| 摘要 |
<p>PURPOSE: To perform the fluctuation of a pressure in a pipe by a method wherein a vent pipe to communicate together a space part situated upstream of a water faucet and a space part situated downstream thereof is arranged, in a fitting to bend a drainage route running between a drainage vertical pipe and a sanitary apparatus. CONSTITUTION: A drainage system through an extension pipe 52 is bent by a fitting 70 and a faucet W is generated. In which case, the water faucet W flows down at a strike. Through communication of space parts V1 and V2 situated upstream and a downstream of the water faucet W of a vent pipe 72 with each other, the pressure balance of the space part V2 is kept to prevent the occurrence of self-siphon. A cover 71 is integrally arranged on the vent pipe 72, and the cover 71 is removed, and a washing nozzle for cleaning is inserted through a cleaning port 70d into the fitting 70. Thus, the inner wall surfaces of the fitting 70, an extension pipe 52, and an upper socket 1a situated downstream, and the vent pipe 72 are easily cleaned. Further, the vent pipe 72 is arranged along a wall surface with which drain is collided and the drain is collided with the vent pipe 72 and branched into the right and the left for flow. This constitution suppresses the generation of the water faucet W.</p> |
