I took my boat out of storage and decided to do a good cleaning of the cuddy cabin. I noticed that there was mold that was a little obscured by a little shelf. The mold appears to be coming from the anchor well drain, which has a tube running from the anchor well to the starboard bow where the drain empties into the water. My best guess is a seal around the drain. I am curious if this is a standard part and what exactly would the name of it be?