Posted by Terry Love on September 03, 1998 at 01:30:32:
In Reply to: Third floor bathroom addition posted by Gerald Berenson on August 31, 1998 at 20:47:22:
Yes, venting would be affected. Plumbing inspectors do not look kindly on waste going down vent pipes.
A plumbers solution would be to intercept the pipe at a point were it is still a waste line, even if it means going down to the crawlspace to find it. It is better to get it right while walls are open.
Good Luck
Terry