Hey Micheal, 
I have a similar problem with my skimmer when I take it off line to do maintaince.  If the output line is empty and the skimmer is restarted at full go ahead then it overflows.  I have to back off the input about half untill all the air is cleared from the output line and then I can open the input to full go. 
		
	
		
		
		
		
			
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Jonathan 
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