公开(公告)号：US06705344B2

公开(公告)日：2004-03-16

申请号：US10098539

申请日：2002-03-18

申请人： Blair J. Poirier

发明人： Blair J. Poirier

IPC分类号： E03B102

CPC分类号： E03B7/04 ,  E03B7/045 ,  E03B7/09 ,  Y10T137/85938 ,  Y10T137/85954 ,  Y10T137/86171 ,  Y10T137/8782

摘要： The present invention relates to systems for circulating water in a potable water piping network to prevent the stagnation of water in this piping network. Several systems are disclosed wherein partitioned pipes, pumps, partitioned headers, check valves, and scoop inserts are used to keep the water in movement inside the pipes. The present invention comprises several pumping arrangements for circulating water inside fire hydrant laterals and inside the branch pipes along dead-end streets where most of the water stagnation occurs. Although partitioned pipes are used and opposite flows are induced in opposite pipe halves, full pipe flow to each hydrant is maintainable in case of emergency. Inside buildings, the water is kept in movement inside a loop pipe that extends close to each water outlet such that the water is maintained fresh at each outlet.