Troubleshooting Valve Issues Using A Voltmeter

In this video, Sprinkler Warehouse Pro, Dwayne Smith, shows you how to use a voltmeter to find the cause of a zone in your sprinkler system not turning on or off. He covers the steps you need to take to find out if it's the valve, controller, or wiring that is causing the problem. Available at SprinklerWarehouse.com sku#: DM6850T
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[@dskrpncs]

I have 2 zones that have poor pressure. When I open them manually with the bleeder they still have low pressure. I dont believe that it's a root pinching the line as I dont hear any pinches anywhere in my yard. Thoughts of what may be causing this?? You say to replace the valve in this video. How about just replace the diaphram and the solenoid?

[@gettingandmaintaining6-pac220]

Thanks!

[@davidrawlings7325]

What if you can’t get any voltage on any zones when put to manual ALL?

[@curtisminson2696]

Don't replace the valve until you take the valve apart and check if the diaphragm is damaged or has a film on it making it not being able to close. Also check if the solenoid is loose and possibly the bleeder screw is slightly open.

[@koaasst]

take the valve apart and get the piece of debris out, dont change the valve, thats a possible monumental pain in the butt, unless buying even more expensive repair pvc fittings.

[@kevreilly7]

Or buy a bunch of the same valves. So when one acts up all you have to do is change the solenoid and not the hardware.