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Downpipe ventilation. If it is not ventilated for a long time, biogas will form inside. Then light a cigarette and you can make a dirt plane.
The ground floor of a pipe building is blocked, and the upstairs needs to share the burden. >>>More
Sewer odor. Find a professional to deal with it, or go to the building materials market to buy a floor drain that is specially designed to prevent odor and press it.
There are three reasons why this should happen:
1. Leakage at the junction between the pipe and the floor slab. >>>More
20 years of commercial housing bathroom on the sixth floor of the gastroscopy room, there are two bathrooms on it, can you bear the load? It should be possible.
The cross-sectional area of 50 pipes is a quarter of that of 110 pipes, so change it to such a small one, strictly speaking, it depends on the pressure and characteristic curve of your exhaust fan to know whether it can be or not. >>>More