: I am adding a full bath to my unfinished up stairs. I plan on connecting the toilet and tub to the 3" vent line which comes from the downstairs 1/2 bath below.

: The toilet connection is aprox. 4" below my tub drain inlet. Does anyone forsee any problems?

KH,
I believe Marty and I see problems with dumping a bathroom into the vent pipe. The drawing above is what it should look like. Terry