Advanced Spa Design hot tub filters
The Unicel 2026 Replacement Guide lists 2 of the cartridges on this site for Advanced Spa Design. Many tubs use only one of these, so measure your old filter or check the number printed on its end cap.
| Cartridge (Pleatco / Unicel / Filbur) | Diameter × length | Sq ft | Models | Advanced Spa Design OEM # | Source |
|---|---|---|---|---|---|
| PGS25P4 / 4CH-24 / FC-0131 | 4-5/8" x 9-3/4" | 25 | not specified | not listed | Unicel p.26 |
| PTL47W-P4 / 6CH-47 / FC-0315 | 6" x 8-1/2" | 47 | not specified | not listed | Unicel p.26 |
If your Advanced Spa Design filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.