| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage device for preventing deposition of water scale, garbage, etc. and growth of mold around a drain outlet tool.SOLUTION: A drainage device comprises a drain outlet tool 3 that is attached to an aperture formed at a tank bottom 2a and is connected to a drain channel formation pipe 4. The drain outlet tool 3 comprises: a flange part 3c that contacts from above with an aperture periphery of the tank bottom 2a; a tubular trunk 3a that is arranged so as to penetrate the aperture and has an inner periphery forming a water passage; and a water channel that communicates from the vicinity of the tank bottom 2a at the flange part 3c to the drain channel formation pipe 4 side.SELECTED DRAWING: Figure 5 |
