Zone loses pressure
Starting my system back up after the winter. Dug out all the heads and everything works well except for one zone. It's 5 spray irrigation heads, when I turn it on (manual in the box) it starts off strong then after about 5 seconds pressure drops and the heads all go back down. Any idea what causes this? Bad solenoid? Leak in the system? I'm kind of at a loss.
Thanks for your insight.