Can the sewer pipe on the top floor of the bathroom be sawn?

No, that's for exhaust. After cutting off and blocking, the floor drain will smell bad, and the households downstairs will protest. The fermented gas from the septic tank will be discharged through the vent of the sewer pipe, and after being blocked, it will have to overflow from the floor drain of each house through the water seal. So it has to be kept open.

If it's good, can the developer still install it? More than 10 meters of pipes have to stretch out to the house to face the trouble. How much more labor.

Have you ever thought about it, it is a necessary exhaust pipe, otherwise the feces will be flushed to the drainage riser building and the toilet of other people's houses will smell bad, so that the housing management property will find that you must install it immediately, which is harmful to others and yourself.

This must not be sawn. This extension tube is mainly used for exhaust gas. Because, after living for a long time, biogas will be generated in the sewer pipe, if the nozzle is closed, the biogas can not be removed in time, and it is very dangerous to remain in the pipeline.

Or the biogas can flow into the house. People can be poisoned if they come into contact with it.

Absolutely not, that's the exhaust port, otherwise the property will get you in trouble!

meiren, if no one asks, can be changed to not very effective deflated.