This water distributor is placed at the highest point of Pompeii (42 m) and, through its connection with the Augustan aqueduct of Serino, near Avellino, the water supply was guaranteed to the entire city. The structure allows you to appreciate the high level of development achieved by hydraulic engineering at the time: the castellum had a large circular basin within, served by a pipeline found on the north side, and fitted with a gate system and breakwaters, which adjusted the water distribution accordingly. The water used the drop pressure to be conveyed from here towards three pipes at different heights. If necessary, these could be closed with wooden wedges.

The structure was damaged by the earthquake in 62 AD and does not seem to have been in use at the time of the eruption in 79 AD, unlike the 40 fountains distributed around the city.

Date of excavation: 1902.