Product review (1 stars): Very poor design! The 1/2 " white plastic coupling is ...
Very poor design! The 1/2 " white plastic coupling is way too short. It either pushes all the way into upper drain and hole or all the way into p-trap. P-trap should have had a stop ring I side tube to keep coupling from botttoming out. I had to go to Lowes and buy a 33cent 1/2 3.4" long plastic coupling! And I'm a pipefitter!