Re: Bilge drain hole. How to make one after I put in a new transome?
Just for clarity, a transom drain tube is different from a garboard drain. Garboard drains are flanged, use bolts for installation and have a theaded pipe plug for opening/closing. Cost is about 4X more than transom drain tubes. They are typically placed in the center of the hull at the lowest point and kept open during dry storage to keep water from collecting deep in the bilge.
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I have a 1960 18ft fiberglass cuddy which is completely open behind the rear seat. There is a full transom width 8" 'shelf' about 8" from top with the brass drain tube flared on both sides. I call this the splash well drain. The rest of the area behind the seat is open down to the floor where the battery sits and has another drain tube with both ends flared. I call this the transom drain. About 5" below that there is what I call the bilge drain that should take the plug. Outside access only....can't get to it from inside. Now this 'bilge' hole is only 3/8" (looks threaded) and 1/4" from the bottom so no flanged fittings will work here. Has anyone ever seen this or have any thoughts on replacing the 'bilge' drain? Thanks, Steve