The size of sewage pipes for different purposes is also different:
The diameter of the drainage branch pipe connected to the wash basin, washbasin, bathtub and sanitary basin is dn32 (the diameter of the sewer pipe is 32mm), and the larger one can use dn40 (the diameter of the sewer pipe is 40mm).
The diameter of the drainage branch pipe connected to the urinal and urinal is dn50 (the diameter of the sewer pipe is 50mm) and dn75 (the diameter of the sewer pipe is 75mm).
The diameter of the drain pipe connected to the toilet is dn110 (the diameter of the sewer pipe is 110 mm).
What is the size of the toilet drain?
There are many options for the size of the toilet drain pipe, generally 300, 350, 400 and 450 mm. According to the specification of the toilet drain pipe, there are 75 or 90, which refers to the nominal outer diameter, and the corresponding drain pipe will also be different.
According to the national standard, the distance between the drainage pipe and the center point, that is, the distance from the wall, is about 300 mm, which is a relatively normal size. Of course, if there are differences, it is normal, basically between 300 and 400.
If the diameter of the drainage pipe is 110 mm, it is generally 300 or 400 mm from the wall, so 300 mm or 350 mm can be selected to ensure the installation in place later.
Left and right dimensions of toilet water supply
The toilet inlet pipe joint is on the left side, with a distance of 15cm from the toilet water tank and a vertical height of 40cm from the bottom of the wall. It is positioned as the toilet inlet pipe.
At least 15cm shall be reserved on the left and right sides of the toilet. If there is a smart toilet cover, the reserved size on the right side shall be at least 35cm; If there is a handrail, the size to be reserved at the handrail side shall be at least 35cm; If there is a shelf or carton, the reserved size at the shelf side shall be at least 30cm. Fifteen centimeters on both sides of the toilet is also enough. The specific area should be determined according to the specific area of the toilet. If the toilet area is relatively large, it can be left at 20~30 centimeters.
If the area left on both sides of the toilet is relatively small, it will be troublesome to replace parts later. If the space is enough, try to leave more space. The area on the right side of the toilet should be larger to facilitate the removal and replacement of water pipes.