1.2 Introduce the properties of pipes
It is necessary to define the length and diameter for pipes as well as a coefficient to estimate the headloss occurring when the water is flowing through. The network model we are creating is going to use the Hazen-Williams equation to estimate the headloss. Independently of the headloss equation used, pipe lengths and diameters are two properties that are available in practically every hydraulic network model. The following table summarizes the property values to be utilized for each pipe including Hazen-William coefficient (H-W).
| Pipe ID | Length(m) | Diameter (m) | H-W Coefficient |
| Pipe 01 | 4828 | 356 | 75 |
| Pipe 02 | 1609 | 350 | 130 |
| Pipe 03 | 1609 | 254 | 80 |
| Pipe 04 | 6437 | 350 | 125 |
| Pipe 05 | 1609 | 350 | 125 |
| Pipe 06 | 1609 | 254 | 120 |
| Pipe 07 | 1609 | 203 | 100 |
| Pipe 08 | 1609 | 175 | 120 |
| Pipe 09 | 1609 | 254 | 130 |
| Pipe 10 | 1609 | 102 | 100 |
| Pipe 11 | 1609 | 254 | 120 |
| Pipe 12 | 1609 | 175 | 135 |
| Pipe 13 | 1609 | 175 | 120 |
| Pipe 14 | 1609 | 350 | 120 |
| Pipe 15 | 1000 | 350 | 100 |
In EPANET, pipe properties of a hydraulic model (length, diameter, roughness, etc.) can be set from a property grid. You may open the property grid by double-clicking on any desired pipe in the drawing space and view the current properties of the selected pipe. Alternatively, you might select the desired pipe ID from the data browser window to view its properties. Choose “Pipes” then a pipe ID from the Data browser window to open the “Pipe Property” editor (see figure below).
For the purpose of this workshop all parameters, for each pipe, need to be inserted manually. Meaning, enter their property values(see Table 1.2.1: Pipe parameters in this chapter) one by one using the property grid as previously described.
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