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plumbpleb

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I need to replace the diverter valve - I unscrewed it from the hydraulic block but for the life of me I can't get it out. I even spoke to Viessmann tech and they advised twisting and yanking hard but this tosser is not budging AT ALL. The valve was replaced 2 months ago by someone else. Is there perhaps a vacuum of some sort, it does have two seal rings. God I hate integrated diverters.
 
Are you gas safe registered?
 
If you can pm me this we can get this moved to the gas safe section
 

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