Sprinkler Heads
It sounds strongly like you are losing water somewhere, as your system lacks
enough pressure to pop up the heads. Or, the valve on that circuit may be
defective. Check to see if it has a manual knob that allows you to open
the valve manually, without the need for the electrical valve to work.
If you leave the circuit on long enough, you should be able to see a
concentrated flooded spot somewhere.
James
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