Sailing Catalpa · video

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The crew of the Catalpa replaces aging through-hull fittings and seacocks while the boat is hauled out for maintenance. The project addresses failing valves that no longer shut off properly and show signs of electrolysis, evidenced by pink discoloration and pitting on the metal.9:11 To remove the seized through-hulls, the crew uses a spinner tool and a leverage bar; when the internal locator lugs snap, they use a die grinder to cut the outer rim and push the fittings through the hull.13:10 The crew avoids using 5200 sealant, opting for 4200 to ensure future removal is possible.5:17 After removing eight valves, the crew cleans the housings in vinegar and wire brushes them to assess their condition.21:04 Rather than replacing the entire units, they plan to install rebuild kits containing new balls, valve stems, and bushings.22:54 The process includes documenting the orientation of each valve with photographs before removal and inspecting associated hoses for cracks.16:52 The crew intends to overhaul the vessel's bonding system to prevent further electrolysis.9:21

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