This is what happens during a traffic jam
Before we delve deeper into the topic of backwater protection, let’s answer a fundamental question: what exactly do we mean when we talk about backwater? The term describes a phenomenon that occurs when more water is temporarily discharged into the sewer system than it can handle. This can happen, for example, during heavy rain or a flood. The wastewater then rises within the sewer system and inevitably spills out wherever it can – that is, from manhole covers and, in the worst case, from the drains, sinks and toilet in your basement.
Flooded basement?
That makes all the difference
During heavy rainfall, the water level rises above what is known as the backwater level. On flat terrain, this refers to the height of the top of the road surface plus a safety margin. Lower-lying rooms in the basement or cellar are quickly flooded as a result. This leads to significant damage and high costs. This must be prevented. No one wants to be forced to stand by helplessly and watch as foul-smelling wastewater with sewage floods their own basement and ruins the cellar fittings. To prevent precisely this, vulnerable drainage points must be protected against backwater. To this end, backflow preventers are installed in the relevant drainage pipes.
