Automatic device that cleans and sanitises the suction system. The Automatic Cleaning Vacuum System (ACVS ) flushes the cannulae with water and then hygienizes them with a liquid drawn from a dedicated tank. Fast, convenient sanitisation The automatic system that carries out suction system sanitisation cycles (about 1 minute) between one patient and another is activated by using the external tank. The assistant inserts the relative connectors, located on the unit body, in the suction cannulae. Optional on all Stern Weber dental units.