| 摘要 |
PROBLEM TO BE SOLVED: To utilize a connection part between an existing waste water drain member and a water-resistant layer while suppressing a decline in drainage capacity, and to prevent an inflow of waste water into a gap between an existing water-resistant layer and a repairing water-resistant layer.SOLUTION: In a waste water drain member 1 comprising a piping part 10 connecting a drain port 6 with a drain pipe 7, a repairing drain support part 11 projecting inward is installed on the inside of the piping part 10, and the repairing drain support part 11 is formed over the whole circumference of the inner surface of the piping part 10 and has a support surface 12 abutted by the end face of a repairing drain 50. The repairing drain support part 11 has a plurality of levels, and a repairing drain support part 11b located on the side of the drain pipe 7 projects inner than a repairing drain support part 11a located on the side of the drain port 6.SELECTED DRAWING: Figure 1 |
