A must have in any bar or restaurant that has the 3 sink washing department. The strainer over-flow Fits snugly in your sink drain acting as a plug. The design is meant to prevent over-flow of water when either filling up your sinks or washing your glasses. The Plastic pipes set in rubber bushings to fit both 1″ and 1-1/2″ drains. Ideal companions for our strainer funnels.