What is the minimum pressure typically required in a water distribution system to ensure adequate flow?

In a water distribution system, the minimum pressure required to ensure adequate flow is generally considered to be around 20 psi. This level of pressure is necessary to support various functions, such as providing sufficient hydraulic head for water to reach taps and fixtures within buildings, as well as ensuring that firefighting systems can operate effectively.

When pressure is maintained at this minimum level, it ensures that water can be adequately dispensed to consumers while minimizing the risk of stagnant water and the potential for contamination. Additionally, a pressure of 20 psi helps to maintain enough velocity to keep water moving through the system, which is critical for preventing sediment buildup and ensuring the quality of the water delivered.

While higher pressures can be beneficial in some cases, particularly for taller buildings or areas with significant elevation changes, the standard minimum of 20 psi provides a balance between functionality and safety in most standard applications within a water distribution system.