Reply by MrRon

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Posted on Using PVC for Dust Collection Systems

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5770 posts in 3783 days

#1 posted 03-26-2012 09:42 PM

There have been pros and cons on grounding of DC systems. The consensus seems to indicate that it’s not worth doing.
“you will have to cost justify the difference in flow between two 45’s with 1’ between or a sweeping 90. I would bet that there is not much difference.”
I think a sweeping 90° made from Bill Pentz’s web site costs less than 2-45’s. The idea was to make the inside as smooth as possible by eliminating the humps and dips at fitting joints. Flex duct presents the biggest loss of static pressure and thats where the long sweeps would be used.

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