How much higher should pressure testing be compared to normal operating pressure?

The correct approach to pressure testing a water distribution system typically involves raising the test pressure to a level that adequately assesses the system's integrity and ability to withstand operational stresses. Increasing the pressure by 50% above the normal operating pressure allows for a thorough examination of the system's components, such as pipes, joints, and fittings, ensuring they can handle potential fluctuations and pressures encountered during normal operation.

This testing standard is established to ensure safety and reliability. It produces results that help identify weaknesses or leaks that could compromise the system's performance during regular use. By testing at this elevated level, utility operators are able to confirm that the infrastructure is sound and can effectively manage the pressures expected in real-world conditions.

Testing at pressures significantly higher or lower than this standard may not provide a true reflection of how the system will perform under stress, potentially leading to oversight of critical issues. Thus, using a 50% increase aligns with established safety protocols and engineering best practices in water distribution systems.