hi folks – I can’t post a picture because the camera battery is dead. I have to replace the sink plumbing in a bathroom. The stuff is really old falling apart (in my hand). The drain stub-out coming out of the wall I believe is brass. I cleaned out the old metal pieces of the trap arm from inside the stub-out where it had broken off. Got it all out. The piping is 1 ¼ and just for a test I tried an old PVC 1 ¼ trap arm I had laying around with a nut and washer and fastened the PVC trap arm into the stub-out. But here’s the thing. Inside the stub-out there looks to be a stop about 1 inch down the pipe. So after you push the pipe as far as it will go (one inch) into the stub-out, and then put the nut and washer on, you are only holding onto about an 1 ¼ of the trap arm. But it seems to be pretty tight. The stop inside the stub-out looks like a machined ridge where I guess the pipe actually gets a little smaller at that point. It seems to only go about 1/3 of the way around the inside of the pipe, because, I believe, there is a lot of corrosion inside the pipe and so the stop has been corroded the other 2/3 of the way around the pipe. That’s the way it looks to me anyway. I cleaned the stub-out out the best I could and the ridge I’m talking about certainly looks machined – not some kind of buildup. My question is: does it make any sense that there would be a stop such that you can only push a pipe inside to a depth of an inch? Any thoughts would be greatly appreciated!

The tail pipe that leads down into the s-trap is leaky. I've included pics of the setup. The tail pipe just pushes up against the drain and is held in place by the washer and lock nut, it's a very flimsy setup. What would be the best way to deal with this? Thanks! [ATTACH]64768[/ATTACH][ATTACH]64769[/ATTACH][ATTACH]64771[/ATTACH]