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

The recommended minimum pressure for water coming from a fire hydrant is essential for ensuring an effective water supply during firefighting operations. A pressure of 20 psi is recognized as sufficient to ensure that firefighters can adequately operate hoses and equipment, allowing for effective firefighting and tactical maneuvers.

This lower pressure is particularly relevant in situations where the water needs to be transported over distances and through hose lines while still providing enough flow to reach the fire. Notably, many firefighting scenarios or appliance requirements specify higher pressures for optimal performance, which makes the minimum established pressure significant for basic operational needs.

In comparison, options suggesting higher pressures, such as 50 psi, 80 psi, or 115 psi, can be too high for certain operational policies or equipment requirements. While these pressures may be optimal for specific scenarios, they are above the minimum necessary to ensure that an adequate supply is available for basic firefighting efforts. Thus, the standard set at 20 psi reflects a balance between minimum needs and operational effectiveness in typical firefighting situations.