| 摘要 |
PROBLEM TO BE SOLVED: To provide drainage trap piping which can carry out the cleaning of a pipe at a downstream location of a trap by a Kantool method or a high-pressure water cleaning method by performing operation from inside the drainage trap piping, and particularly from inside a drain port. SOLUTION: The drainage trap piping is provided for discharging drainage from the drain port 1 formed on the bottom surface of a tank body, and formed of the drain port 1, the trap 2 arranged on the downstream side of the drain port 1, a trap upstream pipe connecting the drain port 1 to the trap 2, and a trap downstream pipe connecting the trap 2 to an underfloor pipe. Further the drainage trap piping is comprised of a bypass pipe line which is formed in the drain port 1 and extends from the drain port 1 to the trap downstream pipe without passing the trap 2, and a cap member 3 detachably attached to the bypass pipe line for watertightly blocking the bypass pipe line. COPYRIGHT: (C)2004,JPO&NCIPI
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