Then the elbow, then the long pipe.
Then, trouble. Instruction number three reads "Tighten pipe to ANSI standards." Yeah, right. Who knows what that means. As I got the long pipe on, it acted as a long lever and gravity loosened the tee/nipple/elbow connection. Now this was my second biggest worry abou this installation. I'd feared that the install would require me to turn an elbow to a specific direction and tightness, but that those two qualities would not both be acceptable at the same time. In this case, I turned the elbow until it was (kinda) tight, not over tight, but so it was pointing in the right direction. I then found out that THAT particular rotation was not tight enough.
So, it had to be taken apart and turned another 300 degrees to make it line up properly again and be another turn *tighter*.
I put the bracket back on so I could put some real torque on the long pipe.