Foam brush solenoid problem

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When you turn off the foam brush and the chemical still comes out, that is bad.  It also says there is crap in the solenoid valve.

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You want to check the plunger, usually their will be crap making it be stuck open.  So you have to take the valve apart.

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This is about as bad as I have seen.  But usually the crap is smaller.

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Sometimes the rubber plunger thing (last picture) can be messed up to allow a constant stream.

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