Unicel Replacement Filter Cartridge 35 sf Rainbow | C-4335
Unicel
SKU: C-4335
Unicel Replacement Cartridge – 35 sq ft | Model C‑4335
The Unicel C‑4335 is a top-loading cartridge filter providing approximately 35 sq ft of filtration surface. Designed for Rainbow Dynamic Series IV (DFM/DFML), Waterway in-line applications, Bullfrog Spas, Pentair, and other compatible spa/pool systems.
Key Features:
- 35 sq ft of 3 oz spunbonded polyester (Reemay) media
- Approximately 219 sharp, uniform pleats for maximum dirt-holding capacity and flow
- Compact dimensions: ~4 15/16″ outer diameter × ~9 1/4″ length
- Top and bottom are open with 2 1/8″ inner diameter
- Captures debris down to ~20 microns while minimizing pressure drop
Technical Specifications:
- Model / SKU: C‑4335
- Filtration Area: ~35 sq ft
- Pleat Count: ~219
- Dimensions: OD ~4 15/16″ × Length ~9 1/4″
- End Caps: 2 1/8″ open ID top & bottom
- Media Weight: 3 oz/yard polyester
- Filter Rating: ~20 µm
Maintenance Tip: Rinse gently with a garden hose—avoid using pressure washers. Replace annually or if pressure rises or the media shows visible wear.
SKU: C-4335
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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