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It should be an old community, the toilet sewers are now PVC, for many years, the iron seems to be only welded, but the sewer corrosion of the toilet is relatively large compared to the sewer pipes in other places, so it should be replaced as soon as possible to avoid frequent dripping in the future.
Use the plugging king for a small area, and ask the master to take a look at the big one.
If it is not the leakage caused by the alteration of the pipes upstairs, the property should be responsible for repairs. If it is caused by his own reasons upstairs, then he is obliged to solve it, or it is up to you to fix it, and then ask him to compensate for the damage. >>>More
That's a matter for the developer, builder, or property.
Dig the best permeable waterproofing can be done by yourself. >>>More
Whose responsibility depends on the cause of the water leakage, if it is caused by man-made or decoration upstairs, it must be the responsibility of the upstairs, if it is the damage caused by the normal use of the water pipe, there should be the responsibility of the property, now the first thing to do is to find the leakage point, restore the wall as soon as possible, and then negotiate with the upstairs on the issue of responsibility.