It is two years on the jets and diverters.
I wouldn’t worry too much about the warranty on the jets themselves due to the fact that they haven’t replaced more than 500 of their Fluidix/Vortex jets with over, I believe, 1,000,000 of them in the market in the last.
The diverters aren’t covered mainly because Sundance considers them a “wear item” like your headrests, filter, and filter cover.