For a system installed in a cold environment, what must be done to protect the sprinkler piping?

In a cold environment, protecting sprinkler piping is crucial to prevent freezing and ensuring the system operates effectively when needed. Insulating the piping is a common and effective method to retain heat within the pipes, thus minimizing the risk of water freezing. Insulation helps reduce the exposure of the piping to cold air and provides a barrier that can maintain a higher temperature.

Using dry systems is also an appropriate measure in cold environments. Dry systems contain air or nitrogen under pressure to hold back water. In these systems, water is not present in the pipes until the sprinkler head is activated, which effectively eliminates the risk of freezing since the water does not sit in the pipes when temperatures drop. This combination of insulation and utilizing dry systems is particularly valuable in environments where constant freezing temperatures are a concern.

While other strategies, such as using insulated jackets or electrical heat tracing, could provide supplementary benefits, the primary methods for safeguarding sprinkler systems in cold environments center around proper insulation and employing dry systems to mitigate freezing risks.