re: Sprinkler help. Why does one section keep going on when the others do? Details below

Just so I get this right, you're saying that when you turn a zone on, the valve that is wired to the Hunter Node comes on at the same time?

If that is the case, its not a wiring problem because that valve is not connected to the control timer, it uses the Node to activate it. It could be that the valve has debris around the diaphragm and when the pressure changes by turning a different zone on the valve activates or the diaphragm could be worn out, it does happen occasionally.

It should be easy to find the valve with the node attached. The node should be directly wired to the valve, the wires are not very long (less than 12"), you should be able to trace the wires by hand to find the valve, it might require a small gardening trowel to dig the dirt from around the valve.

If the diaphragm is not good, you don't have to replace the entire valve which would require you to cut it out and do some minor plumbing work. The bottom half of the valve that is connected to the main water line and the sprinkler zone should be fine, all you would have to do is shut off the water, take the top cap off(should be attached with screws), and remove the guts. Unscrew the solenoid that is attached to the Node, leave it wired to the Node, replace the guts and top cap of the old valve with new ones (buy the complete valve and use the parts) and screw the solenoid back on and you should be good to go.



Replace everything except the Valve Body. You will not be able to use the new solenoid, it is 24v, the Node requires a DC latching solenoid so use the one that is already attached to the Node.

Hope this helps.