Less pressure with solenoid than bleed screw

ianjohnson(SoCal)July 3, 2011

I have some zones that are losing pressure. I find that when the timer opens them, the sprinklers will not pop all the way, but they will if I open the bleed screw.

I've found a couple sections of wire where the insulation has been stripped and there is some exposed wire that is corroded. Can this cause a reduction in the voltage getting to the solenoid? Can reduced power to the solenoid cause a reduction in pressure, or is a valve fully open or fully closed with nothing between?

I've solved this problem before by simply replacing the valve, but this is a good brass one, and I would rather try to fix the actual problem if possible.

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The first thing I would do is repair the wires then check if the valve has a flow control knob. If it does then make sure it is open all the way. If that does not fix the problem the solinoid needs to be replaced.

    Bookmark   July 4, 2011 at 3:00PM
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