-
Residual water is designed to prevent odor from returning to the toilet.
You pour water with a basin, the water is sucked down, of course, the water will not be left behind, the water tank flushes, when the water is sucked up, the upper tank will also flow a part of the water, which is used as a water seal to prevent odor return.
For more detailed information, you can learn about the siphon principle and toilet structure.
There is no problem - it is too much impact, there is little water left, not no water: when the tank water is flushed, the pressure is small, and there is a lot of residual water.
It is very likely that the toilet is broken. It is recommended to take it apart and take a look.
It should be blocked! Generally, when the water level of the toilet reaches a certain position, it will automatically go down.
The supermarket sells it, and it is placed in the toilet tank to remove the smell of blue blocks.
Next time, pay attention and see if there are any more.