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.
PJB40 spa filter equivalents
Part number PJB40 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.
Jacuzzi C-7304 cartridge (OEM 42-3724-09), 7" (178 mm) × 13-11/16" (348 mm), 40 sq ft. Unicel C-7304, Pleatco PJB40.
Unicel C-7304
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-7304 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 | 42-3724-09 |
|---|---|
| Unicel | C-7304 |
| Pleatco | PJB40 |
| Filbur | FC-1450 |
| Size | 7" (178 mm) × 13-11/16" (348 mm), 40 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Jacuzzi section), PDF p.41 (printed p.37); spec table PDF p.15 (printed p.11) (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Jacuzzi Whirlpool Spas, printed p.39 (PDF p.20) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Jacuzzi spa filters · Which fitting you need · How to install it