Quote:
Originally Posted by reefwars
even if you did it to the plywood the bulkhead should still work , the gasket has to be on the flange side always never the nut side, the seal is in the gasket not the nut, the nut just forces the seal.
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Is it possible that the plywood is uneven enough to cause the gasket and fit on the glass side to be off a bit on one side, i.e. not flat against the glass?