T&S Brass commercial style sink drains and waste valves are available for 3" or 3-1/2" sink openings. Utilizing a twist or lever operated handle below the sink, T&S waste valves prevent the user from reaching into the grime and dirty water that collects when washing dishes. This feature is a "must have" in the food service world. Traditional pop-up style waste valves have a removable/replaceable stopper that can be changed at any time. We also offer the B-39K waste valve repair kit that includes new washers and gaskets to fix an existing T&S waste valve assembly.