随着城市建设的不断发展,城市用地越来越紧张,高层建筑、次高层建筑会越来越多。相比之下,次高层建筑(特别是住宅)施工周期短,容积率高,产生效益快,更得到广大房地产商的青睐。而且,由于次高层的物业管理费与高层建筑的物业管理费相比要低得多,所以,大多数购房者倾向于购置次高层建筑。而这类建筑的供水就涉及到增压供水的问题。大楼 With the continuous development of urban construction, urban land use is getting more and more tense, high-rise buildings and sub-tall buildings will be more and more. In contrast, the second high-rise buildings (especially residential) construction period is short, high volume ratio, resulting in quick benefits, but also by the majority of real estate business of all ages. Moreover, since sub-high-rise property management fees are much lower than property management fees for high-rise buildings, most homebuyers tend to purchase sub-high-rise buildings. The water supply for such buildings involves the issue of pressurized water supply. Building