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Generally, the pipes are laid separately, the toilet sewer pipe is generally very thick, and the daily water sewer pipe is relatively thin. Finally, the daily water is connected to the main sewer.
It is a sewer, but it is blocked by a trap to prevent sewage from backflowing and anti-odor
Not necessarily, it needs to look at the installation situation during planning, design and construction.
Foreign objects in the toilet bowl or sewer trap cause poor drainage. >>>More
It is a sewer and is all domestic sewage. The sewer pipe is not all the way
It cannot be changed, one of the two calibers is not the same, it is necessary to change small to large, it is easy to block, even if the two calibers are the same, the reservoir is not the same, which is not conducive to urban sewage discharge.