Is there any way I can tell whether my pump has a problem or my well is no good? I have an irrigation system with a 1.5 hp F&W pump. Everything worked fine until recently. I used to get about 30 gpm, but now I am only getting about 15 gpm and none of my rotors will turn. I have 4 rotor zones and none of them operate correctly. I have 2 mist head zones and they work ok, but not as good as they used to. Any help would be much appreciated.