Translations:Regenwassernutzung/245/en

Lift stations as well as backflow valves are subject to maintenance during operation and must therefore be accessible by inspection openings. Additionally note that due to pump defects or continuing backwater no water can be pumped from the storage even though water continues in. For exceptional uncontrolled overflows with outdoor cisterns, a water outlet, which can be located in the cistern lid, is acceptable. Ingress of the water into a building e.g. through the empty pipe must be securely excluded.