Water supply and drainage are mainly divided into three major contents: one is water supply engineering, the second is drainage engineering, and the third is building water supply and drainage.

Water supply engineering mainly refers to some matters related to the water company, such as the design and construction of the water plant, water supply pipelines, pump rooms, filters and sedimentation tanks, etc., and the work engaged in is also related to the water company.

Drainage engineering is divided into two aspects, one is municipal drainage that is related to urban drainage pipelines, the other is water treatment, the current development trend is relatively good, mainly sewage treatment plants and reuse water treatment, etc., in the case of water resources in the north of the situation of development space is very large.

Building water supply and drainage are mainly the water supply and drainage and fire pipes in the building.

Water supply and drainage engineering is one of the five major divisions of mechanical and electrical installation, and it is also an important content throughout the whole process of construction engineering.

Water supply and drainage construction mainly includes： (1) pipeline installation, (2) pipeline plugging, (3) pump installation, (4) fire protection component installation, (5) roof pipeline installation, (6) experiment, (7) finished product protection, (8) end installation.