| 摘要 |
PURPOSE: A packing is provided to perfectly seal a gap between a drain pipe and a coupling by combining with an outside of the drain pipe. CONSTITUTION: A combining groove having an inclined face is formed inside a packing(30). A body of the packing(30) is inserted in a guiding groove(12). A combining groove is combined with a protruding portion(11). The packing(30) is combined by surrounding the outside of a spiral pipe(10). Thereby, the combination of the pipes are finished conveniently and a gap between a coupling(20) and the pipe(10) is sealed completely. Moreover, a leakage of wastewater is prevented.
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