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Anonymous users2024-01-241. All the toilets on the first floor are directly connected to the sewers, and the buried pipes lead directly to the underground sewer, and of course the sound is loud when the water flow is relatively rapid.
It's mold at work.
An incomplete fungus that mainly corrodes industrial materials and cement, and is better to grow on porous surfaces and feed on the minerals in cement. >>>More
There are two reasons, the first is that there is no diversion of rainwater and sewage, that is, rainwater and sewage use the same underground pipe. The second is that the diameter of the sewage pipe is not large enough, and the large amount of water cannot be drained smoothly, which will cause backflow and flooding. >>>More
Brand toilets are better, such as Wrigley, TOTO, Yigao, etc., pay attention to the selection of special products, so that it is a good price.
According to my analysis, the main reason for this is that when you are building outdoor pipes, it is likely that rainwater and sewage pipes are mixed, or rainwater pipes are also put into the septic tank, so that when it rains, these phenomena will appear; There may also be no septic tank, and rainwater and sewage pipes are mixed, and the diameter of the pipe is not enough (or the garbage accumulated in the pipe causes the pipe to shrink), and the phenomenon you mentioned will also occur when it rains.
It's good to be closed, anti-theft and dust-proof.
There are no regulations. >>>More