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Old 11-23-2009, 09:11 PM
jw223 jw223 is offline
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I could be wrong here, so please correct me if I am. I was tought that the square heal or throat made more of a difference if the fitting was used on the supply or the return. Radius heel is more important on the supply, where a radius throat is more important on the return. This is assuming that neither fitting has vanes. I perfer the look of radius fittings, and just install full length vanes. Comments? I think those pics come out of Manual D.
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