How water flows through a sprinkler system & how to turn off water to your sprinkler system. Shutting water off to your sprinkler system without turning it off to your house. Where is the shut off to my sprinkler system? If I remove a sprinkler head will it spew water? Where is my backflow device on my sprinkler system? What if there is no water in my sprinkler system? What is a Master Valve. Where is my Master Valve? What if nothing is working on my sprinkler system? Sprinkler Repair DIY. Sprinkler Repair. Do it yourself sprinkler repair. Sprinkler Troubleshooting. How a sprinkler system works.