We have had irrigation working fully for the last 3 years but this season when I turned it on NOTHING.... The Toro Controller says its working but nothing is happening. All zones off, in auto or manual modes. I have followed all the standard online tutorials, tested the controller for voltages and resistance to lines. Disconnected each solenoid and tested resistance all ok. interestingly theres a separate control box on a single pipe which in series has a flow on/off, two odd looking cylinders and a flow on/off. the first flow is on and the last is off. if I manually turn the last flow control on then ALL sprinklers go on but are not controlled by the Toro controller. All but 2 zones. So I figure I don't have a water issue but what could the mysterious little cylinders be? they are at a 45 degree angle in line in the pipe. The pipes are buried so I am not sure how they connect. We have a Well btw and a pressure tank.