In engineering:
1. Bury pipes in a straight line at the entrance and exit, with the shortest straight line between two points, which can save the workload to the greatest extent;
2. Buried mouth is higher than the exit, the lowest is 13 degrees, and the general angle is 18 to 25 degrees, which is convenient for running water, gambling and siltation;
3. The diameter of buried pipe is the largest, and the diameter of drainage branch pipe connecting urinal and urinal is dn50 (sewer pipe size is 50 mm) and dn75 (sewer pipe size is 75 mm). The diameter of drainage branch pipe connected with washbasin, washbasin, bathtub and sanitary basin is dn32 (sewer pipe diameter is 32mm), and dn40 (sewer pipe diameter is 40mm) can be used for larger ones.
4. It is best to be waterproof after burying the pipe to avoid moisture regain. It is best to stick tiles or stones on the ground to prevent water vapor from rising.
Feng Shui: If you build a house by yourself, you'd better consider the position of the water outlet of the water pipe (that is, the kitchen water pipe and the bathroom water pipe), which is very important in Feng Shui and related to people's health and wealth. Some directions are suitable for water and some are not.
1, the sewage pipe must not pass through the living room, and it is forbidden to pass through the room. It is unwise to leave the room. It's even more fierce to enter the door. There is water under the room. This is not water coming into the house. However, to get rid of it, it is difficult to stay by water, which means losing at home.
2. If it is your own tap water pipe, you can pass through the underground living room. Being regarded as your own wealth water, the direction of entering and leaving the water should be left in and right out.