Luiz, Thanks for the valve. It would require access to both sides of the hull which, I don't have. (It would also require a way to lift the small end unless the large part would be installed on the outside).
Exactly. It would be installed upside down, close to an inspection hatch - it is good to have at least one per hull.
Two questions:
Would it make sense to install a tire valve and pressurize the hull before sailing?
Also, has anyone ever calculated if it would make sense to fill the hulls with a lower density gas in order to reduce displacement?