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817-0020 spa filter equivalents
Part number 817-0020 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.
PDC Spas 4CH-15 cartridge (OEM FLT-1000-CART), 4-5/8" (117 mm) × 5-3/16" (132 mm), 15 sq ft. Unicel 4CH-15, Pleatco not listed.
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| OEM | FLT-1000-CART |
|---|---|
| Unicel | 4CH-15 |
| Pleatco | not listed |
| Filbur | not listed |
| Size | 4-5/8" (117 mm) × 5-3/16" (132 mm), 15 sq ft |
Sources
- PDC Spas (manufacturer filter guide, 2025): XD Series, XD1, XD1+ and XD2 cold side, 2024–present: FLT-1000-CART, 15 sq ft, 4-5/8" × 5-1/4", 1-1/2" SAE, bar handle, closed top, Waterway 817-0020 (PDF)
- Unicel 2026 Replacement Guide: Waterway line: 817-0020 = 4CH-15, 4-5/8" × 5-3/16", 1-1/2" SAE, 199 pleats, 3 oz, 15 sq ft. Spec table PDF p.6 (printed p.2): dual bar handle. (PDF)
Not in sources: Length 5-1/4" (PDC) vs 5-3/16" (Unicel). No Pleatco equivalent in the 2023 cross-reference. No Filbur PDC row. Top wording: PDC “bar type handle on closed top”; Unicel “dual bar handle.”.
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