Thanks, I get it. There is a floor in the port/spout since it is bent to go inward and downward to the smoke units. That way, there is no danger of the plug going down into the channel. O rings are common at the hardware store; have to see if there is one .140" OD there. My foam piece is still intact but came off; will try a glue also. If that fails, then a piece of an O ring.
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