Tall tube sits in the wet dry with the short clear tube (white part down) on top of that, then the blue cap. The hole in the side of that unit has me slightly perplexed (unless the water line comes up over it). The black hose is the airline tube with the adjustment valve on it. Does one end of the black hose plug onto the pump? My black hose connects to my E. What does your wet/dry look like?