It seems there must be a way, but I cannot seem to wrap my head around it. Here's the scenario... I have a 24" line flowing with a wet gas (combustion flue gas) into a dryer. It comes in at 90 degrees F, at a rate of 180 SCF/M. It leaves the dryer at 73 degrees F at a rate of 124 SCF/M. I have a gauge that shows me the pressure differential between the 2 lines as 20.5 inches of water column. Is there a way, given the information provided, to calculate the pressures of the incoming and outgoing lines? Any help would be appreciated.