| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pipe joint for by-pass ventilation and a drainage system using the pipe joint for by-pass ventilation improving the reliability of connection by allowing compact connection of by-pass ventilation even in a narrow pipe space and reducing construction time and labor by managing with a small number of joints. <P>SOLUTION: The pipe joint for by-pass ventilation comprises a main pipe part having a vertical pipe connection part for connecting vertical drain pipes upward and downward, and a branch pipe part with one end opened to the side face of the main pipe part and with the other end having a vent pipe connection part. The branch pipe part has an inclined part having an opening to the main pipe part and extending obliquely upward at an inclination angle of 5°to 45°with respect to a pipe axis of the main pipe part, and a rising part having a pipe axis parallel with the pipe axis of the main pipe part and connected to the inclined part. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
