Mascerator Pump

I also have a flo jet and it works as advertised, pumps uphill, etc. The only thing I wonder about is, does it properly drain the black water tank? When you use your big hose at a dump station, you get that sucking action to drain almost everything out of the tank. When the flo jet is used, you pull the handle, the waste drains down to the flo jet and then the pump is turned on and it does its thing then. There is no sucking action that I have ever seen. By the way mine uses a 3/4 inch hose.