What is the purpose of a sprinkler system feed main?

The purpose of a sprinkler system feed main is to connect the riser to the cross mains. This connection is essential because the feed main is responsible for delivering water from the riser, which is typically the vertical pipe carrying the water supply, to the cross mains, which distribute the water to various sprinkler heads throughout the building. This configuration ensures that the sprinkler system can effectively deliver water to the areas where it is needed during a fire event.

Water enters the system through the riser, is then channeled through the feed mains, and subsequently flows into the cross mains, facilitating the operation of the sprinklers. This setup is crucial for ensuring adequate water flow and pressure is maintained, allowing for a rapid response in the event of a fire, thus improving the effectiveness of fire suppression efforts.