## Water Supply

### GRAPHICAL ANALYSIS OF FLOW TEST RESULTS

**Example:**

Suppose a flow test yielded the following results:

- static pressure of 86 psi
- residual pressure of 42 psi
- pitot pressure of 28 psi

If the pitot reading was taken on a single stream from a 2 1/2-inch outlet with a coefficient of discharge of 0.8, the formula gives the following:

**Solution: **

- Q = (29.83) (Cd) (d)
^{2} (Sq. root of p)
- Q = (29.83) (0.8) (2.5)
^{2} Sq. root of 28
- Q = 789 gpm

INDEX Water Supply

FPT 102 - Fire Prevention and Inspection // Instructor: Kevin M. Kolb
Slide #15