Method for preventing overflow of cistern assigned to house or house group involves conducting overflow quantity of collected rainwater in channel pipe where cisterns are pumped sequentially

摘要

The method involves conducting overflow quantity of collected rainwater that exceeds a use volume (3) in channel pipe (6). Overflow quantity is pumped out of each cistern (2) or defined groups of cisterns one after the other. First cistern is pumped out at a fixed time after end of period or rain, as detected using water level sensor (5). Pumping is controlled using electronic unit (8).