[Latitude 28]

Rounded up my fittings for the AH exhaust.  Because the "Y" connector at the vertical stack has a flared tube that the AH exhaust tube slides into there is an union at the AH.  The original had a short tubing welded to the union with the crossover tube flared and clamped over that short tube...that was a major source of the leak.  I wanted to make this joint tight and repairable.   I took a 1 1/4" Rigid electrical conduit coupling and hammered it inside the crossove exhaust tube.  That gave me a solid monolithic pipe thread joint to connect a standard 1 1/4" pipe union to the AH piping.