Why can air become a problem in a water main?

Air can become a significant problem in a water main primarily because it can collect and create air pockets, which may disrupt the flow of water. When air accumulates in a water main, it can hinder the movement of water by creating a blockage or reducing the effective flow area. This situation can lead to inadequate water supply to consumers, decreased pressure in the system, or even complete stoppage of flow in severe cases.

Maintaining a consistent flow of water is crucial for ensuring adequate supply and pressure throughout the distribution system. Therefore, managing air in water mains is essential for the efficient operation of water distribution networks, which is why this aspect is particularly important in water system maintenance and operation. Understanding how air impacts flow helps in designing systems that minimize air entrapment and ensures smooth water delivery.