The  4 holes on the sink need to bigger on it, to compensate the bigger size P-TRAP(FLANGE)#THAT WAS THE PROBLEM #OTHER-WORDS#THE SINK IS UNUSABLE #EITHER YOU HAVE TO SEND IT#BACK TO#WAYFAIR#FOR A REFUND,LIKE I DID OR #GET A PLUMBER TO GO #CUT WALL OUT TO CHANGE THE THE PIPE FLANGE#PIPES.ETC, IN OLDER HOUSES #MAYBE, SO NEW ONES, ASK QUESTION ABOUT,THE #SINK 4 HOLES THAT GOES UP AND DOWN IN THE BACK OF THE SINK, (I REPEAT &SAY)#GET THE SIZE #MEASUREMENTS OF THE HOLES, IN THE BACK OF THE SINK, BEFORE,YOU BUY#OTHER-WORDS#YOUR#PLAYING AT YOUR OWN #RISK