What is the total loss of pressure through valves and clappers in a sprinkler system?

In a sprinkler system, the loss of pressure through valves and clappers is a critical factor in ensuring that the system operates effectively. The total loss of pressure can significantly impact the water delivery to the sprinkler heads, thus influencing their performance in extinguishing fires. The figure of 25 lbs represents a common industry standard for the total pressure loss through these components, which takes into account various factors like flow rates, the design of the system, and the materials used.

A loss of 15 lbs might underestimate the impact of these components under certain conditions, while 35 lbs and 45 lbs could overstate the pressure loss experienced in a typical system scenario. Understanding the nuances of pressure loss helps fire department personnel make informed decisions in both design and operational contexts, ensuring that the sprinkler system meets the necessary performance standards for fire suppression.