The short answer
Arrange winterization in fall before your system is exposed to damaging freezing conditions. There is no single date that fits every property and every year; keep an eye on the forecast and book ahead.
Off does not mean empty
Switching the controller off prevents scheduled watering. Water can still remain in pipes, valves, heads, and exposed components. Your system needs an appropriate winterization method, not just a paused timer.
Prepare for your appointment
Locate the controller and irrigation shutoff. Make gates accessible, secure pets, and tell the technician about any zones that were not working. Do not operate unfamiliar valves or electrical equipment to prepare.
Leave compressed air to an experienced professional
The correct method depends on the system and manufacturer’s instructions. Incorrect air pressure, airflow, or connection points can cause damage or injury. Ask your service provider to explain the shutdown and any issues found.
Further reading
Hunter: winterizing an irrigation system ↗Check current supplier and manufacturer guidance for your system.
A useful next step.
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