| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage system for a toilet bowl apposition unit capable of ensuring optimum carrying performance to a vertical drain pipe by exhibiting the force of pushing out a solid matter satisfactorily with a small quantity of flushing water. SOLUTION: The drainage system has a plurality of wall drain type toilet bowls 1A, 1B and 1C apposed, and drains drainage from the respective toilet bowls 1A, 1B and 1C to the vertical drain pipe 3 through one horizontally drawing piping 2. The pipe diameter of the horizontally drawing piping 2 is set to 75 mm, and the gradient of the horizontally drawing piping 2 from the upstream toilet bowl 1A to the vertical drain pipe 3 is set to a steep gradient exceeding 1/75. COPYRIGHT: (C)2007,JPO&INPIT
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