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If the toilet drain of the card is not installed with the water of this small guan, I think it will not be poured in under normal circumstances, which should be reassuring.
There are three design options:
1. The water trap is installed under the ceiling downstairs and belongs to the surface installation; >>>More
When the water is flushed out, the water pressure is generated, and in the process of draining, the balance of the trap needs to be reached, and when a certain amount of water accumulates on one side, it will be discharged.
The drain is equipped with a trap, and now the toilet has its own trap, which is also very good. . . >>>More
This situation is not necessary. If it does, it will affect the flushing effect of the toilet.
If it has been installed, it is not good to install it again, and if it is not installed, it can be installed, there are two kinds of ceramic and plastic.