With the Kansas wind blowing at 35mph for the last two weeks, I'm officially switching to a nipple waterer.  I'm tired of all the water being blown away.  I've got the nipples ordered, but have one quick question.  Do you need a valve at the top of the bucket for air flow?  I would think that you do, or you'd run the risk of vacuum lock, but it seems like the all of the ones that I have seen are sealed pretty tight.
	
		
			
		
		
	
				
			 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
			
		
		
		
	
	
			
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		