Which of the following is unsafe if water mains exceed this specified pressure?

In many utility systems, water mains are designed to operate efficiently within a certain pressure range. When the pressure exceeds 100 psi, it can lead to several safety hazards. This elevated pressure can cause structural stress on the pipes, increasing the risk of leaks or ruptures. Additionally, excessively high pressure can strain connections, fixtures, and valves, leading to potential failures in the system.

Maintaining a safe pressure level is critical for the integrity of the water distribution system, ensuring it can deliver water effectively without causing damage or posing safety risks to infrastructure or public health. Lower pressure levels like 20 psi, 25 psi, and 35 psi are typically within safe operating parameters for many systems, while anything over 100 psi is generally established as a risk threshold. Thus, understanding these standards is vital for maintaining the safety and reliability of water infrastructure.