Yes, they all take the same. You can't see the impeller until you tear the unit totally apart. Looking in the outlet pipe you can see the macerator blade, but not the impeller. You need to take the cone shaped end of the pump off completely to replace the impeller ring and the gasket.
Been there, done that. Several times. Ours lasted about 2-2.5 yrs each for full-timer use, until I stopped using the Sanicon when parked for an extended period. For long stays, I hook up a slinky style dump hose.
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX, Motosat HD-SL5 w/ SWM-8, Multiswitch, HR34 Genie
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake