I have a 4" pvc drainage pipe leak at a joint between the pipe and a fitting. It has not leaked for 10 years but I think after 10 years of the washing machine bouncing around when it spins and is not balanced has caused the pipe somehow to start leaking. The joint is right under the floor that the washing machine is on (pipe is under basement ceiling). the joint is very accessable. I'm looking for a sealant kind of fix rather than a replumb kind of fix. Epoxy? Primer and pvc solvent? I was the original installer. The fitting is a y fitting with 4" coming from the WC and 2" from up the line.