Why it matters
The Guardian Filtration Products 810-235-01 Spa Filter Cartridge is a replacement spa and hot tub filter cartridge that its listing says replaces Pleatco PWK65, Unicel C-8465, Filbur FC-3960, with 65 sq ft of media.
Match the part number on your old cartridge or filter housing first; if it has worn off, measure length, outside diameter and both center holes. A cartridge that is close but not exact can let dirty water bypass its seals.
The listing gives dimensions of 11 x 9 x 9 inches and a weight of 2.44 pounds.
Who it's for, and who should skip it
Good fit if
- Spas and hot tubs
- Owners with the original part number
Look elsewhere if
- Filters with a different part number
Pros and cons
Pros
- Replaces Pleatco PWK65, Unicel C-8465, Filbur FC-3960
- 65 sq ft of media
Cons
- Check length and hole sizes against your old cartridge
- Third-party cartridges rely on the seller's fit statement
Limitations to weigh
- Specifications are the maker's or seller's own; check fit against your equipment's manual and part numbers.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Product weight | 2.44 lb | Retailer |
|---|---|---|
| Dimensions (seller) | 11 x 9 x 9 inches | Retailer |
| Model number | 810-235-01 | Retailer |
| Replaces | Pleatco PWK65, Unicel C-8465, Filbur FC-3960 | Retailer |
| Filter area (maker) | 65 sq ft | Retailer |
Alternatives worth comparing
More pool and spa filter cartridges we cover
Final verdict
A solid spa cartridge for spas and hot tubs.
Where to buy
Our links open this exact model's product page. Prices and stock change; check what's included before you order.
Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure