In my basement I have my washer right next to my tub sink. The washer drains into the tub sink which works but it has clogged up several times. I've emptied the trap at the bottom of the tub sink a few times and have added a mesh plug to the sink. But occasionally the sink fills too much and over flows pouring onto the floor making a big mess. I'd like to add a drain line directly into my waste pipe but what's the best way to accomplish this? Thanks!