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.
Dimension One Spas OEM 1561-02 spa filter (7CH-752)
Dimension One Spas
Replacement numbers
Unicel 7CH-752, Pleatco PTL75XW-F2M
Fits Dimension One Spas OEM 1561-02.
Diameter 7" (178 mm)Length 14-3/4" (375 mm)75 sq ft4 models listedUnicel 7CH-752
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| Unicel | 7CH-752 |
|---|---|
| Pleatco | PTL75XW-F2M (as printed in the Filbur catalog Dimension One Spas section (printed p.33); not found in the Pleatco 2023 Unicel cross reference) |
| Filbur | FC-0470 |
| Top | semi-circular handle |
| Bottom | 2” male thread/MPT |
Bottom: 2” male thread/MPT
Drawn to scale from the listed diameter and length. Handles, threads and closed ends are drawn as symbols, not to scale. 75 sq ft media.
Dimension One Spas is the group name on the Dimension One Spas row 7CH-752 cartridge (OEM 1561-02). Match these numbers: OEM 1561-02; Unicel 7CH-752; Pleatco PTL75XW-F2M; Filbur FC-0470. 7" across, 14-3/4" long, top semi-circular handle, bottom 2” male thread/MPT, 75 sq ft.
PTL75XW-F2M is the Pleatco string Filbur prints next to 7CH-752 (OEM 1561-02) on printed p.33. PTL75XW-F2M itself is absent from Pleatco’s 2023 Unicel cross-reference.
Dimension One Spas applications recorded for this cartridge: Dimension One Platinum Series, years 1992–1994, listed by Hot Tub Outpost OEM listing; Dimension One Californian SL, years 1993–1994, listed by Hot Tub Outpost OEM listing; Dimension One Elite SL, years 1993, listed by Hot Tub Outpost OEM listing; Dimension One Seville SL, Ultra Series, Legend Series, years 1994, listed by Hot Tub Outpost OEM listing.
Before ordering 7CH-752, compare it with 7CH-552 differs by Unicel 7CH-552, no Pleatco number, no Filbur number, 10-1/2" long, 52 sq ft, OEM 1561-10, note says Unicel's Dimension One cross reference rates 1561-10 / 7CH-552 at 75 sq ft, but Unicel's own spec table rates 7CH-552 at 52 sq ft (7" x 10-1/2", 2" MPT, semi-circular handle), and both retailer listings (Hot Tub Outpost and SpaStore) give 52 sq ft at 7" x 10-1/2" with a 2" MPT bottom; 52 is shown. Both retailers name Pleatco PTL55XW-F2M and Filbur FC-0465 as equivalents, but the Pleatco 2023 catalog lists PTL55XW-F2M among its deactivated part numbers with no replacement (PDF p.24) and the Filbur catalog does not list FC-0465, so neither is shown as a current equivalent. Hot Tub Outpost lists the 1994 Arena and Diamante under this part, while its 01561-03 listing also names the 1994 Arena and Diamante; check the old cartridge.; and 7CH-975 differs by Unicel 7CH-975, Pleatco PDO75P3, Filbur FC-0475, 10-1/2" long, bottom 1-1/2" SAE thread, OEM 1561-12.
Pages checked for 1561-02: Unicel 2026 Replacement Guide on 7CH-752 (OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.15 (printed p.11)). Filbur Catalog & Reference Guide on 7CH-752 (Product by Pool/Spa Manufacturer (OEM), Dimension One Spas, printed p.33 (PDF p.17)). Hot Tub Outpost (retailer OEM listing) on 7CH-752 (01561-02: 7" x 14-3/4", handle, 2" MPT fine thread, 75 sq ft; 1992–1994 Platinum Series, 1993–1994 Californian SL, 1993 Elite SL, 1994 Seville SL, Ultra and Legend Series; replaces Unicel 7CH-752, Filbur FC-0470, Pleatco PTL75XW-F2M).
Hot tubs listed for this cartridge
The rest of the Dimension One Spas model list is the Dimension One Spas filter by model and year lookup.
| Model / system | Years | Listed by |
|---|---|---|
| Dimension One Platinum Series | 1992–1994 | Hot Tub Outpost OEM listing |
| Dimension One Californian SL | 1993–1994 | Hot Tub Outpost OEM listing |
| Dimension One Elite SL | 1993 | Hot Tub Outpost OEM listing |
| Dimension One Seville SL, Ultra Series, Legend Series | 1994 | Hot Tub Outpost OEM listing |
Check the cartridge you removed
Measure diameter, length, and both ends, then compare them with the figures above. The steps are in the measuring guide. Why the bottom decides whether it seals: open-end vs threaded filters. Power, the retainer, and not running the spa empty: how to install a cartridge. Number formats: how Filbur, Unicel and Pleatco numbers compare.
Other Dimension One Spas cartridges
- 7CH-552 cartridge (OEM 1561-10), 7" (178 mm) × 10-1/2" (267 mm)
- 7CH-975 cartridge (OEM 1561-12), 7" (178 mm) × 10-1/2" (267 mm)
- C-7367 cartridge (OEM 1561-00), 7-1/8" (181 mm) × 10-1/2" (267 mm)
- C-5404 cartridge (OEM 1561-09), 5-1/2" (140 mm) × 17" (432 mm)
- C-7335 cartridge (OEM 1561-01), 7-1/8" (181 mm) × 5-7/8" (149 mm)
- 4CH-50 cartridge (OEM 1561-05), 4-5/8" (117 mm) × 14-3/4" (375 mm)
All 12 Dimension One Spas spa filters
Every number on this row, on one screen: cross-reference lookup. Published clean and replace intervals for this cartridge, and a buy link for the numbers above: replacement schedule and reorder. The interval comparison by brand: calculator.
Cleaner and test strips
Hose rinse and soak steps are in how to clean a cartridge. Named cleaners and strips are in filter cleaners and test strips.
Filter cleaner and test strips
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Leisure Time O Filter Clean Cartridge Cleaner Listing title: cartridge cleaner, 32 fl oz.
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SpaGuard Filter Cleaner Listing title: filter cleaner for spas and hot tubs, 1 quart.
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AquaChek SPA 6-in-1 Test Strips Listing title: reads total bromine, total chlorine, free chlorine, pH, total alkalinity and total hardness.
Unicel 7CH-752 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.
Sources
- Unicel 2026 Replacement Guide: OEM cross reference (Dimension One Spas section), PDF p.33 (printed p.29); spec table PDF p.15 (printed p.11) (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): 01561-02: 7" x 14-3/4", handle, 2" MPT fine thread, 75 sq ft; 1992–1994 Platinum Series, 1993–1994 Californian SL, 1993 Elite SL, 1994 Seville SL, Ultra and Legend Series; replaces Unicel 7CH-752, Filbur FC-0470, Pleatco PTL75XW-F2M (web page)