| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drain system by which inspection of the space under a floor and work for laying new pipes under the floor are improved. <P>SOLUTION: A drain header is placed under the floor of a building. The drain header and each drainage facility in the building are connected to each other by the intermediary of a drainage branch pipe line. An outflow port of the drain header and a drainage pipe line outside the building are connected to each other by the intermediary of a main drainage pipe line. In the drain system which is thus structured, the drainage branch pipe line connecting each drainage facility and the drain header to each other is formed by a single flexible pipe having no joint in the middle. The pipe ends of the flexible pipe are connected to an inflow port of the drain header and the outflow port of the drainage facility by the intermediary of a detachable joint even after completion of construction, and the inflow port of the drain header is formed to serve also as a cleaning port of the header. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
