Leakage is defined as the volume of water that must be added to maintain a specified test pressure within what range?

The definition of leakage in the context of water distribution systems is related to the amount of water that needs to be added to a pipeline to maintain a specified test pressure within a certain range. In this case, the correct answer indicates that leakage is determined by maintaining the pressure within a range of 5 psi.

This specification is important for ensuring that the water distribution system is functioning properly. A range of 5 psi is commonly used because it provides a practical balance. It is narrow enough to ensure that any significant drops in pressure are promptly addressed, which can indicate a leak or other issue in the system.

Using a wider range, such as 10 psi or more, could allow for undetected leaks to persist longer and could hinder the timely identification of issues that need repair. This is essential in maintaining water quality, pressure, and overall system efficiency. Hence, the 5 psi range is an industry standard that allows for effective monitoring and maintenance of water infrastructure.