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The main problem is that the main sewer pipe is not smooth, and it is good to open it.
When there is a large amount of water upstairs, such as a washing machine, because the main pipe on the first floor cannot be discharged in time, it will leak back water from the first floor.
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It doesn't matter, because the people upstairs need water to live, and it's your downstairs that the sewer is blocked.
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It's because the sewer pipe leading to the outside on the first floor of your house is blocked, just dredge it.
This is due to the main sewer pipe being blocked, or not being clear. >>>More
The washing machines have special sewer pipes, and they are pre-installed when decorating!
If his things are broken, of course, he repaired them himself, and he affected others and let others fix them, how can there be such a reason.
Get an identification card, and only when you have a card can you open the door.
The fourth floor has a hairy relationship with the first floor.