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Yes, especially the toilet cleaning block or something! The backwater downstairs is blue! I've been there!
The reverse flow may be that the plane slope is not done well, which is very hidden and also causes a lot of inconvenience to life in the later stage, so it is recommended to do it again.
Yes, but the property owner will push the problem to your home for various reasons!
Under normal circumstances, the water in the toilet tank does not flow back. Because the pressure rod in the tank will automatically crush the valve when the water is full, preventing backflow. >>>More
Find the property management and the upstairs house to fix it.
First of all, find the leak immediately and cut off the water source. Then immediately clean up the stagnant water and notify the residents downstairs. If there is any property damage, the full amount will be paid. >>>More