Translations:Versickerung und Retention/76/en

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Drainage systems for the discharge of precipitation water from small properties, so long as the sewer network provider has given no other guideline, without a more effective run-off surface, are sufficient for DN 150 connection to the sewer. The rule applies in the same sense to infiltration systems designed according to DWA-A 138 with T = 5 a and a dimensioning rainfall according to KOSTRA-DWD-2010. It is assumed that due to terrain condition and architectural building plans no backed-up water from the system will penetrate into the connected or neighbouring buildings and exceed any other official regulations.

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