Tughillrzr
In the Trades
Ok I usually do most repairs on my stuff but have been busy so I hired a licensed plumber to replace old cast drain iron stack from a second floor bath of an apartment to the basement. The picture below is what I have. toilet is draining into a waste tee and another waste tee drains the tub placed before the toilet. The other 3” drain pipe line is the sink drain and that continues to roof. No way or reason a wye couldn’t have been used. So not only do I have one toilet on a tee they did the exact same thing in the basement for the bathroom on the first floor. Plenty of room in both areas. I can’t think of any reason but I was always taught drain tee is only used for horizontal to vertical directional fitting.