Dimension One Hot Tub Replacement Filters
Dimension One Spas (D1, based in San Diego) has been making premium hot tubs since the 1970s. Filter sizing across the @home, Reflections, and Bay Collection lines is reasonably consistent, and the cartridges cross-reference cleanly to standard Pleatco numbers.
The 3 Dimension One models below cover the production we've verified.
3 models indexed below
Dimension One
→Nautilus
6-person · 2000-present
Dimension One
→Reflection
7-person · 2000-present
Dimension One
→Triad
5-person · 2000-present
Quick tip: the fastest way to confirm the right cartridge is to pull yours and read the part number off the end cap. The owner's manual is the backup if the printing has worn off.