Slow Draining Pedestal Sink

I recently remodeled my bathroom and had a licensed plumber re-locate the sink waste line so it would line up with my pedestal sink. He raised the line 3 inches. The line is a T with the top of the T venting up, and the other side is for the waste flow out.

I installed the pedestal sink with p-trap and tail pipe and have noticed that after 4-5 seconds of the water being turned on, the water starts backing up and drains very slowly there after.

I have tried to remove and re-install the p-trap and that has not worked. This bathroom has hardly had any use, and I am a new homeowner, so I really do not know how well the bathroom worked beforehand because I was remodeling the bathroom day one after closing.

Attached is a picture of the tail pipe (yes, it is missing the nut and washer)


and picture of the old and new plumbing


I'm not sure what to try to troubleshoot to find the problem. Thoughts?

I don't see anywhere the drain line has been raised, if he did what I think adding two ells to get the drain up you have major problems, you will have to cut back into the wall

Seeing as you say you had a licensed plumber do this simple drain modification, I am inclined to think that he couldn't have done something foolish....although I have been wrong plenty of times before with that assumption.

Since you say you just bought the place and started reno's right after closing, and the fact that you have galvanized piping, I would think that the lines are just clogged more than you are used to. You may want to get the drain camera'd.

You do not show the revised sink drain in either picture. I would also like to see a picture of the sink. Does it have an overflow opening inside the sink's basin?

without an overflow hole, a sink can drain slowly, as you have described.

When you said you had a plumber do this and that to the drain line, it can lead people to believe that the same sink was moved. I'll bet you changed the sink.

A new sink would be a good assumption, since if it were the "old" one the drain would have had to moved sideways AND raised.

Thanks everyone for the observations. I was thinking there may have been something more severly wrong, but turns out that all I needed was a little liquid plumber to clean out the drain pipe and now the sink drains with no issues.

ernieden said:

Thanks everyone for the observations. I was thinking there may have been something more severly wrong, but turns out that all I needed was a little liquid plumber to clean out the drain pipe and now the sink drains with no issues.

Click to expand...

I got an adaptor that goes from aerator threading to garden hose threading. A half-foot length of the hose with the tap full on usually blasts the drain clean.

quote; all I needed was a little liquid plumber to clean out the drain pipe

What you really mean is you used some drain cleaning liquid to get the flow going. It did NOT "clean out the drain pipe", it opened enough of an opening so IT could flow away. The water is now flowing through that passage, but when it closes again you will have the same problem.