacement Filter Cartridge For 100 Sf Waterway/Coast Spas | C-5396
Unicel
SKU: C-5396
Unicel C-5396 Replacement Filter Cartridge – 100 sq ft
Part # C-5396 — a high-capacity replacement filter cartridge designed for spas and pools that use a 100 sq ft filtration element. This cartridge restores proper water flow, improves clarity, and helps maintain clean, balanced water by capturing fine debris and contaminants.
Key Features
- 100 sq ft of premium polyester filter media for strong dirt-holding capacity.
- Standard size: approximately 5-5/16″ outer diameter × 21-5/16″ length.
- Open-top and open-bottom design with 2-1/8″ inner diameter ports for easy installation.
- High pleat count for extended run time and improved filtration efficiency.
- Durable center core and reinforced end caps designed for long service life in both pool and spa environments.
Typical Applications
This replacement cartridge is commonly used in spa systems, portable hot tubs, and small residential pool filters that require a 100 sq ft element. Replace when the existing cartridge becomes worn, clogged, torn, or unable to maintain proper pressure and water clarity.
Installation & Compatibility Notes
Shut off the pump and release system pressure. Remove the old cartridge from the filter housing, clean the tank thoroughly and inspect the sealing surfaces. Insert the new C-5396 cartridge, ensuring proper alignment and seating. Reassemble the filter, restore circulation, and confirm normal operating pressure.
Why Choose This Cartridge?
The C-5396 offers reliable performance, long-lasting construction and a large filtration surface area, making it an ideal choice for restoring efficient filtration without replacing the entire filter system.
Maintenance Tips
- Clean the cartridge whenever system pressure rises 8–10 psi above the clean starting pressure.
- Rinse thoroughly with a hose and periodically deep-clean using a cartridge-safe solution to remove oils and scale.
- Inspect end caps and pleats regularly for cracks, tears or deformation.
- Consider rotating between two cartridges to prolong lifespan and reduce downtime during cleaning.
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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