The following units are millimeters (mm)
1, drainage riser diameter >; =75
2. The drainage branch pipe is connected with washbasin, kitchen sink, toilet sewer, etc. The sewer pipe with a diameter of 32 mm and a diameter of 40 can be used for larger specifications.
3. The diameter of drainage branch pipe connecting urinal is 50, and the diameter of sewer pipe is 75.
4. The diameter of the drain pipe connecting the toilet is 1 10.
From the water supply point
Generally, the pipeline from water source or water treatment plant to pipe network does not directly supply water to users, but plays the role of water delivery, which is called water delivery pipeline. The pipes that deliver and distribute water at the same time in the pipe network are called main pipes. The diameter of the water supply pipe from the main pipe to the user is 100 or 150 mm, which plays the role of water distribution and is called branch pipe. Connect the branch pipe of the user from the supervisor or branch pipe, and leave a water meter on the pipe to record the water consumption of the user. Fire hydrants are usually connected to branch pipes.