Ground level within the area allows practitioners to understand why pressure is varying across an area.
The green target pressure line shows the minimum pressure needed across the area, based on customer elevations and levels of service.
A PRV installed on the area inlet drops the pressure by a consistent amount.
This total head gradient shows how much pressure is available throughout the area at peak flow prior to the installation of the PRV, showing the opportunity for reduction.
The updated total head gradient shows the overall reduction in pressure which can be achieved by dropping the pressure until it reaches the green target pressure line.
Large users can have additional pressure or flow requirements, which should be considered at the design stage to ensure any service level requirements are met.
Tall buildings can present a challenge for supply and may need additional pressure to meet service level requirements to feed roof tanks.
In most cases, sufficient pressure reaching household properties forms the core design criteria for pressure management schemes.
Considering any exports to cascading areas ensures that downstream areas receive the pressure that they need.
