| 摘要 |
PROBLEM TO BE SOLVED: To solve problems, in renovating a bathroom drain or the like, that when an outer area of a waterproof pan of a drain trap is cut off for a repair, a bore diameter to be cut off becomes larger and it has to be taken out by a large drilling machine or a chipping work, water-resistant layer has to be mended since the water-resistant layer is cut off, more working processes in general are required for cutting off an outer surface of a drain fitting, therefore working hours become longer and furthermore, as cement is used, a curing time is required to be watched in proceeding the work. SOLUTION: A bottom part of the existing drain trap fitting is drilled to make a hole, into which a penetrating pipe is passed through and then a filling material is injected into the space made between the drilled hole and the penetrating pipe. COPYRIGHT: (C)2005,JPO&NCIPI
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