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

In a sprinkler system, the total loss of pressure through valves and clappers is typically quantified to ensure effective water delivery and system performance. A loss of 25 psi is considered a reasonable estimate for the pressure drop experienced when water flows through these components. This figure takes into account the various resistance factors that valves and clappers introduce to fluid dynamics within the system.

Understanding the pressure loss is crucial for fire protection engineers and emergency responders, as it affects the overall effectiveness of the sprinkler system during an event. Accurate calculations of pressure loss help in hydraulic design and ensure that the system maintains adequate pressure at the sprinkler heads for optimal operation.

While the other values represent potential pressure losses, they are either too high or too low compared to standard practices observed in the industry, making 25 psi the most reliable and typically accepted answer for pressure loss in this context.