What is the standard pressure reading for a functioning fire hydrant when discharging water?

The standard pressure reading for a functioning fire hydrant when discharging water is 20 psi. This pressure is considered optimal because it provides sufficient flow and pressure for effective firefighting while also ensuring that the system is operating safely. Fire hydrants are designed to deliver water at this standard pressure to maintain adequate water supply for extinguishing fires.

When hydrants operate at this pressure, it allows firefighters to use hoses of various diameters effectively, ensuring they have the necessary water flow to combat fires efficiently. Additionally, this standard helps to maintain a balance in the municipal water distribution system without causing leaks or damage to infrastructure.

Higher pressures might result in excessive wear on the hydrant and surrounding water mains, while lower pressures might not provide enough flow for firefighting capabilities. Thus, maintaining the 20 psi benchmark is crucial for both operational efficiency and safety.