To replace a sprinkler head, what is the next step after the main valve is closed?

After closing the main valve, draining the system is an important step before replacing a sprinkler head. This process ensures that the pipes are free of water, which reduces the risk of water spurting out when the old head is removed or the new head is installed. Draining the system helps maintain safety and cleanliness during the replacement process, making it less hazardous for personnel involved.

Following this, it would be necessary to install the new head, check for leaks, or notify a supervisor, depending on the specific protocols of the fire safety program or organizational procedures in place, but draining the system is the critical preparatory step that facilitates safe and effective replacement.