Unicel Replacement Filter Cartridge 30 sf Watkins | C-6430
Unicel
SKU: UNFC6430
Unicel C-6430 30 sq ft Replacement Cartridge Filter
The Unicel C-6430 is a premium 30 square-foot cartridge filter designed for spas and small-to-mid-size pool systems. It delivers reliable filtration, high dirt-holding capacity, and straightforward installation for hot tubs and compatible filter housings.
Key Features
- 30 sq ft filtration area — provides ample surface for efficient debris and particulate capture while maintaining good flow rates.
- 124 pleats for increased surface area and better dirt trapping compared to standard flat filters.
- 6″ outer diameter and 10.5″ length — compact size suitable for many spa and small-pool filter housings.
- Open-top and open-bottom 1 15/16″ inner diameter ports for easy installation and wet-end flow compatibility.
- Durable polyester media and chemical-resistant end caps — built to withstand repeated cleaning and spa/pool water conditions.
- Direct replacement for many OEM cartridges (e.g. for select Hot Springs / Watkins spas and systems using equivalents like Filbur FC-3915 or Pleatco PWK30).
Specifications
- Manufacturer: Unicel
- Part Number: C-6430
- Filter Type: Cartridge filter
- Filtration Area: 30 sq ft
- Outer Diameter: 6″
- Length: 10.5″
- Top & Bottom Port Inner Diameter: 1-15/16″ (open-end)
- Pleat Count: 124
- Media: Durable polyester filter cloth
- Application: Compatible spas, small pools, and filter housings originally using C-6430 or equivalent cartridges
Why Choose C-6430
Whether you’re replacing a worn cartridge or upgrading your spa’s filtration, the C-6430 offers a balance of strong flow and thorough filtration in a compact design. Its large pleated surface area extends filter cycles and helps maintain cleaner, clearer water — ideal for spas or small pools needing dependable, low-maintenance filtration performance.
Installation & Maintenance Tips
- Shut off the pump and relieve pressure before removing the old cartridge.
- Ensure the filter housing is clean before installing the new C-6430 cartridge — debris or buildup can reduce performance.
- Check that both top and bottom ports seat properly to ensure tight, leak-free flow.
- Rinse or soak the cartridge regularly (per spa/pool manufacturer recommendations) to extend service life, and replace when pleats become damaged, warped, or hardened.
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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