I added a couple of branches to my sprinklers over a year ago to add some more sprinklers to cover some brown spots on my backyard grass. There are now 16 sprinklers with 4 off of two branches and 8 off the center branch.
There are some brown areas now and it looks like my pressure is way down. None of the sprinklers are popping all the way up and the spray looks lower than it used to. They are set to run at midnight and 6:00 in the morning, so I don't usually see them running.
They look normal in the pic but they are not popping up all the way and not spraying as far as they used to. They did have good pressure after I added the extra sprinklers - I even capped a couple off to see if it helped (it didn't).
My guess is that there's a leak somewhere. Either one of the PCV joints broke, one of my splices for the new branches broke, I broke a line while planting a bush, or a gopher chewed into a line.
How can I troubleshoot to narrow down to where the issue is? Is there something I can stick down into a sprinkler connection and stop the water flow to the rest in that branch? My best idea is to get an inline valve and stop off the center line to see if that's where the issue is but that seems like a bit of work for a test.
The lines are 6 inches below the ground so I don't know if I'll see water - especially since I have gophers that have made tunnels that the water could be flowing through (I have an unlimited supply of gophers from the city's fenced-in, empty field next to me).