We are cuurently doing a remidel and adding a shower. Right now the toilet is 6" from the 3" main drain and has a 3" vent pipe. I can Tee into the 3" line right under the toilet very easily then I want to run a 2" ABS line for the shower. Will the toilet vent be enough or do I still need to vent the shower as well? If so how to I add the vent in that line? Thank you.