It happens time and again: during a severe storm or heavy rainfall, the sewer system cannot remove the sheer volume of water fast enough. The water pushes back from the sewer into residential houses or commercial buildings, and it is not uncommon for rooms at basement level and sometimes those at ground floor to be flooded. The consequences: considerable damage combined with high costs and, last but not least, plenty of hassle. But remedial action is not difficult at all. A backwater protection system effectively prevents sewer system water from entering the house. Depending on the requirements at hand, there are different types of protection.