I absolutely HATE my durso. I have considered so many times buying a new tank because of it. People state with the right sized standpipe and pilot hole that its silent and fool proof.  
  
I have tried so many different which ways and still hate it compared to my last tanks herbie  
  
That being said I will never have anything other then herbies on any of my upcoming tanks. 
  
  
  
Can you take a picture of your durso please and give a little more info I don't see functionally how this happened and I can't wrap my head around it. 
		
	
		
		
		
		
		
	
		
		
	
	
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