This Strainer Over-Flow Pipe is a must-have in any bar or venue that utilizes 3 compartment sinks for glass washing. It's main purpose is to fit snugly into your sink drains and act as a plug. The long plastic tube design with an opening at the top, is meant to prevent over flow of water when either filling your sinks or washing your glasses. The pipes are set in rubber bushings that are designed to fit both 1" and 1-1/2" drain openings. They make ideal companions for our strainer funnels.