Home › Caldera › C-7375 cartridge (OEM 1019301)
Caldera OEM 1019301 spa filter (C-7375)
Listed for: Caldera (Watkins) new style
Fits Caldera OEM 1019301, 73531 cited
Ø 7"L 14-3/4"75 sq ft| Unicel | C-7375 |
|---|---|
| Pleatco | PCD75N |
| Filbur | not sourced |
| Top | semi-circular handle |
| Bottom | 2-11/16" / open |
Retailer search links — see disclosure. Verify dimensions before ordering.
Source note: Unicel lists 75/100 sq ft against this OEM
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 14-3/4" long, with a semi-circular handle on top and a 2-11/16" / open 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 75 sq ft rating describes the pleated media area. Caldera housings are designed around a particular cartridge, so choose a replacement with the same size and fittings rather than a larger area rating. Unicel C-7375 and Pleatco PCD75N are cross-referenced to each other in the Pleatco 2023 catalog, so either should fit the same housing. Caldera has used 2 OEM numbers for this cartridge; any of them should map to the same replacement.
Similar-diameter Caldera cartridges
- C-7350 cartridge (OEM 1019401) — 7" × 10-3/4"
- C-7451 cartridge (OEM 033016) — 7" × 10-3/4"
- C-7479 cartridge (OEM 033017) — 7" × 14-3/4"
Sources
- Unicel 2026 Replacement Guide — OEM Cross Reference, PDF p.29; spec table PDF p.15 (PDF)
- Pleatco 2023 Catalog — Unicel-to-Pleatco cross reference, PDF p.43 (PDF)
Not in sources: Unicel lists 75/100 sq ft against this OEM; no Filbur equivalent sourced; no model-year range in source.