How to Shut Off Water to a Sprinkler System with a Backflow Preventer

Learn the step-by-step process to turn off water to your sprinkler system with a backflow preventer safely and prevent damage during winterization.

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To turn off water to a sprinkler system with a backflow preventer, first locate the system's main shut-off valve. This valve is typically found in the basement, garage, or near the water meter. Turn the valve clockwise to the off position. Next, locate the test cocks and shut-off valves on the backflow preventer device itself. Close the valves by turning them perpendicular to the pipe. Finally, drain any remaining water in the system to prevent freezing and damage by opening drain valves or using compressed air for winterization.

FAQs & Answers

  1. Where is the main shut-off valve for a sprinkler system usually located? The main shut-off valve is typically located in the basement, garage, or near the water meter.
  2. Why should I drain the sprinkler system after turning off the water? Draining the sprinkler system removes remaining water to prevent freezing and potential damage during cold weather.
  3. How do I close the valves on a backflow preventer? You close the test cocks and shut-off valves on the backflow preventer by turning them perpendicular to the pipe.

Watch More

For more tips on sprinkler system maintenance and winterization, check out our videos on how to drain sprinkler lines properly and how to test your backflow preventer to ensure your irrigation system runs smoothly year-round.

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