1, turn up the toilet and block it, and pick up an independent one yourself. It's easy for you to live on the second floor, but you need it on the third floor.
2. See what is more convenient, either turn the toilet upside down or install an overflow pipe with a diameter of 1 10 at the bottom of the toilet on your next floor. The kitchen can also do this, but only if the drain is not too far away from the supervisor, because the kitchen is blocked with oil.
Advantages of the second method: it doesn't harm other innocent residents (a mouse excrement,,,,,). When the pipe is blocked, the water overflowing from the pipe will not hurt the family first. Should the other one know how to solve it?
I am original, hoping to help more users on the first and second floors, and I also hope that more experts will come up with better and more practical methods.