Be Sure to Winterize Your Underground Sprinkler System
1. Shut Off the Water
2. Turn Off the Timer
3. Drain the Water – Might consist of Manual Draining,
Automatic Draining, or Blow-Out Draining
4. Insulate Above- Ground Components
5. Always check the owner’s manual before winterizing!

Source: https://www.thisoldhouse.com/lawns/21512565/how-towinterize-
a-sprinkler-system