How much weight should a hanger be able to support in a sprinkler system?

In a sprinkler system, hangers are crucial components that provide support and stability to the piping, ensuring it can withstand various loads during operation. The correct response indicates that a hanger should be able to support the weight of a water-filled pipe in addition to an extra 250 pounds.

This specification is important because it accounts for both the weight of the piping when it is full of water and any additional loads that may act on the system, such as stresses from seismic activity, thermal expansion, or maintenance activities. Ensuring that the hanger can support this total load prevents potential failures such as sagging piping or even catastrophic system collapse, which could lead to significant water damage or safety hazards in the environment.

Other options either suggest a lower additional weight capacity or an insufficient understanding of the proper safety margins required in sprinkler system design, leading to potentially inadequate support for the system's needs. Therefore, the inclusion of a 250-pound allowance ensures that the installation adheres to safety standards and best practices in the industry.