All zones turn on

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tbris

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When i turn on an individual zone from the control box, all the zones turn on. There are 6 total. All zones turn on as well when I turn on the manual lever on the anti-siphon auto sprinkler valve. Any thoughts as to why this is now occurring?
 

tbris

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Another thought

I'm also getting flow to all zones with the manual lever turned on with the power supply of the control box disconnected.
 

Jimbo

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Sounds like all the zone valves stuck open. Not a likely scenario. Give us some more details of the system, pics of valves, etc.
 

hj

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valves

If it is a new system all the valves have their manual controls opened. Otherwise you have a lot of bad valves because a good valve, with the manual opener off, CANNOT operate with the power disconnected at the control box.
 
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