Ok, so I was looking at a repair earlier tonight. Problem: LOW/NO WATER PRESSURE AT THE VALVES. Customer has raindial control and they have 6 stations. Water meter is at the curb, and the backflow T's in up by the house. Unfortunately the BF is underneath mature indian hawthorne and carissa holly shrubs. I opened the manual bleed valve (rainbird dv series) and barely anything trickled out. extremely low pressure. Also tried running manual station from the controller, it opens up, but very low pressure. Just bubbles if anything from the heads. This happens at all six stations, so I know its not a solenoid or diaphragm issue. I did not have a pressure gauge with me, ( i know i know) but we manage a large house across the street, and this block has great pressure. Coming out of the backflow is like 1 1/4 black (poly?). Sub division is about 16 years old. there is not a wire in the wiring bundle at the controller for a master valve. The water meter is not spinning, so that eliminates a possible mainline leak. UNless there is a MV, but just not a wire? I did find a large underground hole right after the BF where it looks like there was a break in the pipe and it eroded out tons of soil. But if there was a break, the meter would still be spinning. The only way to find out what this hole leads to, is to dig up all of the mature bushes. (last option I want to mess with.) Only thing I could think of is that there might be a gate valve right after the backflow? But heck if I know where to find it. I'm confused? What else could be the issue? No pressure at valves, but no leak and no master valve?