Problem inground sprinkler system how find zones?
Apt complex has 20 zones. All work except 2 and the zone control boxes are no where to be found to manually open solenoid valves. Big question is on one of the working zones, I can manual open solenoid valve and about 15 sprinklers come on, but when turn the zone on for test at control panel, 15 more come on along with the previous 15.