What's a good way to figure out the function of a manual valve, i.e. what it connects to etc.?
I have three manual in-ground valves. One of them has a handle that's about to break, one doesn't have a handle and the third has to be shut because when it's open water comes out the pipe that's connected to it. I'm not sure if that water coming out of the pipe is a leak or what so I'm trying to understand what the valves are for and what the pipes feed.
Is there a recommended process for basically creating an as-built drawing of a sprinkler system including tracing where all the pipes lead?