What is the difference between the seventh floor and the ninth floor of the high-rise water supply system?

Generally speaking, there is no difference between the seventh and ninth floors of high-rise water supply. The water pressure is different at most. The water pressure on the seventh floor is definitely higher than that on the ninth floor.

However, there is a difference between six floors and above. At present, there are more than seven floors (including seven floors), and the pressure of urban water supply network is insufficient, so secondary water supply equipment is needed for water supply. There are indeed two water supply pipes, the municipal water supply is below the sixth floor, and the first floor is upward water supply. Above the 7th floor is the property water supply, which is supplied from the top floor. These two pipes are strictly forbidden to communicate. On the highest floor, there will even be three water supply pipes.

When the demand for water pressure and quantity of domestic drinking water in civil and industrial buildings exceeds the capacity of municipal public water supply or self-built water supply network, it will be supplied to users or for personal use through storage, pressurization and other facilities. Secondary water supply is the only choice for high-rise water supply. Simply put, the water pressure delivered by the waterworks is not enough, and the residential areas store water through water tanks, which are pressurized and delivered to high-level users.