I just installed a new bathroom sink/vanity.Before the install there was no slow draining at all.Now it backs up immediately at takes forever to drain.I did install a new trap,etc.Any help?

Hey Rob,

If there has been nothing that fell down into the drain during installation then it sounds like you have a blockage in the lateral,(horizontal) line in the wall. Remove the "J" bend of the trap and send a snake through the traps tail up into the wall. You will run into a 90 about 8 inches in but once past that you only need to put out about 6 more feet. After, flush the line with hot water.
Good luck, Tom