It looks like you could disconnect the long pipe fairly easily and test it with the ball valve just connected to the nipple coming out. I'd be real interested in the answer to this one as I just bought the pipe today to make all four of the intakes that I am doing on a new drum. I bought 24" nipples to do this with. I'm not sure that the total exhaust on the two pipes you have going is enough, on the one that I do have up and running, there are 8 half inch holes to vent...
[FONT=Microsoft Sans Serif]Two Big Fat 22.5" WSM's[/FONT]
[FONT=Microsoft Sans Serif]Two Well Worn UDS's[/FONT]
[FONT=Microsoft Sans Serif]Great Outdoors Smokey Mountain Gasser[/FONT]
[FONT=Microsoft Sans Serif]KCBS Member and CBJ[/FONT]