Prepping your sprinkler system for winter

September to mid-October is the best time for your landscaper to prepare your sprinkler system for winter. The sprinkler system an be totally destroyed by a lack of preparation before winter. In the northeast where the soil stays frozen for months , irrigation pipes can burst and sprinkler heads shatter if there is water left in the system to freeze.It is essential make sure there's no water left in the system, and that any complex moving parts have been removed or protected.

*Note a normal residential compressor is not enough airflow to complete the preparation for winter

https://www.landscapingnetwork.com/sprinklers-systems/winterize.html