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.
FC-0161 spa filter equivalents
Part number FC-0161 appears in 2 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.
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 4CH-35 cartridge (OEM 31382), 4-5/8" (117 mm) × 16" (406 mm), 35 sq ft. Unicel 4CH-35, Pleatco PTL35-4.
Unicel 4CH-35
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| OEM | 31382 |
|---|---|
| Unicel | 4CH-35 |
| Pleatco | PTL35-4 |
| Filbur | FC-0161 |
| Size | 4-5/8" (117 mm) × 16" (406 mm), 35 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Hot Spring section), PDF p.39 (printed p.35); spec table PDF p.7 (printed p.3) (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
Sundance 4CH-35 cartridge (OEM 6540-486), 4-5/8" (117 mm) × 16" (406 mm), 40 sq ft. Unicel 4CH-35, Pleatco PTL35-4.
Unicel 4CH-35 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.
| OEM | 6540-486 |
|---|---|
| Unicel | 4CH-35 |
| Pleatco | PTL35-4 |
| Filbur | FC-0161 |
| Size | 4-5/8" (117 mm) × 16" (406 mm), 40 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Sundance section), PDF p.59 (printed p.55); spec table PDF p.7 (printed p.3) (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Sundance, printed p.51 (PDF p.26) (PDF)
Not in sources: no model/model-year fitment in sources.
Full details → · All Sundance spa filters · Which fitting you need · How to install it