question winterization lawn sprinkler system

[BA]

hi,

I recently bought a house and am trying to determine if I must do any winterization for the sprinkler system.

I live in northern utah (does get cold in the winter). my sprinker lines are made of poly-pipe (the black pipe).

I surely want to avoid pipes freezing and bursting (if that is indeed possible).

a friend earlier today told me if my sprinker lines are poly-pipe then it is very unlikely they would freeze and burst).

I all the sprinkler line are underground.

can someone tell me if I need to do any winterization or am I OK to do nothing (but shutoff the main water valve)?

all responses are much appreciated.

BA kaysville, UT

[Eggs Zachtly]

You need to blow out all of the lines with compressed air. As it's your first year with the system, it's probably best to hire a sprinkler service company to do it.

[Mike]

Most new installiations include the service for free the first year, too bad his didnt! But defently get it blown out. Pipe if filled with water WILL burst if frozen.