Check valve on Aquasafe ro/di

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Pulled apart the check valve on mine and found corroded. Got a new check valve from Aqusafe (is a one-way check valve), replaced it along with a new ASOV and system is back working okay.

Is the check valve working, any chance your ASOV is installed incorrectly?

From the diagram, my ASOV has the screws on the top, side labelled "OUT" is on the left.