Not sure what you're asking for, so I'll give you 2 solutions:
1) So that particular sprinkler instance is part of a group of sprinklers that are part of a system. Let's say it is part of a Piping System; you would need to tab select until you can select the entire system that it is a part of, then you can change the System Name; you can also change the type of Piping System by going to "Edit Type". Be aware though that these changes will make this change to all of the components that are part of that system.

2) That being said, if you are trying to remove a sprinkler from a system, you would need to similarly tab select until you get the system it is a part of, go to the "Modify | Piping Systems" contextual tab, select "Edit System"

Then remove the fixture(s) that you are trying to separate, and Finish Editing System. You will then need to connect the fixture(s) to the intended system.
