VRT provides the suction and the depuration of rainwater in the manholes of fuel storage tanks installed by fuel stations and other commercial areas. The purpose of VRT is to avoid the contamination of terrains and groundwater through collection of contaminated rainwater with a peristaltic pump, treating in oil separator and conveyance of treated waste water to the sewerage system. Although VRT system is conceived for suction and depuration of the water within the manholes, it can be also used in other closed areas interested by infiltration of water potentially polluted.