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Replacing Every Thru Hull on Our Sailboat (DIY Boatyard Refit) - TRUDesign
March 8, 2026 · 14 min · 14K views · Si Sunthon, Thailand
Camille grinds bronze through-hull on sailboat hull
What this video covers
Camille Milligan and Jesse replace the aging bronze through-hulls and seacocks on their sailboat with TruDesign composite fittings while hauled out at Rebak Marina in Langkawi, Malaysia.0:15 The crew removes the old, seized bronze hardware by grinding the outer flange until the fitting can be driven through the hull from the outside.1:56 After measuring the existing holes and hose diameters with electronic calipers, they source replacement TruDesign components from Marine Supplies Asia in Chenang.6:59 The installation process involves sanding the hull surface to bare fiberglass, cleaning with acetone, and applying Sikaflex sealant to the skin fitting.9:27 The crew custom-cuts the threaded skin fittings to ensure a flush fit before threading on the seacocks and securing them with a load-bearing collar for the engine intake.10:37 After allowing the sealant to cure for 24 hours, they tighten the fittings and reconnect the hoses.12:38 Replacing corroded, seized bronze through-hulls with composite fittings eliminates the risk of structural failure and ensures reliable operation of the vessel's underwater valves.
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