Home › Jacuzzi › C-7304 cartridge (OEM 42-3724-09)
Jacuzzi OEM 42-3724-09 spa filter (C-7304)
Listed for: Jacuzzi CE Filter — unverified
Fits Jacuzzi OEM 42-3724-09 unverified
Ø 7"L 13-11/16"40 sq ft| Unicel | C-7304 |
|---|---|
| Pleatco | not found in source |
| Filbur | not sourced |
| Top | 3" / open w/ step |
| Bottom | 3" / open w/ step |
Retailer search links — see disclosure. Verify dimensions before ordering.
How to confirm this is your filter
Pull your current cartridge and measure it end to end, including any handle, and across the widest point of the pleats. This cartridge measures 7" in diameter and 13-11/16" long, with a 3" / open w/ step on top and a 3" / open w/ step on the bottom. The bottom fitting matters most: a cartridge with the right diameter but the wrong thread or open-end size will not seal in the filter housing, letting unfiltered water bypass the media.
The 40 sq ft rating describes the pleated media area. Jacuzzi housings are designed around a particular cartridge, so choose a replacement with the same size and fittings rather than a larger area rating. We did not find a Pleatco equivalent for C-7304 in the Pleatco 2023 cross-reference, so search by the Unicel or OEM number.
Similar-diameter Jacuzzi cartridges
- C-7306 cartridge (OEM 42-3725-08) — 7" × 17-11/16"
- 6CH-960 cartridge (OEM 6540-164) — 6-3/4" × 15-1/2"
- 6CH-961 cartridge (OEM 6540-164) — 6-3/4" × 15-1/2"
⚠ Unverified / possible conflict: this row has not been fully confirmed against a second source. Gaps: no Pleatco equivalent found in Pleatco 2023 xref p.43; no Filbur equivalent sourced; no model-year range in source. Measure your old cartridge before ordering.
Sources
- Unicel 2026 Replacement Guide — OEM Cross Reference, PDF p.40; spec table PDF p.14 (PDF)