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If you don't dismantle the hanging plate downstairs, you can generally solve the problem The most worrying thing is that there are big hard things that can't be flushed out and can't be taken out of the toilet connection If it's a general blockage, it can be solved.
You find the owner of the 12th floor to try it according to my method: >>>More
There is no obligation.
This is the property and the water repairer to tidy up. >>>More
There is a lot of water in the toilet bowl because the toilet bowl is automatically reloaded. If the upstairs toilet is leaking, you should of course find the other party and ask the resident to find the property for repairs.
You can find a property or neighborhood committee.
Of course, it is generally reasonable to communicate with the upstairs first. >>>More
The outlet of the toilet bowl has a U-shaped bend, also known as the return bend, which plays the role of "water seal" to prevent the gutter from returning to the smell. >>>More