Marine toilet- hand operated. There is a selector swich on the side, one positin brings in fresh water , the other position empties the bowl. I have to admit the thing looked a bit dubious when I first saw it. It has four
90deree bends in the out flow line, plus it is only 1 1/2" seemed kinda small to me. Not to be crude, seemed like a "big hairy" would get jammed in there first use.
My co-builder/ son and I had to test it. So we bench mounted it, figured out which way the selector switch worked. WOW we were blown away by the force this thing has- pretty soon we were trying to clog it. 6 cans of play dough in a larger than humanly posible "simulaturd" wouldn't do it- neither would 8. Should have made a video of us firing our test turd across the yard....
We eventually wound up clogging it- it took newspaper, and 5 cans of playdough. In the end I think it will be fine, wishing I had a larger black tank now- takes more water than I had hoped. Makes sence, marine applications have no water limitations. Something to keep in mind.
We still have our port-a-pot, we'll be keeping. With six of us we may need it. If our fresh water supply starts to get low we can switch.
The bathroom walls are in the works, I am a former interior house builder- I have something wild in mind.