Avalon Stainless Bathtub Waste and Overflow Black Tubular 1-1/2 inch

The waste-and-overflow tube is the fitting on your bathtub that prevents the tub from overflowing by catching water that gets too high and diverting it down into the drain system. When water in the bathtub reaches the small hole in the overflow cover plate, the overflow drain channels the excess back down into the tub’s main drain pipe. When bath water reaches a set level, a properly working overflow drain prevents the tub from leaking through the ceiling.