I installed two sinks where I previously had one. I piped them both through their own p-trap and then into a T joint and into the wall. I have a leak on both drains here the p-trap comes up and connects to the pipe that goes to the T-Joint. The piece that is leaking has a flange molded into the pipe and I am using the connect nuts that came with the kit. I pulled it all apart and pieced it back together. It isn't leaking through the threads of the nut but on top where there is a space between the pipe and the nut. What to do?
Keith

You shouldn't have a space between the compression nut and the tailpiece. You're missing a gasket , or are you saying the tailpiece isn't long enough to mate with the conpression nut? If the tailpiece's too short go to a plumbing store and purchase a 1 1/4" threaded tailpiece ,(see image) and cut it to size. Good luck, Tom Regards, Tom