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Your plan doesn't work, the drain and exhaust can't be combined, and the sewer pipe can't drain the air, so you have to find another way to solve the problem of exhaust!!
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It causes an unpleasant smell and can't be solved. I can't adopt it.
The wall is eye-catching, and the independent exhaust pipe is not finished.
The appearance of the living room led light is 110cm wattage, which is generally 120 watts, and the 110cm 80 led light.
The straight pipe is the main drainage, and the half is the drainage from your upper floor. When decorating, you can use soundproof materials to wrap the pipes first, use bricks or keels to make columns, and then use tiles to wrap them.
If you want to add a new drain, there's a way to not truncate the main: >>>More
There is this special joint on the net, and the cast iron is 100???
It's okay to put it down, it doesn't matter if it's bigger or smaller, it's all made up anyway.