The graph below has been generated from calculations assuming the pipe is in good condition and in a straight line.
As shown in the chart, there is a relationship between water pressure (the force at which water is pushed through a pipe), and the flow rate (the volume of water running through the pipe).
It is important that we have a basic understanding of flow as we can use this when calculating what thresholds to set in our flow based leak detectors. There are two main settings that are affected by flow; the volume and the time parameters. It is important that we try to set them with some accuracy as this will affect how much water will escape should there be a leak.