The Challenge

Flood protection is also necessary underground so that flood water does not come  through the “back door“, i.e. through the sewer, to flood streets and houses. Streams and rivers overflow their banks more often, more inten-sively and faster due to large impermeable areas and loss of flood plains. The warning and reaction times are shorter; sand bag barriers and manually-operated valves are time-consuming and labour intensive.

The Way 

All overflow sills, inlets and outlet sewers in combined and stormwater networks can be secured with Hydro-Latch^® flood gates to prevent flooding of the sewer network. The flood gates work automatically and without electricity. The HydroLatch^® flood gates also allow a safe overflow from combined and stormwater networks during rain. Even if the HydroLatch^® flood gates are flooded, drainage occurs as long as the water pressure in the sewer network is higher. The special Steinhardt^® seal is reliable and durable. All HydroLatch^® flood gates  are project-designed so that the gate cover is light (low resistance = large flow-rate) but heavy enough to prevent lifting by flow velocity.