How to Winterize an In-Ground Sprinkler System Before a Freeze
Key Takeaways Shut off the irrigation water supply and turn off the controller before freezing weather arrives. Drain water from the pipes and above-ground components using the method your system supports. Protect an above-ground backflow assembly carefully; its valves and test cocks may need to remain partly open while it drains. Use compressed air only when you know the system’s requirements; never blow out a zone a second time after it is dry. Table of Contents When should you winterize an in-ground sprinkler system? What to do before draining the sprinkler lines How to drain a system with manual or automatic drains When is compressed-air blowout appropriate? How to protect the backflow preventer from freezing Which winterizing method fits your situation? Common winterizing mistakes to avoid Spring restart: what to check before watering Frequently Asked Questions Key points to remember To winterize an in-ground sprinkler system before a freeze, stop automatic watering...