Yesterday, I got another mowing job for the upcoming season. The neighbor across the street also wants a price, but they weren't home. I walked the yard, and saw two sprinkler heads that seem way too tall. So, I checked them out, they're just sitting in the holes. I picked them up, the head itself, an "orbit hardtop" appears to have something broken off inside on the bottom. I haven't worked with irrigation systems before, but now is as good a time as any to learn. What's down there, generally? Will I have to dig to find out, or is it generally a "T" under each head? Both of these heads are broken the same way, could be from getting run over with a heavy machine. I'm thinking that I may have to dig under the line, to lower it when making repairs, to prevent it happening again. Maybe buy a shorter head to replace it with? As I said before, I haven't worked with sprinkler systems before, but I would like to get into it a little bit, for my mowing customers. I don't plan to jump into installing them, but I should be able to do repairs, to keep other contractors off "my" lawns. I'll be going back today around noon to give a price for mowing, and plan to tell her about the broken heads at that time. Crawdad One more thing, could they break like that from freezing, not being cleared before winter? I don't want to blame the last mower man if it wasn't him.