Unicel Replacement Filter Cartridge for 75 sf Caldera Spa | C-7479
Unicel
SKU: C-7479
Unicel C-7479 Replacement Spa Filter Cartridge – 75 Sq Ft (Caldera 33017 Style)
The Unicel C-7479 is a premium 75 sq ft replacement cartridge filter commonly used in select Caldera / Watkins spa filtration systems. It features a top carry handle and a 2" male slip bottom connection for proper seating in compatible filter canisters. Replacing an aged or damaged cartridge helps restore circulation, improve water clarity, and reduce strain on the pump and heater.
Key Features
- 75 sq ft pleated filtration area for strong debris capture and good flow
- Top: semi-circular carry handle for easy removal
- Bottom: 2" male slip fitting for correct alignment/connection in compatible housings
- Durable pleat media and rigid inner core designed for repeated cleanings
Specifications
- Part Number: C-7479
- Filtration Area: 75 sq ft
- Outside Diameter: 7"
- Length: 14-3/4" (cartridge body; handle not included in length measurement)
- Top End Cap: Handle (closed)
- Bottom End Cap: 2" Male Slip
- Pleat Count (typical): 216
Compatible / Replaces
- Caldera / Watkins: 33017 (commonly referenced as “older style” 75 sq ft filter)
- Pleatco: PCD75
- Filbur: FC-3085
- Darlly: 70752
- Baleen: AK-6050
- Aladdin: 17523
When to Replace
- Pleats are torn, frayed, or separating from end caps
- Cartridge won’t clean up well after a deep soak and thorough rinse
- Flow is reduced or pressure rises quickly after cleaning
- End caps are cracked/warped or the core is collapsing
Related Products
- Unicel C-7479 (Shop / Options)
- Pleatco PCD75 (Alternate Cartridge)
- Filbur FC-3085 (Alternate Cartridge)
- Spa Cartridge Filter Cleaner
- Cartridge Cleaning Wand
- Spa Water Test Strips
Maintenance Tips
- Rinse the cartridge regularly (weekly for heavy use) to prevent restriction and keep jets flowing strong.
- Deep clean with a cartridge cleaner to remove oils; rinse thoroughly before reinstalling.
- If scale is present, degrease first, then use a scale treatment (never reverse the order) and rinse well.
- Rotating between two cartridges (one in use, one drying after cleaning) can extend overall filter life and improve 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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