What is the proper name for a "valve" that would allow an air inlet to be turned on or off?
I am thinking of adding a naca duct with some type of valve that will close off entry of both water and air, and maybe design in some kind of water separation chamber. I have not had much luck with google trying to find examples.
air valve?
Here is an example of a water separation chamber, known in boating as a Dorade:
