Building water supply system mainly includes domestic water supply system,
production water supply system and water fire fighting system. Building drainage
system includes domestic drainage system, industrial wastewater drainage system
and roof rainwater drainage system. Nowadays, the corresponding water supply and
drainage system has been set up in buildings, which has brought great convenience to
people’s living needs. However, with the continuous expansion of urban construction
scale, water resources are increasingly scarce, people have new requirements for the
design of building water supply and drainage system. Advanced design concept of
water supply and drainage can improve the utilization efficiency of water resources,
which is more in line with the sustainable development of the city. In this paper, the
application of water-saving concept in building water supply and drainage design is
analyzed as follows.