We recently bought a Sea Ray 300 Sedan Bridge with a unique head.  The previous owner had holding tank issues, so he removed the holding tank and replaced the toilet with a manual port-a-potty that has PVC pipe to the pump-out fitting.   We are strongly considering getting a Purasan system.  Will we need to replace the toilet?  If needing to replace the toilet, is there one that is the most compatible with the Purasan system and no holding tank?  Thank you.  We are extremely new to the big boating scene.
				
			 
	