A picture would help!
For what it's worth, we had an SOB rig here that was leaking a LOT near that T-connection -- because the whole business had literally been broken off in an unhappy meeting with a tall curb on the way here. An AS then came in and was parked nearby, so I examined and found that the black/gray drain pipes and T fittings were nearly identical on AS and SOB. That's good news!
And to make the good news even better, the owner of the SOB was able to get repair parts from the hardware store in Taos. Excellent news!
But really it all depends on exactly where your leak is, and that's where a picture or two or three would help greatly.