07-17-2010, 03:05 PM 
		
	
	
		What are you filling with?  We have some pontoons that use an adaptor that look like that one.  With the valve closed I can't blow it up by mouth, or even with one of the smaller pumps that we have, but I can fill it with a two stroke hand pump that uses a little higher pressure to push the air in.  It maybe a different valve as ours is a pop up only - no twist to close.
Good luck!
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Good luck!
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