The balancing tank is a temporary storage unit that has the purpose of regulating the flow of rainwater discharged into the final receptor (public sewer, ditch, watercourse,…). This is in order to discharge a flow that does not exceed the limit specified by the regional and local governments and/or the water authority. The rainwater is fed to the balancing tank with pump through an inlet pipe and is discharged to the receptor by a submersible pump. The discharge flow rate of the pump can be controlled using a manual valve located on the pump delivery pipe. In this manner, in the case of heavy rainfall, the water exceeding the pump discharge rate is stored temporarily in the tank and released over a longer period of time. Balancing tanks are required in all those areas where a high soil impermeability overloads stormwater sewerage systems, ditches or natural watercourses, thus creating rainwater disposal problems, above all during severe meteorological events. 

USE: Temporary storage of rainwater collected from an impermeable surface (roads, car parks, roofs, coverings in general, warehouses, pavements, etc.) during a meteorological event. 

REFERENCE REGULATIONS: Local regulations, for example: City of Trento: instructions for sizing balancing tanks – January 2011 Section 3 of Regional Decree 53 dated 27/01/2014, Marche Region