Bosch's VAC090A nine-gallon vacuum increases dust extraction performance and decreases the loss of suction by offering an automatic filter cleaning mechanism that self cleans the flat pleated filter through a reverse airflow every 15 seconds during operation. It is compatible with Bosch’s click & go system and the vacuum hose can be attached to dust collection guards and shrouds with either the friction fit power tool adapter or clicked together with the quick connect system. The VAC090A features a wet vacuuming water level sensor that protects the motor by automatically shutting down the device when water reaches a maximum height during wet applications. Users are able to add the VF120H HEPA filter to create an EPA compliant HEPA vacuum.