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It's darkened, because the glass glue is moldy, so it's blackened. How to deal with it: When installing the toilet, it is best to use anti-mildew glass glue or sewing agent, which will not be the case.
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There will be no air leakage, and there will be water leakage if there is a hole.
1. The sewage pit pipeline is 10cm above the ground, and if there is no 10cm height reserved, it is easy to cause problems such as failure to align the sewage outlet and water leakage. >>>More
Then your toilet flushing method should be siphon type, this flushing method generates a huge suction through the S-shaped pipe to take away the sewage, and if the air leaks, the pressure will be smaller, and it will not produce such a large suction, just like a blockage. Then you just need to change the seal!
Toilet deodorant:
1. Match burning method. >>>More
It's all pretty much the same.
Generally, glass glue and white cement are used. >>>More
If the sealant under the toilet bowl is not done properly, it will not affect the toilet drainage, but there may be odors coming out, so you should install it carefully.