Is the high-rise residential building in Jindi Zicheng, Banqiao New Town, Nanjing a secondary water supply? '

Baidu map shows that Zicheng is a high-rise residential area and needs to use secondary water supply equipment.

First of all, we must understand what secondary water supply is. Primary water supply means that the source water is purified by the waterworks and then transported to the underground of each street and community through the municipal tap water pipeline. This is a process of water supply. The water in the water pipe network is under pressure when it comes out of the water plant. The general municipal pressure is between 2 and 4 kilograms (that is, 0.2 to 0.4 MPa, that is, the pressure of 20 to 40 meters of water column). Considering the pipeline pressure loss, this water pressure can generally meet the needs of multi-layer water supply, that is, this pressure can reach six or even seven layers. These communities do not need secondary water supply equipment. However, if there is a small high-rise building or high-rise residential area, such as 18, and the water pressure reaches 6, it will not be able to get up. Then a secondary water supply system is needed to pressurize the water to the required pressure on the roof through the lifting of the water pump. Secondary water supply is a place where municipal pressure cannot supply, and water needs to be supplied through secondary water supply equipment. The secondary water supply equipment is generally located in the basement pump room of the residential area, and the residential property knows the specific location.