The drain pipe in the bathroom on our floor was naturally broken, and the responsibility belongs to

The drainage pipes in the building are indispensable, and some vertical pipes pass through the residents' houses, and the same is true for the top floor, because the pipes that drain down must be ventilated up and down, otherwise the water will not flow because of atmospheric pressure, so the drainage pipes must be ventilated to the roof. Two 10 cm drains in your bathroom may not be well designed, but the drains can be designed inside the wall. I've also seen large water pipes pass through the residents' bathrooms, but they are hidden by a raised rectangular wall, at least not as ugly as the two bare thick pipes, and the area occupied by this 'rectangle' should be deducted from the area of your house, that is to say, you don't pay for the house in this area, haha·· However, this is a matter of consultation with the seller. >>>More

This diameter is generally the kind of thick pipe, and there are no specific requirements, because it is better to drain sewage on different floors now.

Which is the best drain pipe in the bathroom? It is relatively better to use Jinde, Rifeng, and Jinniujiao drainage pipes :: >>>More

It doesn't matter if it's a decoration.

It is called a fire stop ring, also called a fire arresting ring, which is used on the high-rise floor, mainly to prevent fire from occurring.