Forum, Quick FDC connection, I just saw on some drawings that came in that the FDC is 4" with a 4" check valve and then reduced down to 2-1/2" with a reducing coupling. The system riser is 4", can you choke it down like that? Technically the FDC is the same size as the riser but where do you draw the line? I'm not liking it, what say you???
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