If you haven't already done so, it's time to winterize your irrigation system before more freezes occur. Any freeze can damage an irrigation system and come spring you will have repair issues on your hands that may, at the very least, be tedious or, at most, expensive. I don't know much about the technicalities of in-ground irrigation systems, I simply expect them to work when I turn them on. I dig the holes and trenches when pipes have to be repaired, while my husband is the brains behind making the system work. I do know that the first thing to …