Non Return Valve Type 2

The solution to the problems of flooding

Reasons to install backflow prevention device

The causes of backflow Back flow from the public sewer system is mainly caused by:
– overall under-sizing of the public sewers
– high peak flows in stormwater sewers or combined sewers due to short but intense rainfall (climatic trend throughout the world)
– increase of surface water runoff due to new construction (growing territorial urbanization), causing greater volume of flow
– overflow due to peaks of simultaneous flow in built up areas
– malfunctions or blockages downstream from the grid.