What is the total water flow during a test using two hydrants with given measurements?

To determine the total water flow during a test using two hydrants, it's essential to consider how water flow is measured and recorded. In hydrant flow tests, flow measurements typically involve assessing the static pressure and residual pressure from two separate hydrants. The difference in pressure readings allows for the calculation of flow based on established formulas or tables that correlate pressure loss to water flow rates in gallons per minute (gpm).

The figure of 1356 gpm is likely derived from applying these formulas to the specific measurements recorded at each hydrant. This choice results from combining the flow rates produced by the two hydrants under testing conditions, ensuring that the calculated total reflects the actual water flow capabilities of the system. This includes considering any friction losses in the lines connecting to the hydrants and can also depend on local water supply configurations and characteristics.

This water flow figure must match typical standards for firefighting systems, where accurate flow rates are critical for ensuring adequate water supply during emergencies. Thus, 1356 gpm represents a valid and precise assessment based on the measured pressures, confirming the effectiveness of hydrants in meeting fire flow requirements.