Which characteristic describes a dry sprinkler system?

A dry sprinkler system is specifically designed to prevent water from being present in the piping until the system is activated, which is particularly beneficial in environments where temperature fluctuations can lead to freezing. The most notable characteristic of a dry sprinkler system is that it contains pressurized air or nitrogen in the pipes, which keeps the water supply out until a sprinkler head operates. This feature significantly reduces the likelihood of freezing, making it ideal for buildings in colder climates or unheated areas.

While options regarding water flow and system costs are relevant to the functionality and design of sprinkler systems, they do not define the specific advantage and purpose of a dry system as effectively as its reduced vulnerability to freezing.