We recently replaced our pedestal sink with a sink and a vanity. The old pipe fitting under the sink were steel. since the new sink sat further from the wall than the old sink, we had to replace the discharge pipes. I replaced all the fittings under the sink with pvc including the pipe that went into the wall. However, the pipe that went into the wall is now leaking at the wall, not at a connection. I'm not sure what the fittings look like once they're in the wall, but the new pvc pipe is in as far as it can go. does anyone know what I have done to cause the sink to leak? Is there anything I should have done to replace the pipe that goes into the wall? should I put a steel pipe back in its place, etc? Thanks!
After reading this post twice, all I can say, with all due respect, is that you ought to call a plumber.
OH boy!
I have seen this kind of jury rig job before!
You will likely have to cut open the wall around the pipe to get to the leak. if it is galvanized pipe in the wall, you need to measure the outside diameter of the connection, (probably a tee) and go to your home center and get a Fernco connector. this is a black rubber connector with hose clamps on each end. you need one that will fit over the end of the fitting in the wall, and then you can tighten it with a screwdriver.
Now you can go to PVC pipe and do whatever fittings needed to make it fit the sink drain.