YOU ALSO HAVE A VENT ISSUE, THE VESSEL SINK DOESN'T HAVE THE LITTLE HOLE IN IT LIKE A VANITY SINK, THERE FOR THE WATER IS GOING DOWN THE DRAIN BUT THE AIR CAN NOT COME OUT, YOU NEED TO INSTALL A STUDOR VENT OR AN INLINE VENT INTO THE DRAIN BETWEEN THE WALL AND THE TRAP CUT IN A TEE AND BRING A PIPE UP TO THE BOTTOM OF THE COUNTER TOP AND INSTALL THE VENT, USALLY HAVE TO PUT A FEMALE ADPT ON THE TOP OF THE PIPE THE VENT COMES WITH THREADS DO NOT GLUE IT IN PLACE, THEY HAVE A RUBBER FLAPPER THAT OPENS WHEN THE WATER IS GOING THRU THE DRAIN AND ALLOWS IT TO PULL IN AIR THEN THE FLAP CLOSES WHEN NO WATER IS RUNNING TO KEEP THE SEWER SMELL OUT