When suppling to a truck using a 5 inch line, if the required pressure exceeds the hydrant’s psi, what should you do?

When supplying a truck using a 5-inch line and the required pressure exceeds the hydrant's available psi, finding an alternative hydrant with higher pressure is a strategic approach. Using a hydrant that can provide sufficient pressure is crucial for maintaining effective operations, especially in fire suppression scenarios where the required flow and pressure need to overcome the friction loss and reach the necessary levels for effective firefighting.

Opting for an alternative hydrant would ensure that the truck receives the necessary flow and pressure without compromising the system, which could happen if one tries to force a connection at a hydrant that can't provide adequate pressure. This decision mitigates risks associated with low water pressure, such as inadequate suppression efforts or potentially endangering firefighters and civilians.

In contrast, reducing flow to match the hydrant's psi would be less effective as it might not meet the operational needs. Increasing hydrant pressure through pumping is often not feasible unless the system supports it, and using multiple lines to reduce friction loss might not be effective if the hydrant cannot supply the needed pressure in the first place. Therefore, seeking out a higher-pressure hydrant is the most reliable choice to ensure successful operations.