maintenance man
New Member
I am building a new room on my house. I have a 4" line going at a 45 degree angle for 3 feet up to the toilet. I am trying to tie into the side of this line to then go over and up with a 3" vent. Can I just use a tee coming right off the side of this line, or must it be a Y for a vent line? Also is it okay to come off the side of this line or must I come off the top of the line and then make a turn in order to get over to where my vent will go up to the roof? The dirty line on the left goes to toilet flange, the elbow on the right is the vent I am trying to get over to.