Abstract:With the acceleration of urbanization and the increasing number of residential buildings, the importance of pipeline layout technology in water supply and drainage design is becoming increasingly prominent. Reasonable pipeline layout can not only ensure the efficient operation of the water supply and drainage system, but also improve the space utilization and living comfort of residential buildings. The article will start with an overview of residential building water supply and drainage design, deeply analyze the impact of different layout methods on the hydraulic characteristics and water quality stability of the system, and analyze the relevant technical requirements for riser setting, horizontal pipe laying, and pipeline space reservation, in order to further improve the performance and reliability of residential building water supply and drainage systems and meet the high-quality living needs of residents.