How To Turn Off Sprinkler System Valve. The controller is what tells the sprinklers to turn on in the first place. This valve, referred to as the shutoff valve, is used to shut down the sprinkler system for repairs or winterizing without shutting off the water to the entire house.
This will cancel any of the scheduled sprinkler times and kill the whole system so that you can inspect it safely. Turn off the water to the entire sprinkler system. If your lawn sprinkler system has a leak, turning the controller off won’t stop the water.
If your lawn sprinkler system has a leak, turning the controller off won’t stop the water.
If you do not have a rain or rain/freeze sensor on your irrigation system you will want to turn it off at the controller. A globe valve has a round handle. Subsequently, question is, why doesn't my sprinkler shut off? Here are some of the most common reasons that a sprinkler system won’t turn on, along with how to address the issue: