Unicel Replacement Filter Cartridge 25 sf Rainbow In-Line | C-4625
Unicel
SKU: C-4625
Unicel C-4625 25 sq ft Replacement Pool/Spa Filter Cartridge
The Unicel C-4625 is a compact replacement filter cartridge designed for spas, hot tubs, and small pool filtration systems. It provides 25 square feet of pleated filtration media to trap debris and help maintain clean, clear water in smaller systems.
Key Features
- 25 sq ft of pleated polyester media for efficient fine-particle filtration.
- Open-end design for simple installation and removal.
- Durable polyester construction designed for repeated cleaning.
- Chemical-resistant materials suitable for chlorinated or bromine spa environments.
- Compact size ideal for spas, hot tubs, and small pool applications.
Specifications
- Brand: Unicel
- Part Number: C-4625
- Filtration Area: 25 square feet
- Outer Diameter: Approx. 4-15/16"
- Length: Approx. 13-5/16"
- Openings: Approx. 2-1/8" inner diameter (top and bottom)
- Media: Pleated polyester
When to Replace
Replace when water clarity decreases, system pressure increases, or the cartridge shows signs of wear such as collapsed pleats or damaged end caps. Regular replacement helps maintain proper circulation and filtration in spa or small pool systems.
Maintenance Tips
- Rinse regularly to remove trapped debris.
- Deep-clean periodically with a cartridge-safe cleaner to remove oils and sunscreen buildup.
- Inspect pleats and ends each time you clean the filter.
- Keep a spare on hand to rotate filters and extend service life.
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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