I was cleaning my NYOS Quantum 120 skimmer, and this small rubber washer popped out of nowhere. Where does this go? All the instructions don’t mention this piece.
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It goes between parts 15 & 13 on the diagram in post #3. It goes on top of the shaft of part 15, then part 13 goes on top of it and the screw (I blieve part 21) goes through it.