Unqualified. Because the bathroom needs at least two pipes, one thick and one thin, the thick one is the sewage pipe, which can discharge all the dirt, and the thin one is the exhaust pipe, which can not only remove the odor and waste gas generated in the bathroom, make the indoor environment more comfortable, but also help the sewage pipe reduce the air pressure and ensure that the water seal is not damaged, so the two pipes have their own functions and are indispensable.

Precautions for installation of toilet sewage pipe:

1, after the pipeline enters the construction site, it is necessary to arrange staff to inspect each pipeline to see if there are cracks, defects, non-compliance and unusable problems.

2, when installing the pipeline, to clean up the oil and rust in the pipe socket, so as not to affect the connection.

3. When the pipeline is installed, oilseed hemp filler should be used for joint filling, and the joint filling method should be adopted for many times, instead of one-time filling.

4. During pipeline prefabrication, in order to ensure the pipeline is straight, the interface should be covered with wet straw bags for sanitary treatment. In addition, the pipeline should be placed horizontally in a safe place to avoid being trampled.

5. When installing pipes, use horizontal pipes and brackets. If the horizontal pipeline is long, a cleaning port should be set. Pay attention to the distance of the cleaning port in line with relevant standards and requirements. In general, the distance between the ground cleaning port and the wall should not be less than 200mm, and the distance between the horizontal cleaning port and the wall should not be less than 400 mm.

6. When installing the riser, it is necessary to ensure the verticality of the pipeline and the spacing between the walls.

7. If the drain pipe needs to extend to the joint of sanitary ware, it needs to be blocked before installing sanitary ware to prevent someone from throwing debris into the drain pipe.

This paper introduces the knowledge of whether there is only one qualified sewage pipe in the bathroom and the matters needing attention in the installation of the sewage pipe in the bathroom.