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How do I manually open a zone control valve without using the controller?

April 26, 2017CONTROL controller valve zone

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How do I manually open a zone control valve without using the controller?

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Simply twist the solenoid (the black cylinder with 2 wires coming from it) on the valve counter-clockwise 1/4 to 1/2 a turn. To shut off the valve, twist the solenoid clockwise until it is snug on the valve.