Forespar – Thru-Hull/Seavalve Instructions

(In response to a request asking for advice on a leaking thru-hull…)


I had a leaking seacock on my C380 Hull #5 about 4 years ago. It is important to figure out what part of the seacock is leaking. My leak was between the valve bottom flange and the hull. When I launched in the spring the wood had dried out over the winter and shrunk a little and thus a leak. As the wood absorbed some of the water it would expand and in a few weeks it would stop for the summer. The following fall on the hard I removed the seacock and re-bedded it. It was an interesting project but one I would not attempt in the water. On the other hand, if the leak is something to do with the valve above the base flange it is doable in the water. If it were me,

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