What is the maximum number of sprinkler heads that can be installed on a branch at once?

The maximum number of sprinkler heads that can be installed on a single branch line is determined primarily by hydraulic calculations which ensure adequate water supply and pressure to each head. In this context, having eight heads on a branch is generally considered optimal for most installations because it balances the water distribution and helps prevent performance issues during activation.

When too many heads are added to a single branch, it can lead to inadequate pressure or flow issues, diminishing the effectiveness of the system in controlling or extinguishing a fire. The design standards set forth in the National Fire Protection Association (NFPA) guidelines typically align with this maximum to ensure compliance and safety.

Other potential answers may exceed this recommended limit, risking the jeopardization of the fire suppression system's effectiveness, either through flow insufficiency or pressure drops, which could compromise the system’s ability to function properly during an emergency. Hence, selecting eight heads is in line with accepted engineering practices and safety protocols in fire protection systems.