Jul 11, 2018 - 10:44 AM
I apologize for the extremely delayed response but we still wanted to reply.
The compatibility chart does list that Kohler Santa Rosa may not be compatible with some of our Bio Bidet non-electric units. This is due to most non-electric units having a larger side control arm. However, the USPA-6800 will be compatible with the Kohler Santa Rosa. I would recommend to take measurements regardless just to be on the safe side. These measurements are located on the same page as the compatibility chart.
Bio Bidet Customer Support