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Find a professional bricklayer master, just a day or two.
For floor drains, you can learn about the very core floor drains with anti-gravity design.
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Usually two to three days is enough! It won't take long!
Isn't this obvious backwater, your sewer is blocked. Otherwise, the entire corridor was blocked with water.
Your floor drain is connected to the drain pipe of your toilet and the drain of the wash basin. As long as the main sewage pipe is blocked or not smooth (it is estimated that it is not smooth), according to the principle of water flowing to the lower place, the sewage in the three drainage pipes will return from the lowest pipe. And your floor drain outlet is lower than the other two pipe outlets, and the sewage overflows the ground. >>>More
You can temporarily block it and take it off after repairing!
Unclog the sewer pipes.
Wash basin deodorizer can be purchased with a very core floor drain that is anti-gravity. >>>More
Find a worker to open the floor tiles near the toilet, and then put down a pipe under the toilet, the slope is better to be larger, otherwise the water will not be smooth when using some foam. It doesn't matter if it's a man, men use more water and less foam of all kinds hahaha. Then re-apply the cement and add some glue, which can also play a waterproof function.