A main break may cause low pressure in the distribution system which can result in what?

A main break in a water distribution system creates an area of low pressure, which can lead to the phenomenon known as backsiphonage. Backsiphonage occurs when there is a reduction in pressure that allows contaminants from nearby sources, such as soil or other connected piping systems, to be drawn into the main water supply through any available openings, such as leaks or unprotected cross-connections. This is particularly a concern in drinking water systems, as it poses risks to public health and water quality.

Maintaining adequate pressure in the distribution system is crucial for preventing such contamination events. When pressure is stable and within the normal operating range, it helps ensure that water flows correctly and that contaminants cannot easily enter the system. Therefore, understanding the implications of a main break and the associated risks, such as backsiphonage, is vital for water operators to effectively manage and maintain a safe drinking water supply.