How Do I Turn Off My Sprinklers?.... Leaks Happen! If you own a sprinkler irrigation system, it is only a matter of time before you are faced with a broken sprinkler head or broken pipe. Unfortunately, these types of thing never happen at the most convenient time. Being able to shut off the water supply to your sprinkler irrigation system until it can be repaired can save you on your water bill. If you have a leak that only leaks when the sprinkler system is running; the solution is simple, just turn the sprinkler irrigation controller to the OFF position.