What is the purpose of a branch line in a sprinkler system?

The purpose of a branch line in a sprinkler system is to distribute water to the individual sprinkler heads. Branch lines are essential components of the system because they serve to carry water from the main supply lines—where the water is pressurized—to the areas where the sprinklers are needed for effective fire protection.

The design of branch lines ensures that they can effectively convey the right volume of water to each sprinkler head, allowing for uniform coverage and adequate response to potential fire hazards. Without properly functioning branch lines, the sprinkler system would be unable to deliver water to the sprinklers, undermining the system's overall effectiveness in fire suppression.

The other options, while related to plumbing and sprinkler systems in general, do not correctly describe the specific role of a branch line. Connecting to the main water supply is the responsibility of the main line, supporting the weight of piping is typically addressed through hangers and brackets rather than the branch line itself, and pressure regulation is managed through specific devices rather than being a function of the branch lines.