In sprinkler systems, what term refers to the network that distributes water from the main to branch lines?

Prepare for the First Responder Inspector Test. Utilize sample tests, detailed explanations, and interactive flashcards to boost your confidence and knowledge. Get exam-ready!

In sprinkler systems, the network that distributes water from the main to the branch lines is the cross mains. They form the horizontal distribution paths that feed the smaller branch lines which lead directly to the sprinklers. A riser is a vertical pipe carrying water to different floors, a main drain is used to drain the system for testing or maintenance, and the fire department connection is the external point where a fire department pump can supply additional water. Cross mains specifically describe the distribution network fans out from the main to reach the branch lines.