THRU HULL

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by Craig Roser 06 April 2007 Plumbing 15 photos 4535 views

New thru hull for raw water washdown now, AC later. Duplicate of factory install. First hole ever so lots of anxiety.

Starboard side of keel. Head direct overboard and macerator pump discharges.

Port side of keel seems to be perfect location.

Factory kindly provided backing plate typical of their installs.

Testing position of thru hull closed.

Testing position of thru hull open.

Pilot hole drilled from inside. Scary pulling the trigger on the drill!

Pilot hole from outside.

Final hole 1-3/8 inch diameter.

Hull is 7/8 inch thick. Cutting tool was new cup style hole saw.

When 60F, plate will be bonded with epoxy. Plastic tube will align plate with the hole in hull.

Backing plate epoxied down with West System.

Closeup of epoxy faired with plastic spreader with corner cut to a quarter circle radius.

Thru hull bolted in. Machine screws are only available in whole inch sizes after 2".

Boatlife caulk can be sanded once it is cured. Manufacturer claims you can install it underwater.

Once caulk cures, a light sanding, cleaning, then bottom paint.

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Sincerely,

The International IPYOA administration team.