Listing we opened and checked. Match the diameter, length and both fittings on this page before you order. The price is on Amazon; we do not print one.
PKW30V spa filter equivalents
Part number PKW30V appears in 1 cross-reference row below. Each row lists the OEM, Unicel and Pleatco numbers that the source documents treat as interchangeable, plus the cartridge size so you can confirm against your old filter.
The same numbers, on one page, are in the cross-reference lookup. A schedule for this part number, and the buy link, are on the replacement schedule and reorder page. Published intervals by brand are in the replace and clean calculator.
Hot Spring C-5431 cartridge (OEM 31233), 5-1/8" (130 mm) × 10-1/4" (260 mm), 30 sq ft. Unicel C-5431, Pleatco PKW30V.
Unicel C-5431
Disclosure: we may earn a commission from qualifying purchases made through retailer links on this site, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Check price on Amazon opens the Unicel C-5431 listing we checked. These are affiliate links. Product photos are omitted unless Amazon supplied one through the Product Advertising API or a SiteStripe image link. Verify dimensions before ordering. See our affiliate disclosure.
| OEM | 31233 |
|---|---|
| Unicel | C-5431 |
| Pleatco | PKW30V |
| Filbur | FC-3910 |
| Size | 5-1/8" (130 mm) × 10-1/4" (260 mm), 30 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.10 (printed p.6) (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Hot Springs, printed p.38 (PDF p.20) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Hot Spring spa filters · Which fitting you need · How to install it