I recently had granite countertops installed in my house and now I have a deeper sing which is undermounted on the granite. When I went to hook to plumbing back up I can not get anything to work because the discharge port on my disposal is now the same height as my drain stub cut coming out of the wall. How do I need to plumb this cause now I can't get the p trap to work cause it is about an inch and a half to low?

Yes,you'll need to open the wall and lower the drain line.

That is what I was thinking but definitely not what I wanted to hear, I was hoping there was some easier solution to this problem

On some ''p'' traps the tube is of different length. Have u tried to reverse the trap?

Chuck

No I haven't tried to reverse the traps but if I did that then I was worried about the water being able to drain properly because that is a long way for the water to travel uphill and I would be worried about it getting clogged up to easily for stuff having to travel that far uphill

You could use an 1 1/2" glue trap and a regular 11/2" 90 degree elbow for a trap. I would use trap adapters or no hubs or ferncos so the trap is still removable.