What is the usual flow rate from a normal sprinkler head at 50 psi?

The typical flow rate from a normal sprinkler head at a pressure of 50 psi is approximately 40 gallons per minute (gpm). This flow rate reflects standard design parameters for sprinkler systems, where flow rates can vary based on various factors such as the type and size of the sprinkler head and the specific design characteristics of the suppression system.

At 50 psi, many common orifice sizes used for sprinkler heads will provide this flow rate, allowing for effective fire suppression in residential and commercial settings. Understanding these flow rates is vital for fire officers when devising tactics for firefighting operations, as they need to accurately gauge water supply capabilities and the effectiveness of sprinkler systems in controlling or extinguishing fires.

Other choices represent flow rates that are typically found at either higher or lower pressures or different sprinkler specifications, which do not align with the typical performance at the specified pressure of 50 psi. Recognizing this standard helps in planning and decision-making in emergency response situations.