Simple unit typically equipped with a water tank and a suitable water pump. This to feed a front mounted device with spraying nozzles for cleaning the asphalt surfaces and sidewalks. On request special nozzles for dust debating and flower-beds irrigation.
The front spraying device (called also street washing bar) can be installed on standard Vacuum-Jetting units as well, provided that are fitted with a particular type of PTO (like the German MNV), able to operate the water jetting pump while the vehicle is moving at low speed.