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: 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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