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PMT40 spa filter equivalents
Part number PMT40 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.
Dimension One Spas C-4340 cartridge (OEM 1561-03), 4-15/16" (125 mm) × 11-5/8" (295 mm), 40 sq ft. Unicel C-4340, Pleatco PMT40.
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| OEM | 1561-03 |
|---|---|
| Unicel | C-4340 |
| Pleatco | PMT40 |
| Filbur | FC-3081 |
| Size | 4-15/16" (125 mm) × 11-5/8" (295 mm), 40 sq ft |
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.8 (printed p.4) (PDF)
- Filbur Catalog & Reference Guide: Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17) (PDF)
- Hot Tub Outpost (retailer OEM listing): 01561-03: 4-7/8" x 11-5/8", 2-1/8" open top and bottom, 40 sq ft; 1994 Arena, Diamante and Quadra (web page)
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