What proportion of water and air should be in water tanks?

The correct response regarding the ideal proportion of water and air in water tanks, especially in the context of fire protection systems, is that it should typically consist of 2/3 water and 1/3 pressurized air. This balance is essential for maintaining adequate water pressure and ensuring that when water is needed, it can be expelled quickly and efficiently.

When the tank is filled with this ratio, the pressurized air acts as a driving force, helping to propel the water out of the tank at the desired pressure and velocity when needed, such as during a fire incident. This setup enhances the effectiveness of the water supply during firefighting operations. Additionally, having this specific proportion helps prevent issues like air pockets or inconsistent pressure, which can occur if the tank's air or water levels are not correctly adjusted.