METHOD AND DEVICE FOR DELAYING THE RUN-OFF OF FLASH-STORM WATER OR ORDINARY RAINWATER FROM ROOFS AND OTHER SURFACES WITH A WATER-RETENTION CAPABILITY

摘要

in order to retain water on the roofs of buildings (1) comprising a holding tank (7), a choke (17) is placed in holders on the flat roof (3) and is connected to a pipe (11) leading to the installation of drainage.the choke (17) allows for eddy flow rainwater to a quantity determined by its size, per unit of time. in the case of heavy rain, water is suppressed.an overflow pipe (35), which may be mounted on the neck of vorticity (17) and allows the water to flow under the bottleneck bottlenecks in the holders (17).alternatively, it is also possible to take a section of the pipeline (11) up to the height of maximum restraint and take the water exceeds the height down directly to the pipeline (11).