Our macerator is permanently installed in our ACE 29.2 coach. Its a CleanDump system.
RV Macerator Pump & RV Waste Disposal Accessories It takes only 3 minutes to dump both tanks. No connections or spills or rubber gloves. Put the hose in the hole, open the valve on the end of the hose, pull the blackwater valve, turn on the pump, when empty pull the grey water valve, when empty turn off the pump, close tank valves, close hose valve, and coil the hose back in its storeage bin. You just have to be sure not to run the pump without water in it or the rubber impeller will melt from the heat of dry friction.