Originally Posted by Logan2
I took a small vanity out of the basement to install a new vanity and sink with a new fauset. Yhe problem I have is the sink I took out worked ok and the one I put in will not drain , The pipe are clean and a new trap, The water stays in the sink after the trap fills up. The only thing I can figure is the old sink had a overflo or vent in the side of the sink and the new sink does not have a hole. Could the sink not be getting the proper venting and the water cannot flow. That is the way the new sink was made, HELP PLEASE Charles
It sounds like there's no vent attached to the drain pipe.
Can you see a vent branch connected to the drain? There should be a Tee at the drain in the wall. The upper branch attaches to the vent which in turn connects to the main waste pipe.
If you're not sure, post some photos.