There are no directions for putting in a transom drain in the plans. I had read that with a transom drain, some skilled boaters can remove water from their boat's hull by simply getting on step, removing the drain plug, and letting it drain out while underway. I just wanted a way to make sure that my boat's hull did not fill up with rainwater while it was sitting on its trailer in my backyard.

A one-inch copper pipe is being cut to size.

The pipe sticking out the transom. The hole looks kind of large, but it was easily filled by a slurry of epoxy and wood flour. I don't know if I have said this before: first you wet the pipe and wood in the hole with your epoxy mix, then you force in your wood flour mixture. If I recall, I put a big glob around the circumference of the pipe, and then pulled the pipe back to the proper position in the hole.

Since I had sealed the bottom of bulkhead 17 (stationed 2-feet in front of the transom) I had to extend the pipe through the transom well into the cockpit. The same wood flour mixture closed around the pipe here as well.

Here it is reaching into the cockpit.

Supported and sealed from this end, too.

A picture three years later, and the seal is just fine. Note the drain plug that I am using.

A drain plug is also used at the exit end of the drain pipe. To date, there have been no water incursions from the pipe into the cockpit, or even the transom well.