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4CH-35 spa filter equivalents
Part number 4CH-35 appears in 2 cited cross-reference rows 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.
Hot Spring 4CH-35 cartridge (OEM 31382)
| OEM | 31382 |
|---|---|
| Unicel | 4CH-35 |
| Pleatco | — |
| Filbur | — |
| Size | 4-5/8" × 16", 35 sq ft |
⚠ 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.38; spec table PDF p.6 (PDF)
Sundance 4CH-35 cartridge (OEM 6540-486)
| OEM | 6540-486 |
|---|---|
| Unicel | 4CH-35 |
| Pleatco | — |
| Filbur | — |
| Size | 4-5/8" × 16", 40 sq ft |
⚠ 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.58; spec table PDF p.6 (PDF)