If you live anywhere that may experience a hard freeze, you can save yourself some expensive repairs by winterizing your irrigation sprinkler system. Water in the lines can freeze and burst the pipes. Water expands as it freezes and this expansion is what causes burst water lines. Unlike your household water supply line, irrigation lines are not buried very deep underground and some parts are fully exposed to the outside air making them susceptible to freezing.
Most irrigation systems are made from PVC or Polyethylene pipe, both of which will crack easily from the force of frozen water. Water left inside these pipes during the winter could easily freeze and crack the pipe. In the spring, you will find these cracked and broken lines as soon as you use your irrigation sprinkler system and you will need to call the irrigation company out to fix the broken lines.
Save yourself some trouble and money by making sure to have your irrigation system winterized. The easiest way to winterize your irrigation system is to pay your irrigation company to do it. They have the knowledge and experience to get it done right. Your landscaper or lawn care professional may also have some experience with winterizing irrigation sprinkle systems.
You may be able to winterize your sprinkler system yourself, but if you are not sure how to do it, you are better off letting an expert handle the job. It is easy to leave some water in one or more of the lines and the result will be a broken line that must be fixed come spring.