Size of reserved drain pipe in toilet

The size of the drain pipe is reserved for the toilet. According to national standards, the distance from the drainage pipe to the center point, that is, the distance from the wall, is about 300 mm

There are many choices for the size of the toilet drain pipe, generally 300, 350, 400, 450 mm, and 75 or 90 according to the specifications of the toilet drain pipe, which refers to the nominal outer diameter, and the corresponding drain pipe will be different.

If the diameter of the drain pipe is 1 10 mm, which is generally 300 or 400 mm away from the wall, you can choose 300 mm or 350 mm to ensure the later installation.

The reason why the toilet won't fit:

1, the size of toilet and sewage pipe does not correspond. It may be caused by the incorrect choice of drainage pipe. If there is a difference, the gap should not be too big.

2. Considering that the pipeline is embedded, it may be necessary to consider the thickness of the wall brick. Whether the outlet size of the toilet is 35 or 40 depends on whether the toilet drains downward or backward. If it is drainage, it is about 36 mm from the wall to the pipeline, and the drainage can be directly connected to the wall and then connected to the sewer.

3. The selected drainage pipeline should also be within a reasonable range, otherwise it may not be installed. If the sewer pipe is improperly installed, it may also lead to the problem of later blockage, which will affect the use of the whole bathroom.