What is the formula for calculating the maximum pressure for SNAP-TITE TPX 5" hose?

The maximum pressure for SNAP-TITE TPX 5" hose is determined by a specific guideline that generally allows for a safe operational margin above the normal highest operating pressure. The correct answer is based on the understanding that it is standard practice in fire service to ensure that the equipment can handle pressures above what is typically experienced in normal operations.

By choosing an option that indicates a maximum pressure set at 10% greater than the normal highest operating pressure, it reflects a balance between safety and performance. This approach allows for operational flexibility and compensates for potential fluctuations in pressure during firefighting efforts.

In contrast, other options either suggest an insufficient margin of safety or an unnecessary increase in pressure that could lead to risks of hose failure. Adhering to the 10% increase provides a practical guideline for fire departments to ensure that their equipment remains effective and safe while minimizing the chances of hose failure during operations.