O-Ring, Chemraz, This is the O-Ring that is installed on the top of the fast drain shaft.
This O-Ring makes a seal with the bottom of the check valve that is located on the bottom of the rotor when the drain shaft is in the up position.
If this O-Ring is bad you will get leakage out of the interface between the top of the drain shaft and the check valve that is on the bottom of the rotor.
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