Move toilet a few feet. Question about drain pipe

[leonardoxiao]

We are doing the master bathroom renovation and would like to move the toilet a few feet. But it is just not possible to remove the whole existing vertical toilet drain and connect the new one. I am thinking of connecting the new toilet drain to the existing vertical pipe, as shown in the attached picture.

It's on the second floor with 2x12 joists. So there are plenty of room to put the correct slope of the new drain pipe.
So the question is: does it meet the code? Is it allowed to connect to the existing vertical pipe?
[Edit:] the pipe will be 3" ABS.

 

[John Gayewski]

Yes it's legal. You'd be better off cutting the old 90 out and just running straight pipe to a new 90. If you can get away from have a double 90° jog in the pipe you should do it.