DW is not draining. Already tried replacing drain pump which did not solve problem. Took out drain hose (WPW10545287) to clean out any obstructions. I noticed that the drain hose has something that feels like a valve near the elbow end. Does anyone know if this is the check valve? If yes, is it to prevent water from reentering the sump area? Is this the only check valve on this model (WDT920sade2)? Can this check valve get easily obstructed or damaged? I would greatly appreciate any knowledge regarding this issue.
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