1 answers
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Hello dear, it's better to put a waterproof sleeve. Hope mine can help you, hope!
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Two roots, each household shall be separated.
Is it necessary to install a water-stop ring at the place where the toilet drainage riser passes thr
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There is no clear provision in the construction quality acceptance specification for building water supply and drainage and heating engineering to install a water-stopping ring, so the water-stopping ring can not be installed when the design is not clearly specified in the construction.
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Not more than 3 meters, generally one layer.
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If it does not affect, do a good job of the drainage pipe of the kitchen sink S bend is not blocked, and the S bend is fine if the water is stored normally, and it is anti-odor.
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There are no clear requirements, just leave the manholes well.