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Old 04-12-2008, 01:52 PM
Number_Cruncher Number_Cruncher is offline
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Join Date: Apr 2007
Location: UK
Posts: 357
I remember a damper coming with instructions to place it the right way up, and excercise it through about half a dozen full cycles to expel air before fitting. I can't remember the damper type or brand, but, as it costs nowt, and takes all of 2 minutes of time, I do this with every new damper I install.
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