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You can ask the developer or the property for this, which should generally be a centralized smoke exhaust or exhaust pipe. Generally, there should be a mouth, if not, it may be that you forgot to open it, or if it was opened, you didn't pay attention to the board in the middle.
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Next door is not the kitchen, if it is the kitchen flue!
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Is there a mouth? Is it an exhaust outlet to the roof?
The main bathroom pipe was installed when the developer repaired the house, and this should go to the property. Let them repair.
There's no problem with that.
Because most of the pipes in the construction process are tube wells. >>>More
If it can be replaced, it is best to replace it again, because the water leaks, it will be more troublesome in the future, or see if you can use professional glue to fix it, it is best to ask a professional to guide and repair it for reference.
Most of them are separated, but some bathrooms and kitchens are so close that it is only possible to use one if they are in close proximity.
The sewage pipe and the water pipe are next to each other, and the tap water will not be polluted in general. The tap water pipe is pressurized, and the drain pipe is self-flowing by gravity without pressure, and generally even if there is leakage, it will not enter the tap water pipe.