A kind of interlayer drainage, the top of the bathroom is the drain pipe of the upstairs home.

There are two kinds of drainage on the same floor: the bathroom floor sinks, and the pipes are all inside, so you have to fill them up yourself. This drainage is called caisson. Either the drain pipe is directly on the ground, and the whole bathroom is higher than other places, which is very inconvenient to use.

Drainage on the same floor, but the drainage pipe is on the ground, so the bathroom must be raised. No matter what kind of drainage structure, if you want to expand the space of the bathroom, you need to add pipes. The floor can't be smashed casually, and the drain pipe will either reach the ground or the top.

Extended data:

Matters needing attention

1. The installation requirements of the upper pipe and the lower pipe cannot be laid in the same pipe, and the water flow pressure is different, so as to prevent the broken pipe from polluting the water source, and the later maintenance is also very inconvenient.

2. Pay attention to the direction of water flow when installing water pipes in the bathroom, generally along the top to avoid being damaged during construction, and try to ensure that the pipes do not cross, especially the hot and cold water pipes should be separated by a little distance. Try to avoid corner bends, and use special corner fittings when necessary to facilitate pipeline blockage and maintenance in the later period.