Every year you need to”blow out” your lawn sprinkling system so that you do not freeze and break the pipes or sprinkler heads. All the water needs to be drained from your system.  What water remainds in your system can freeze, expand and then crack the PVC piping or the sprinkler heads. Freezing water in the backflow assembly will also damage the internal components. To minimize the risk of freeze damage to your irrigation system, you’ll need to “winterize” your irrigation system.  This is not a project for the average...