The Dometic VG4 features a J series vacuum generator. As the most powerful and efficient vacuum source for pleasure boat toilet systems, J series vacuum generators offer boat builders more reasons than ever to install premium VacuFlush toilet systems. Remotely installed outside of the head compartment, VacuFlush vacuum generators work much more quietly than macerator toilet motors. System-wide vacuum instantly clears the bowl the moment the VacuFlush toilet is flushed. Along with delivering the most efficient water and power consumption among electric heads, J series vacuum generators are easier to install than ever. Their small size and intake and discharge capabilities permit versatile placement to meet virtually any marine plumbing system configuration.