I have the 26HE and it doesn't have the flush. We looked at a bunch of Freedom Elites and the standard stuff seems to basically all be the same.
I made a rookie mistake after my first two trips. Left the black tank valve open and wasn't using enough water. Wanted to be prepared for the next trip and bought the Camco Sewer Rinse. Hopefully, I'll never have to actually use it.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1