| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage trap piping, shortening the distance for passing a metallic wire in a Kantool method. SOLUTION: This drainage trap piping for discharging water of a tank includes: a drainage device 1 having a drainage port 2 and an outflow port 3; a trap part 4 provided on the downstream side of the outflow port and forming a water sealing part by bending the pipe body ; an upstream pipe part 5 communicating the drainage port 2 and the trap part 4 with each other; a trap downstream pipe part communicating the trap part 4 and the underfloor pipe; a by-pass pipeline 6 connected from the drainage port 2 provided in the drainage device 1 to the trap downstream pipe part and not passing the trap part 4; and a cap member 7 water-tightly closing the by-pass pipeline 6 and removably attached to the by-pass pipeline 6 to be taken out from the drainage port 2. The pipe body forming the trap part 4 is formed flat. COPYRIGHT: (C)2005,JPO&NCIPI
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