"The most acceptable method of applying Pressure Management in Pressure Zones is regulating the zone pressure in accordance with the demand or flow in the zone.
This method of Dynamic Pressure Management is based on the assumption that during most of the time there is access pressure in the system which can be reduced to the minimum pressure still ensuring sufficient pressure for the most inferior client in the zone. By this we may reduce the NRW due to leaks and bursts to an acceptable minimum while insuring that in cases of high demand, the pressure in the system will raise to ensure sufficient needed pressure in the zone (during day time or – for example –during fire emergency demand at night). This Dynamic Pressure Management is achieved mainly by using Pressure Reducing Valves controlled by deferent controllers, electronically, electrically or mechanically operated."