The connection pipe for the installation of the drainage pipe on the roof of the apartment building is central to the setting of the upper and lower drainage pipes, which can be accurately positioned. In order to firmly set the upper and lower drainage pipes, the key places on the high bank are designed to carry out the interior stone materials (2) at the lower end of the main body (1) of the access pipe Forming eccentric through hole (4)Two adjusting plates (3) are arranged. On the connecting pipe through the eccentric through hole (4) through the lower drainage pipe (14), the upper inclined Chin (6) and the lower inclined Chin (7) are installed on the adjusting plate (3), and the reverse direction of the lower inclined Chin (7) forms the auxiliary inline (8) of the inclined Chin (8)The outer surface of the upper end of the inline (5) is provided with a roller groove (9), which is formed with the roller group (12) formed on the next surface of the barrel type upper adjusting cover (10). The flange (11) of the adjusting cover (10) is a flexible composition of the upper end of the connecting pipe body (1), which is carried out in the technical field of manufacturing and sales of building auxiliary materials yes.
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