I do irrigation maintenance on a commercial system. 12 zone with a Rainbird ESP-12 LX plus controller and an electrical pump relay. The pump (3 hp / 240 volt) runs. System is a remote selonoid valve system (not an index valve system). Primarily I adjust the timer for the seasons, fix broken or clogged heads, fix the spray pattern or whatever. But I also do first line of defense when something else goes wrong. I think I know what the problem is but I want to double check and make sure I didn't forget something simple. Problem: At first glance it appears that no water is exiting the heads on any zones. I checked the pump to make sure it worked. At first it didn't, but there is a switch between the relay and the pump and someone had switched that to off. I switched that to on and I fired the pump, I could hear and feel water in the pump but no visible water coming out from any sprinklers, regardless of which zone I tried. I tried multiple zones in case one had a sticking valve. I also went to a remote box and manually opened the valve. When I did this, I was right next to one of the head on that zone and noticed water flowing from the head, just enough to spray past the nozzle of the pop-up (1 inch max) then it surged up to (3 inch spread) then fell back down to 1 Inch. I checked for prime at the pump and re-primed it. No significant change. I went to each of the well heads (1 1/2 inch pvc 13 feet apart) and checked for flow vibration and didn't really feel or see any. So I shut down the pump then removed the "priming cap" and filled the furthest one from the pump with city water and capped it, then filled the nearer one with water and capped it shut. Still no significant flow at the heads, but now I can hear and feel water in the well pipes. then I reprimed at the pump. Still no volume increase. My thoughts: 1. the impeller is broken and isn't pumping water properly 2. the circuit lost a leg and my pump is only running on 120 and doesn't have enough power to push the water 3. We have had almost no rain in the past 2 months and maybe the wells are fairly close to dry. I will be checking #1 and #2 tomorrow. I didn't have the correct tools to do that today. Usually it is just some genius turns off the controller box. Really hoping it isn't #3 Anyone have any other ideas of what I can check or what it might be. Thanks in advance for any suggestions. And this is florida and it is most likely a shallow well system.