What do "pipe hangers" do in sprinkler systems?

Pipe hangers are essential components in sprinkler systems, primarily designed to support and suspend sprinkler piping from various structural elements like ceilings or walls. This support ensures that the piping maintains proper alignment and prevents unnecessary stress or deformation, which can lead to leaks or other failures in the system.

The role of pipe hangers is crucial for maintaining the integrity of the sprinkler system, as they help distribute weight evenly and reduce the risk of damage from vibrations or movements. Using appropriate hangers and spacings, according to NFPA 13 guidelines, is vital to comply with safety and performance standards.

The other options refer to functions not typically associated with pipe hangers. Controlling temperature, managing water flow, or filtering debris involves different components within the plumbing and fire protection systems. Thus, the specific function of supporting and suspending the piping makes the first option the correct one.