Jim,
I wanted to test mine on the Liberty, just to see how (and if) it worked.
A standard garden hose was attached to the outlet near the rear bumper and then I just placed the outlet end in the regular sewer pipe here at the Resort.
I only have a switch on the dash, which in my case is a momentary switch. So I simply held it in the on position until I heard the pitch change, which indicated that the tank was empty and was easily confirmed by the level indicator over the dash.
Since we have a single waste tank, the "work" for the macerator pump is minimal. There was no issue with anything clogging the garden hose.
It's nice to know that there is a backup plan and it works!