Check out this link...
After reading these forums while shopping for a toilet we changed our minds about the Kohler because of it's poor cleaning ability and are now looking at Toto.
Some of the different models have different flushing mechanisms and I really not clear on the differences. Can someone explain?
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014