I think I might know where sincity is going with this correct me if I am wrong. Take a no hub coupler like Jack has left over and make sure it has the same ID as the pipe or am I thinking wrong? I know they make a 3x2.5" reducer coupler(problem with this one it has a rib where the 2 pipes meet) or like the 3" one Jack used. Or take the 3" coupler and try that in there also? Is it long enough or will the sides kink in and cause less air flow/turbulance?
-Lars
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