After checking the system I found 13 rotors leaking, sticking, not rotating. Also 10 heads in the front yard sticking leaking or unable to adjust, there are a few other low heads on left side of driveway, however the grass seems tall. I also found 2 nozzles incorrectly sized, and 1 cap for a head underneath the back patio. In total 13 rotors, 10 6 inch heads, 2 nozzles, and 1 threaded cap, 15 minutes of location time for head under patio.