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			 Mine looks very similiar 
		
	
		
		
		
		
		
	
		
		
	
	
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			 Brass check valves are a lot more reliable.  That's the type recommended for CO2 applications.  You can get them at Princess Auto, welding supply stores and hydraulic suppliers. 
		
	
		
		
		
		
		
	
		
		
	
	
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