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.
