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The 5th floor gamble is, of course, the 5th floor discovery.
The toilet on the 5th floor is blocked by your own problem. >>>More
Obviously, the downstairs restaurant has changed the plumbing or sewage needs at will, and does not want everyone to know the internal details. >>>More
There should be a blockage in the upper vents, which is why the water flow is slow
The toilets on the 2nd floor are all living there, sometimes there will definitely be an impact on the blockage of the upstairs, the toilet leads to the outdoor pipe with a vertical pipe and a horizontal pipe, the most important thing is the blockage of the horizontal pipe, resulting in the water not flowing, so that the upstairs toilet can not be flushed.
What you can't do is hypocrisy, and there's nothing you can do.