Calculating the roughness factor in a water pipe provides an indication of the condition of that main. Used for identifying operational efficiency and for input in distribution models, it is important to accurately develop this parameter. The work requires an accurate recording of flow, pressure, lengths and, in some cases, elevation. Using either a parallel hose method or a method developed by Hydromax personnel for long lengths of pipe, the work requires careful planning to maximize the effectiveness of the test and to accurately understand the results of the testing.
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