One Way Motorwell Drain Tubes

[Capt Terry]

Thx Michael, now that you mention it I saw duckbills Years agowhere theywere being used as a bilge drain plug. Then heard about boats sinking after they got old or fatigued. In a motorwell application that won’t happen. But am guessing they worked as drain plugs due to the venturi effect running through the water, which wouldn’t br the case for a motorwell drain.