When the sprinkler went on the other day, I discovered a geyser in the back yard. I turned off the system and waited for the water to be absorbed. There was no sprinkler head there, so I dug a hole 24" sq X 12" deep. I couldn't find anything right off that looked like a leak, but I did discover 6 lines that criss crossed under there. (This was done by a professional landscaper!) Some of lines have L connections, and some don't. Three of them are directly on top of one another running exactly the same directions and are difficult to get to. How the heck am I supposed to find which one has the leak? Or do I have to cut them all out? I just don't know where to begin.

Thanks.