Here is a quick and easy guide on how to winterize a sprinkler system with backflow preventer. Slowly shut the water off that’s coming from the meter. You know they're in the direction of the pipe. So ...
Start your search inside. Many shut-off valves are located in easy-to-access areas indoors. If yours is, it should only take a couple of minutes to find it. The main water shut-off valves are ...