What is the recommended minimum pressure for water coming from a fire hydrant?

The recommended minimum pressure for water coming from a fire hydrant is set at 20 PSI. This pressure is considered essential for effective firefighting operations. At this level, it ensures that there is enough flow and pressure to support firefighting activities, enabling firefighters to adequately deliver water to the scene of a fire.

A pressure of 20 PSI allows for the necessary water supply to be maintained, providing firefighters with sufficient hydraulic conditions to operate hoses, control nozzles, and manage fire streams. Adequate hydrant pressure is critical in ensuring that fire apparatus can connect and extract water quickly during emergencies, thereby facilitating a rapid response to extinguish fires effectively.

Lower pressures, such as those indicated by the other options, would not provide the reliable flow needed for firefighting. Insufficient pressure can result in inadequate water supply, making it challenging to combat larger fires or to protect life and property effectively.