I'm trying to stop this setup from leaking and improve the drainage. The sink is a bit low, and the basket strainer drops a few inches. Below that, I have a tailpiece with a dishwasher connection, and a horizontal waste line followed by an elbow into what is called a NY Trap.
The issues are that:
a) the horizontal piece seems to leak -- possibly fro the right side compression fitting, and from the tailpiece-horizontal connection. b) the horizontal piece actually has a negative slope. This causes it to be something like a second p trap , and when full, the water seems to back up a bit into the sink until the air bubble gets out. This seems like it would increase the chances of having leaks.
I haven't been able to find a good way to plumb this -- only tailpieces with dishwasher attachements are too long to make the next pipe go horizontal. Also can't seem to get a good seal between the tailpiece and the horizontal piece.
What should I do to stop the leaks? (Note: water in tub was there from before -- previous horizontal piece corroded so badly that it actually started leaking at the turn.)