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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.
Dirty, the main function of the trap is to prevent odor and backflow, and it is directly connected to the sewer, where the water must be very dirty and there are many bacteria.
Do your own experiment.
S-bend. P-bend. Put the words down. There's water. >>>More
are all indoors, no need to deliberately prevent freezing, besides, downstairs health asked for bathing, open bath bombs, these are relatively high temperature on the top of the bathroom.
Slowly becoming less normal. You may be too fast, only one may have a crack, you confirm it and replace it, there is a saying that it can be used normally and it is recommended to replace it for about five years.
Open the water tank lid (ceramic lid fitted with the water button). >>>More