GRAPHICAL ANALYSIS OF FLOW TEST RESULTS
Graphical analysis involves using special hydraulic graph paper. This is a special semilogarithmic paper which allows the test results to be plotted as a straight line. The test results are plotted as follows:
- First, the static pressure is plotted above 0 gpm, since no test water was flowing when the static pressure was measured.
- Next, plot the residual pressure directly above the flow that was measured during the test. When these two points are connected by a straight line, that line represents the water supply available at the test hydrant.
Any questions regarding pressure and flow at the test hydrant can then be answered.
FPT 102 - Fire Prevention and Inspection // Instructor: Kevin M. Kolb