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Normal. The new toilet is a water-saving toilet, and some of the water outlets are so small that they can't even pass through dry and coarse stool, and this structure produces a sound of siphoning.
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Because there is a siphon effect, just like the ebb tide of the sea. There is also a sound.
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Maybe the water is too strong.
Before and after flushing, check whether there is water on the surface and whether it is increasing, and then you will know whether there is a water leak.
The toilet flushes loudly and loudly, and most of them are caused by it.
Sewers are a type of urban public facility that has been used as early as the ancient Roman period. The prototype of modern sewers originated in Paris, France, and Paris still has the largest urban sewer system in the world. Generally speaking, the sewer system is used to collect and discharge domestic wastewater generated by the city and industrial wastewater generated on the industrial sewer product. >>>More
It's psychosis. Then you should be too timid to go with the lights on.