Automatic Macerator Pump on Airstream Interstate

In shopping for a used B to replace my '87 Falcon, I looked at a '16 Airstream Interstate (more than I can afford, but it was great!). We don't have push-button anything on our Falcon! It had an automatic macerator pump that makes "dumping" a breeze. Is this feature available on PW, LTV or other models? If yes, anyone know what year did this became available?